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Solidot EC4 – Support, Wiring Diagram & Commissioning

Interaktiver Anschlussplan Solidot EC4

Everything for your Solidot EC4 after purchase – for all 18 models in the Shop: digital with 16 or 32 channels, relay and analog with four or eight channels:

  • Interactive wiring diagram: system and field supply, PNP sensors, loads, relays, 2-, 3- and 4-wire transmitters, analog output to a drive, EtherCAT to the master and further devices in the line, with cable cross-sections and parameters

  • EtherCAT: ESI file, adding it in TwinCAT, CODESYS and Sysmac Studio, objects and parameters for your model

  • First steps: commissioning in ten steps, from the DIN rail to the first signal in the EtherCAT master

  • Dimensions & mounting: outside dimensions, DIN rail, minimum clearances, connectors and cross-sections

  • Downloads: user manual, ESI files, 2D and 3D drawings and EPLAN macros

  • Free support from spstiger if you get stuck

Further down:HelpDownloads

Interactive wiring diagram

Tap a terminal or wire in the drawing to see details.

Terminal overview EC4

TerminalGroupmm²Function
PESupply0.3–1.5Earth. Connect PE securely to earth (manual ch. 6.2).
0VSupply0.3–1.50 V of the system supply.
24VSupply0.3–1.5System supply +24 V DC (18–36 V) for the module electronics, ≤ 500 mA (manual ch. 3.5). Keep it separate from the field supply of the inputs and outputs.
OUTEtherCAT–EtherCAT output: cable to the IN of the next device; leave free if the module is the last one in the line. 100 Mbit/s, RJ45, shielded cable Cat. 5 or higher (STP), max. 100 m between two devices. LED on the socket: green = link, yellow flashing = data exchange. On the top, OUT is directly next to the supply connector, IN is on the outside.
INEtherCAT–EtherCAT input: cable from the master or from the OUT of the previous device. 100 Mbit/s, RJ45, shielded cable Cat. 5 or higher (STP), max. 100 m between two devices. LED on the socket: green = link, yellow flashing = data exchange. On the top, OUT is directly next to the supply connector, IN is on the outside.
X00Block A 1–100.3–1Digital input X00, PNP: “1” at 15–30 V, “0” at −3…+3 V referred to 0 V, 4 mA, filter 3 ms, optically isolated. EtherCAT: object 0x6000:01 “Channel In1” (BOOL).
X01Block A 1–100.3–1Digital input X01, PNP: “1” at 15–30 V, “0” at −3…+3 V referred to 0 V, 4 mA, filter 3 ms, optically isolated. EtherCAT: object 0x6000:02 “Channel In2” (BOOL).
X02Block A 1–100.3–1Digital input X02, PNP: “1” at 15–30 V, “0” at −3…+3 V referred to 0 V, 4 mA, filter 3 ms, optically isolated. EtherCAT: object 0x6000:03 “Channel In3” (BOOL).
X03Block A 1–100.3–1Digital input X03, PNP: “1” at 15–30 V, “0” at −3…+3 V referred to 0 V, 4 mA, filter 3 ms, optically isolated. EtherCAT: object 0x6000:04 “Channel In4” (BOOL).
X04Block A 1–100.3–1Digital input X04, PNP: “1” at 15–30 V, “0” at −3…+3 V referred to 0 V, 4 mA, filter 3 ms, optically isolated. EtherCAT: object 0x6000:05 “Channel In5” (BOOL).
X05Block A 1–100.3–1Digital input X05, PNP: “1” at 15–30 V, “0” at −3…+3 V referred to 0 V, 4 mA, filter 3 ms, optically isolated. EtherCAT: object 0x6000:06 “Channel In6” (BOOL).
X06Block A 1–100.3–1Digital input X06, PNP: “1” at 15–30 V, “0” at −3…+3 V referred to 0 V, 4 mA, filter 3 ms, optically isolated. EtherCAT: object 0x6000:07 “Channel In7” (BOOL).
X07Block A 1–100.3–1Digital input X07, PNP: “1” at 15–30 V, “0” at −3…+3 V referred to 0 V, 4 mA, filter 3 ms, optically isolated. EtherCAT: object 0x6000:08 “Channel In8” (BOOL).
24VBlock A 1–100.3–1Field supply +24 V DC of block DI. Terminals 9 and 19 are connected internally.
0VBlock A 1–100.3–10 V of the field supply. Terminals 10 and 20 are connected internally.
X08Block A 11–200.3–1Digital input X08, PNP: “1” at 15–30 V, “0” at −3…+3 V referred to 0 V, 4 mA, filter 3 ms, optically isolated. EtherCAT: object 0x6000:09 “Channel In9” (BOOL).
X09Block A 11–200.3–1Digital input X09, PNP: “1” at 15–30 V, “0” at −3…+3 V referred to 0 V, 4 mA, filter 3 ms, optically isolated. EtherCAT: object 0x6000:0A “Channel In10” (BOOL).
X0ABlock A 11–200.3–1Digital input X0A, PNP: “1” at 15–30 V, “0” at −3…+3 V referred to 0 V, 4 mA, filter 3 ms, optically isolated. EtherCAT: object 0x6000:0B “Channel In11” (BOOL).
X0BBlock A 11–200.3–1Digital input X0B, PNP: “1” at 15–30 V, “0” at −3…+3 V referred to 0 V, 4 mA, filter 3 ms, optically isolated. EtherCAT: object 0x6000:0C “Channel In12” (BOOL).
X0CBlock A 11–200.3–1Digital input X0C, PNP: “1” at 15–30 V, “0” at −3…+3 V referred to 0 V, 4 mA, filter 3 ms, optically isolated. EtherCAT: object 0x6000:0D “Channel In13” (BOOL).
X0DBlock A 11–200.3–1Digital input X0D, PNP: “1” at 15–30 V, “0” at −3…+3 V referred to 0 V, 4 mA, filter 3 ms, optically isolated. EtherCAT: object 0x6000:0E “Channel In14” (BOOL).
X0EBlock A 11–200.3–1Digital input X0E, PNP: “1” at 15–30 V, “0” at −3…+3 V referred to 0 V, 4 mA, filter 3 ms, optically isolated. EtherCAT: object 0x6000:0F “Channel In15” (BOOL).
X0FBlock A 11–200.3–1Digital input X0F, PNP: “1” at 15–30 V, “0” at −3…+3 V referred to 0 V, 4 mA, filter 3 ms, optically isolated. EtherCAT: object 0x6000:10 “Channel In16” (BOOL).
24VBlock A 11–200.3–1Field supply +24 V DC of block DI. Terminals 9 and 19 are connected internally.
0VBlock A 11–200.3–10 V of the field supply. Terminals 10 and 20 are connected internally.
Y00Block B 1–100.3–1Digital output Y00, PNP: switches +24 V to the load, max. 500 mA, resistive and inductive loads, protected against overvoltage and overcurrent. EtherCAT: object 0x7000:01 “Channel Out1” (BOOL).
Y01Block B 1–100.3–1Digital output Y01, PNP: switches +24 V to the load, max. 500 mA, resistive and inductive loads, protected against overvoltage and overcurrent. EtherCAT: object 0x7000:02 “Channel Out2” (BOOL).
Y02Block B 1–100.3–1Digital output Y02, PNP: switches +24 V to the load, max. 500 mA, resistive and inductive loads, protected against overvoltage and overcurrent. EtherCAT: object 0x7000:03 “Channel Out3” (BOOL).
Y03Block B 1–100.3–1Digital output Y03, PNP: switches +24 V to the load, max. 500 mA, resistive and inductive loads, protected against overvoltage and overcurrent. EtherCAT: object 0x7000:04 “Channel Out4” (BOOL).
Y04Block B 1–100.3–1Digital output Y04, PNP: switches +24 V to the load, max. 500 mA, resistive and inductive loads, protected against overvoltage and overcurrent. EtherCAT: object 0x7000:05 “Channel Out5” (BOOL).
Y05Block B 1–100.3–1Digital output Y05, PNP: switches +24 V to the load, max. 500 mA, resistive and inductive loads, protected against overvoltage and overcurrent. EtherCAT: object 0x7000:06 “Channel Out6” (BOOL).
Y06Block B 1–100.3–1Digital output Y06, PNP: switches +24 V to the load, max. 500 mA, resistive and inductive loads, protected against overvoltage and overcurrent. EtherCAT: object 0x7000:07 “Channel Out7” (BOOL).
Y07Block B 1–100.3–1Digital output Y07, PNP: switches +24 V to the load, max. 500 mA, resistive and inductive loads, protected against overvoltage and overcurrent. EtherCAT: object 0x7000:08 “Channel Out8” (BOOL).
24VBlock B 1–100.3–1Field supply +24 V DC of block DO. Terminals 9 and 19 are connected internally.
0VBlock B 1–100.3–10 V of the field supply. Terminals 10 and 20 are connected internally.
Y08Block B 11–200.3–1Digital output Y08, PNP: switches +24 V to the load, max. 500 mA, resistive and inductive loads, protected against overvoltage and overcurrent. EtherCAT: object 0x7000:09 “Channel Out9” (BOOL).
Y09Block B 11–200.3–1Digital output Y09, PNP: switches +24 V to the load, max. 500 mA, resistive and inductive loads, protected against overvoltage and overcurrent. EtherCAT: object 0x7000:0A “Channel Out10” (BOOL).
Y0ABlock B 11–200.3–1Digital output Y0A, PNP: switches +24 V to the load, max. 500 mA, resistive and inductive loads, protected against overvoltage and overcurrent. EtherCAT: object 0x7000:0B “Channel Out11” (BOOL).
Y0BBlock B 11–200.3–1Digital output Y0B, PNP: switches +24 V to the load, max. 500 mA, resistive and inductive loads, protected against overvoltage and overcurrent. EtherCAT: object 0x7000:0C “Channel Out12” (BOOL).
Y0CBlock B 11–200.3–1Digital output Y0C, PNP: switches +24 V to the load, max. 500 mA, resistive and inductive loads, protected against overvoltage and overcurrent. EtherCAT: object 0x7000:0D “Channel Out13” (BOOL).
Y0DBlock B 11–200.3–1Digital output Y0D, PNP: switches +24 V to the load, max. 500 mA, resistive and inductive loads, protected against overvoltage and overcurrent. EtherCAT: object 0x7000:0E “Channel Out14” (BOOL).
Y0EBlock B 11–200.3–1Digital output Y0E, PNP: switches +24 V to the load, max. 500 mA, resistive and inductive loads, protected against overvoltage and overcurrent. EtherCAT: object 0x7000:0F “Channel Out15” (BOOL).
Y0FBlock B 11–200.3–1Digital output Y0F, PNP: switches +24 V to the load, max. 500 mA, resistive and inductive loads, protected against overvoltage and overcurrent. EtherCAT: object 0x7000:10 “Channel Out16” (BOOL).
24VBlock B 11–200.3–1Field supply +24 V DC of block DO. Terminals 9 and 19 are connected internally.
0VBlock B 11–200.3–10 V of the field supply. Terminals 10 and 20 are connected internally.
LED––System indicators RUN, PWR and ERR on the front, one LED each on the IN and OUT sockets and one green LED per channel next to the terminal.
CHLED––One green LED per channel to the left of the terminals, level with the terminal row; with two LEDs per row, the left one is for terminals 1–8, the right one for 11–18. The drawing shows an example: green = on, grey = off.

* Clamping range not stated in the manual, derived.

EtherCAT: ESI file, integration and process data

This is how you integrate the EC4 into your EtherCAT master: install the ESI file, connect the module to IN, scan. You do not need an IP address or a device name. Below are all channels of your model with their object, plus the startup parameters.

At a glance

ESI file
EcatTerminal-EC4_V4.04_BOOL.xml
Vendor ID
0x00884443
Address
automatic (position in the line)
Transmission
100 Mbit/s, 2 × RJ45 (IN, OUT)
Tested in the manual
TwinCAT 3, CODESYS V3.5, Omron Sysmac Studio
  • One ESI file for all EC4 models. During the scan the master recognizes the model by its product code.
  • Cable from the master to IN, the next device to OUT.

Which ESI file?

The ZIP “EC4-XML V1.2” under Downloads contains the current file EcatTerminal-EC4_V4.04_BOOL.xml: each channel is a separate BOOL (Channel In1, Channel Out1 …). The manual still gives older file names (“Solidot EC4_V1.0.2.xml” or “V1.1.7”) – use the file from the ZIP.

The subfolder contains two V4.02 versions in which the digital channels are transferred as a byte (USINT) or word (UINT). You only need them if your controller cannot map single bits. Install only one of the files in the project.

For some analog models the ESI also contains types with “V1” (e.g. EC4-A80V1) without range setting. The manual does not explain them; during the scan the master selects the type that the module reports.

Adding it to your master

TwinCAT 3
  1. Copy the ESI file to C:\TwinCAT\3.1\Config\Io\EtherCAT and restart TwinCAT.
  2. Start TwinCAT XAE and create a “New TwinCAT Project”.
  3. Right-click I/O → Devices → Scan, select the network card connected to the module, confirm “Scan for boxes” with Yes and “Activate Free Run” with Yes.
  4. The module appears as a box; the “Online” tab shows OP, and RUN on the module lights steadily.
  5. Parameters: select the module → Startup tab → New → select object 0x8000:xx and enter the value. Then reload the configuration and the program.
CODESYS V3.5
  1. Tools → Device Repository → Install → select the ESI file; the message “Device … installed to device repository” confirms the installation.
  2. Add an “EtherCAT Master” to the controller (Fieldbuses → EtherCAT → Master).
  3. In the master, click “Browse” and select the network card for the EtherCAT line.
  4. Before the first scan, select the controller and install the device (manual chap. 7.2.2, step 5), then right-click Master → Scan for Devices and copy the modules found into the project.
  5. Under “EtherCAT I/O Mapping”, assign variables and select “Enabled 1” for updating, log in again and start.
Omron Sysmac Studio
  1. Configurations and Setup → EtherCAT → right-click Master → Display ESI Library → Install (File) → select the ESI file.
  2. In the Toolbox, expand “Nanjing Solidot Electronic Technology Co., Ltd.” and insert the module by double-clicking.
  3. Controller → Communication Setup: “Ethernet connection via a hub”, enter the IP address of the controller, “Ethernet Communications Test”.
  4. Go online, right-click Master → Write Slave Node Address, enter the node address, Write – then switch the module off and on again.
  5. Controller → Transfer → To Controller, then power-cycle the controller and the module.
  6. Parameters: offline, select the module → “Edit Setting Parameters” (with older controller firmware via EC_CoESDOWrite/EC_CoESDORead). I/O Map for monitoring and forcing.

EC4-1616B · 16 DI / 16 DO PNP 0.5 A

Terminals A1–A20 = upper block, B1–B20 = lower block.

ESI typeProduct codeInputsOutputs
EC4-1616B(W)0x0000000616 × BOOL16 × BOOL

Digital inputs X00–X0F

TerminalSignalObjectName in the ESI
A1X000x6000:01Channel In1
A2X010x6000:02Channel In2
A3X020x6000:03Channel In3
A4X030x6000:04Channel In4
A5X040x6000:05Channel In5
A6X050x6000:06Channel In6
A7X060x6000:07Channel In7
A8X070x6000:08Channel In8
A11X080x6000:09Channel In9
A12X090x6000:0AChannel In10
A13X0A0x6000:0BChannel In11
A14X0B0x6000:0CChannel In12
A15X0C0x6000:0DChannel In13
A16X0D0x6000:0EChannel In14
A17X0E0x6000:0FChannel In15
A18X0F0x6000:10Channel In16

Show wiring “PNP sensors on DI”

Digital outputs Y00–Y0F

TerminalSignalObjectName in the ESI
B1Y000x7000:01Channel Out1
B2Y010x7000:02Channel Out2
B3Y020x7000:03Channel Out3
B4Y030x7000:04Channel Out4
B5Y040x7000:05Channel Out5
B6Y050x7000:06Channel Out6
B7Y060x7000:07Channel Out7
B8Y070x7000:08Channel Out8
B11Y080x7000:09Channel Out9
B12Y090x7000:0AChannel Out10
B13Y0A0x7000:0BChannel Out11
B14Y0B0x7000:0CChannel Out12
B15Y0C0x7000:0DChannel Out13
B16Y0D0x7000:0EChannel Out14
B17Y0E0x7000:0FChannel Out15
B18Y0F0x7000:10Channel Out16

Show wiring “Valve and lamp on DO”

Startup parameters (object 0x8000)

ObjectName in the ESIDefaultMeaning
0x8000:01BusFault_Clear/Hold0Outputs on bus failure: 0 = switch off (factory default), 1 = hold state (value derived)

Range codes and conversion of the analog channels

Voltage (EC4-A40V, -A80V, -A04V, -A08V)

CodeRangeValue rangeInput formula (D = value)Output formula
0±10 V−32768 … 32767D = 65535/20 · UU = 20 · D / 65535
10–10 V0 … 32767D = 32767/10 · UU = 10 · D / 32767

Current (EC4-A40I, -A80I, -A04I, -A08I)

CodeRangeValue rangeInput formula (D = value)Output formula
04–20 mA0 … 65535D = 65535/16 · I − 16384I = 16 · (D + 16384) / 65535
10–20 mA0 … 65535D = 65535/20 · II = 20 · D / 65535

Example from the manual table: 5 V in the ±10 V range gives D = 16384, 12 mA in the 4–20 mA range gives D = 32767.

Range per channel via “Range Setting” in object 0x8000 as a startup parameter (manual chap. 3.3, 7.1.3).

If it does not work

ProblemCheck
Module is not found or not recognized during the scanESI file installed? Current version from EC4-XML V1.2? Software restarted after installation? (manual chap. 8.1)
Module does not go to OPProject created and activated? Supply OK? IN/OUT cables correct? With Sysmac: node address written and module power-cycled afterwards? (chap. 8.2)
RUN keeps flashing5 Hz = Pre-OP, 2 Hz = Safe-OP: the master has not yet switched the module to OP – activate or download the configuration.
Analog value is wrongCheck the Range Setting of the channel (0x8000) and convert with the formula for the selected range.
Outputs stay on after bus failure0x8000:01 BusFault_Clear/Hold is set to 1 (Hold).
For specialists
ItemValue
Vendor ID0x00884443 (Nanjing Solidot Electronic Technology Co., Ltd)
Revision0x00000001 for all EC4 types in ESI V4.04
MailboxCoE, SM0/SM1 128 bytes each
Process datafixed PDOs 0x1A00 (inputs, object 0x6000) and 0x1600 (outputs, object 0x7000)
Distributed Clocksnot provided for the I/O modules (ESI without DC), operation in Free Run or SM-synchronous
Digital input filterfixed at 3 ms, not adjustable per channel (chap. 7.1.2)
Analog filtermoving average, 1–1024 conversions per channel, factory default 10; sampling 800 µs for 8 channels, 400 µs for 4 channels (chap. 7.1.4)
  • That “Channel In1” or “Channel Out1” (subindex 1) corresponds to channel X00 or Y00 is derived from the order of the entries in the ESI; the manual only shows examples.
  • After changing startup parameters, reload the configuration; with Sysmac Studio, power-cycle the controller and the module (manual chap. 7).

Source: EC4 Series User Manual V1.18 (11/2025), chap. 3, 4.2, 7, 8; ESI EcatTerminal-EC4_V4.04_BOOL.xml (EC4-XML V1.2, 10.04.2026).

First steps with the Solidot EC4

The EC4 brings inputs and outputs straight into EtherCAT: two sockets IN and OUT, spring-clamp terminals, integration via an ESI file. This guide applies to all EC4 models in the shop – digital with 16 or 32 channels, relay and analog with four or eight channels. It takes you from the DIN rail to the first signal in the master: supply, wire, install the ESI, scan and test.

Before connecting

  • Mount and remove only with the power off (manual chap. 5).

  • The module has protection class IP20 and belongs in a control cabinet or an enclosure.

  • Set up the system supply (module electronics) and the field supply (inputs and outputs) separately and do not mix them.

  • Ground PE at the supply terminal securely.

  • Relay modules: only DC voltage up to 48 V at the contacts (note in the connection diagram).

  1. 1Mount on the DIN railRequired

    The module measures 25 × 102 × 72 mm (W × H × D), weighs about 140 g and snaps onto a 35 mm DIN rail. It must be mounted vertically so that air can flow through the housing.

    Operating temperature −10 to +60 °C. Minimum clearances and connector dimensions are in the “Dimensions & mounting” tab.

    Mounting

    1. Pull the latch at the bottom of the module outwards until it audibly clicks into place.

    2. Hook the module onto the top of the DIN rail and swing it onto the rail.

    3. Push the latch towards the rail until it clicks.

    4. Removal: insert a flat-blade screwdriver into the latch, lever it towards the module and swing the module off.

    Source: Manual chap. 3.1, 5

  2. 2Connect system and field supplyRequired

    The system supply powers the electronics: 24 V DC (18–36 V), max. 500 mA, at the three-pole terminal on the top, assigned 24V, 0V and PE.

    The field supply powers the inputs and outputs via 24V/0V in the terminal block (terminal 9/10 and 19/20, each pair connected internally). Modules with two blocks need it on both blocks.

    Relay modules (EC4-0012J, EC4-1612J): the relay block gets 24 V at terminal 10 and 0 V at terminal 20. You supply the loads via COM0–COM2 from a separate load supply.

    The manual recommends twisted wires for the supply line. The signal terminals are rated for 9.5 A; the cross-sections in the connection diagram are derived from this and from the total current.

    After switching on, PWR lights up green.

    Show wiring “System supply 24 V”Show wiring “Field supply 24 V”

    Source: Manual chap. 3.1, 3.2, 3.5, 6.1, 6.2, connection diagrams chap. 6.3

  3. 3Wire inputs and outputsRequired

    Strip 10 mm of insulation; use a wire ferrule (10 mm) for fine-stranded wires. Press the button above the terminal with a flat-blade screwdriver up to 3 mm wide and insert the wire.

    Digital inputs of the B models are PNP, filter fixed at 3 ms. On the EC4-1612J the inputs are NPN/PNP compatible: COM to 0 V for PNP sensors, to +24 V for NPN sensors.

    Transistor outputs switch +24 V, max. 500 mA. Relay outputs switch up to 2 A in three groups of four contacts each (COM0: Y00–Y03, COM1: Y04–Y07, COM2: Y08–Y0B).

    Analog channels: signal to AI or AO (terminal 1–8), reference to COM (terminal 11–18), twisted and shielded.

    Show wiring “PNP sensors on DI”Show wiring “Valve and lamp on DO”Show wiring “Loads on relays”Show wiring “Transmitter 4-wire”Show wiring “3-wire transmitter”Show wiring “2-wire transmitter 4–20 mA”Show wiring “Setpoint to frequency inverter”

    Source: Manual chap. 3.2, 3.3, 6.1–6.3, 7.1.2

  4. 4Have the ESI file readyRequired

    Your EtherCAT master only knows the EC4 once it has its device description (ESI). The ZIP “EC4-XML V1.2” under Downloads contains one file for all models: EcatTerminal-EC4_V4.04_BOOL.xml.

    The manual still gives older file names (“Solidot EC4_V1.0.2.xml” or “V1.1.7”). Use the file from the ZIP. You only need the two versions in the subfolder if your controller cannot map single bits.

    The ESI type and product code for your model are in the EtherCAT tab.

    ESI type for my model

    Source: Manual chap. 7.2; ESI V4.04

  5. 5Integrate the module in the master (TwinCAT 3)Required

    Plug the cable from the master into IN. You do not need an IP address or a device name: the master finds the module during the scan by its position in the line.

    The manual shows the integration in detail with TwinCAT 3, CODESYS V3.5 and Omron Sysmac Studio. Here is the short version for TwinCAT; the other two are in the EtherCAT tab.

    TwinCAT 3

    1. Copy the ESI file to C:\TwinCAT\3.1\Config\Io\EtherCAT and restart TwinCAT.

    2. Open TwinCAT XAE and create a “New TwinCAT Project”.

    3. Right-click I/O → Devices → Scan and select the network card connected to the module.

    4. Confirm “Scan for boxes” and “Activate Free Run” with Yes each.

    Success: the “Online” tab shows the state OP, and RUN on the module lights steadily. If RUN flashes at 5 Hz, the module is in Pre-OP; at 2 Hz, in Safe-OP.

    Show wiring “EtherCAT to the master”

    Source: Manual chap. 4.2, 7.2.1

  6. 6Omron Sysmac Studio: write the node addressOptional

    With Omron controllers (example in the manual: NX1P2), every module needs a node address that matches the configuration. It is written into the module.

    Node address

    1. ESI library: Configurations and Setup → EtherCAT → right-click Master → Display ESI Library → Install (File).

    2. Insert the module from the Toolbox (Nanjing Solidot Electronic Technology Co., Ltd.) by double-clicking.

    3. Go online, right-click Master → Write Slave Node Address, enter the address, Write.

    4. Switch the module off and on again, then transfer the configuration (Transfer → To Controller) and power-cycle again.

    Source: Manual chap. 7.2.3

  7. 7Test inputs and outputsRequired

    Each channel is a separate BOOL: inputs in object 0x6000 (“Channel In1”, “Channel In2” …), outputs in object 0x7000 (“Channel Out1” …). Analog channels are 16-bit values (“Analog Input[0]” or “Analog Output[0]”).

    Check in TwinCAT

    1. Switch a sensor at X00: under Inputs → Channel In1 the value changes, and the channel LED lights green.

    2. Set an output: Outputs → Channel Out1 → Online tab → Write, value 1 – Y00 switches, and the LED lights up.

    3. Analog output: write Analog Output[0], e.g. 32767 in the ±10 V range for 10 V, and check with a meter.

    That “Channel In1” corresponds to terminal X00 is derived from the order of the entries in the ESI. The assignment per terminal is in the EtherCAT tab.

    Source: Manual chap. 3.3, 7.2.1 step 4, 7.2.3 step 9; ESI V4.04

  8. 8Set startup parametersOptional

    The master writes settings into the module at startup (startup parameters, object 0x8000). In TwinCAT: select the module → Startup tab → New → select the object, enter the value. Then reload the configuration and the program.

    BusFault_Clear/Hold (modules with outputs, 0x8000:01): factory default 0 – on bus failure the module switches the outputs off. With “Hold” they keep their state.

    Analog modules: Range Setting per channel (factory default 0 = ±10 V or 4–20 mA) and, for inputs, a Filter per channel, moving average over 1 to 1024 conversions (factory default 10).

    ParameterValueMeaning
    0x8000:010BusFault_Clear/Hold, factory default: outputs off on bus failure
    Range Setting0per channel, factory default; codes in the EtherCAT tab
    Filter10per analog input, 1–1024 conversions

    The subindexes differ by model, e.g. EC4-A80V: Filter 0x8000:01–08, Range 0x8000:09–10. The list for your model is in the EtherCAT tab.

    Digital input filtering is fixed at 3 ms and cannot be adjusted.

    Source: Manual chap. 3.3, 7.1; ESI V4.04 (object 0x8000)

  9. 9More devices in the lineOptional

    Connect several EC4 and other EtherCAT devices one after the other: OUT of one module to IN of the next. Max. 100 m per segment, shielded cable of category 5 or higher.

    After re-plugging or adding devices, scan again in the master; the order in the line determines the position.

    If a module has no supply, you can no longer reach the devices behind it (derived; the manual does not mention a bypass).

    Show wiring “Another device in the line”

    Solidot patch cable 0.5 m

    Source: Manual chap. 3.1, 6.2

  10. 10TroubleshootingRequired

    LEDs

    LEDStateMeaning
    PWR (green)offno supply or faulty supply
    RUN (green)flashes 5 HzPre-OP
    RUN (green)flashes 2 HzSafe-OP
    RUN (green)offinitialization or no supply
    ERR (red)onerror or special state in the system
    IN/OUT greenoffno network connection
    IN/OUT yellowoffno data exchange

    Module is not found during the scan: ESI file installed correctly, current version, software restarted? (manual chap. 8.1)

    Module does not start operating: check the project, node address (Sysmac), supply and EtherCAT cable; power-cycle after changing the node address (chap. 8.2).

    Source: Manual chap. 4.2, 8

Revision 1.0 · 02.10.2026 · Source: EC4 Series User Manual V1.18 (24.11.2025); ESI EcatTerminal-EC4_V4.04_BOOL.xml (EC4-XML V1.2, 10.04.2026). Menu names as in the English user interface in the manual.. The manufacturer manual and applicable standards take precedence; installation and commissioning by a qualified electrician only.

Dimensions and mounting

All EC4 models are the same size and sit vertically on a 35 mm DIN rail. The drawing is projected from Solidot's 3D models (same housing as PN4 and MT4, shared 3D data “EC4_PN4_MT4”).

Connectors and wires

Supply 24V · 0V · PE (top)

Type
3-pin, spring-clamp
Pitch
5.08 mm*
Size
approx. 9 × 19 mm, 17 mm above the housing*
Cross-section
0.3–1.5 mm² (22–16 AWG)
Strip length
10 mm

Signals (front)

Type
20-pin, two rows of 10 terminals, spring-clamp with push button; one block (16 channels, analog) or two blocks (32 channels and relay modules)
Pitch
3.5 mm*
Size
approx. 13 × 36 mm per block, 16 mm in front of the housing*
Cross-section
0.3–1.0 mm² (22–17 AWG)
Strip length
10 mm

EtherCAT IN/OUT (top)

Type
2 × RJ45 for EtherCAT cables or patch cables Cat. 5 or higher, double-shielded (STP) recommended, max. 100 m

* measured from Solidot's 3D model, not in the manual. We measured the supply connector at ≈ 5.1 mm and assume the standard pitch of 5.08 mm.

Wire ferrules with plastic collar, sleeve length 10 mm: E0310 (0.3 mm²), E0510 (0.5), E7510 (0.75), E1010 (1.0), E1510 (1.5 mm², supply only). Solid wires without ferrule.

Tools: flat-blade screwdriver up to 3 mm to open the spring clamp.

Cross-sections, ferrules and strip length: manual ch. 6.1 and 6.2. Rating as per ch. 6.1: signal terminal 200 V / 9.5 A, supply terminal 320 V / 20 A.

Mounting step by step

  1. 1Choose the installation site

    Protection class IP20: the module belongs in a control cabinet or an enclosure. The cabinet needs good ventilation, e.g. a fan.

    Mount the module vertically so that air flows through the housing. Do not mount it next to or above devices that give off a lot of heat. Operating temperature −10 to +60 °C, humidity up to 95 %, non-condensing.

    At least 10 mm to neighbouring modules, 45 mm upwards and 25 mm downwards to devices or cable ducts. This leaves room at the top for the supply connector and patch cables.

    Show clearances in the drawing

  2. 2Mounting and removing

    Mount and remove only with the power off.

    • Pull the latch at the bottom of the module outwards until it clicks into place.

    • Hook the module onto the top of the DIN rail and swing it onto the rail.

    • Push the latch towards the rail until it clicks.

    • Removing: insert a flat-blade screwdriver into the latch, lever it towards the module and swing the module off.

    Show wiring “System supply 24 V”

  3. 3Connecting the wires

    Strip 10 mm of the wire. Stranded wires get a wire ferrule with a 10 mm sleeve length; solid wires go in directly.

    Press down the push button above the terminal with a flat-blade screwdriver (up to 3 mm), insert the wire, release, give the wire a short pull.

    Signal terminals take 0.3–1.0 mm², the supply terminal 0.3–1.5 mm². Run the supply cable twisted, use shielded pairs for analog signals.

    Show wiring “System supply 24 V”Show wiring “PNP sensors on DI”

Revision 1.0 · 02.10.2026 · Source: EC4 Series User Manual V1.18 (11/2025), ch. 3.1, 5 and 6.1; Solidot 3D models EC4_PN4_MT4_1/_2 V1.00. The manufacturer manual and applicable standards take precedence; installation by a qualified electrician only.

Stuck?

Our support helps you free of charge. Tell us what you are planning and which model you use – via the contact form, by email or in the community forum.

Contact formEmail support@spstiger.deAsk in the community forum

More ways to contact us: Support contacts

We have compiled and checked this page carefully from the manufacturer’s documentation. Even so, an error may have slipped in. The manufacturer’s manual and the applicable standards always take precedence. Spotted something? Let us know – we’ll be glad to fix it.

Downloads

User manual, ESI files, 2D and 3D drawings and EPLAN macros:

Solidot EC4
User manual, ESI files, 2D and 3D drawings and EPLAN macros for the Solidot EC4 series

Solidot EC4 remote I/O

Solidot EC4 – EtherCAT Remote I/O (digital module)
Solidot EC4 – EtherCAT Remote I/O (digital module)
If you want to connect sensors and actuators to a controller in a decentralized way – without running every single wire all the way back to the main control cabinet – the Solidot EC4 series offers a compact EtherCAT remote I/O system. The modules sit right where the signals originate – on the machine or in the field distribution box – and transmit all inputs and outputs to the controller over a single EtherCAT cable. This saves wiring, terminals and space in the central cabinet. 🏭 Typical applications Decentralized machine modules: Each assembly gets its own I/O module, connected via a continuous EtherCAT line – new modules are simply daisy-chained on. Relieve the control cabinet: Instead of hundreds of wires running to the central cabinet, only two RJ45 lines per module are needed. Fewer cable ducts, fewer terminals, a clearer system. Retrofit with an EtherCAT master: Extend existing Beckhoff TwinCAT or CODESYS controllers with decentralized I/O without enlarging the central PLC. Mixed signal types: Digital, analog (current/voltage), relay, temperature or encoder – a suitable module for every signal type from the same building-block system. 🌐 EtherCAT: one cable for all signals EtherCAT transmits the process data of all daisy-chained modules with very low latency over a line topology. Each EC4 module has two RJ45 ports (IN/OUT, 100 Mbps) and is looped through – no additional switch required. The module is read into the master via the EtherCAT device description file (ESI) and is ready to configure immediately. 💡 Working with EtherNet/IP instead of EtherCAT? The same modules are available as the Solidot EI4 series (EtherNet/IP) – same hardware, same building-block system, just a different fieldbus. 🔗 Compatibility As a standard-compliant EtherCAT slave device, the EC4 series works with any EtherCAT master – such as Beckhoff TwinCAT or CODESYS. Integration is vendor-independent via the ESI file. 🔌 Design and connection Removable spring-clamp terminals: Power supply and I/O sit on removable terminal blocks – when replacing a module, the block is simply unplugged and the wiring stays in place. DIN-rail mounting: 35 mm DIN rail, compact housing (102 × 72 × 25 mm), passive cooling – no fan, no maintenance. Power supply: 24 V DC nominal, permissible 18 – 36 V DC. Status via LEDs (PWR, RUN, ERR) on each module. ⚠️ Limitations stated honestly Protection rating IP20 – for a control cabinet or protected enclosure, not for the unprotected field environment. Power supply exclusively 18 – 36 V DC, no AC supply. Operation from -10 °C to +60 °C (passive cooling). Standard process I/O – no functional-safety (safety-rated) inputs/outputs. A separate safety controller is required for emergency stop and similar functions. EC4 modules are slave devices and require an EtherCAT master – they do not replace a controller. 🏷️ Manufacturer and reliability Solidot (s'Dot) specializes in industrial networking and remote I/O technology. The EC4 modules are CE- and RoHS-compliant and built for industrial use; on the analog modules the channels are galvanically isolated (500 V, optocoupler). spstiger offers the series with expert advice and support.
Input and output variants
From €79.76 *

Preis exkl. MwSt., zzgl. Versandkosten

Solidot EC4 – EtherCAT Remote I/O (digital module)
Solidot EC4 – EtherCAT Remote I/O (digital module)
If you want to connect sensors and actuators to a controller in a decentralized way – without running every single wire all the way back to the main control cabinet – the Solidot EC4 series offers a compact EtherCAT remote I/O system. The modules sit right where the signals originate – on the machine or in the field distribution box – and transmit all inputs and outputs to the controller over a single EtherCAT cable. This saves wiring, terminals and space in the central cabinet. 🏭 Typical applications Decentralized machine modules: Each assembly gets its own I/O module, connected via a continuous EtherCAT line – new modules are simply daisy-chained on. Relieve the control cabinet: Instead of hundreds of wires running to the central cabinet, only two RJ45 lines per module are needed. Fewer cable ducts, fewer terminals, a clearer system. Retrofit with an EtherCAT master: Extend existing Beckhoff TwinCAT or CODESYS controllers with decentralized I/O without enlarging the central PLC. Mixed signal types: Digital, analog (current/voltage), relay, temperature or encoder – a suitable module for every signal type from the same building-block system. 🌐 EtherCAT: one cable for all signals EtherCAT transmits the process data of all daisy-chained modules with very low latency over a line topology. Each EC4 module has two RJ45 ports (IN/OUT, 100 Mbps) and is looped through – no additional switch required. The module is read into the master via the EtherCAT device description file (ESI) and is ready to configure immediately. 💡 Working with EtherNet/IP instead of EtherCAT? The same modules are available as the Solidot EI4 series (EtherNet/IP) – same hardware, same building-block system, just a different fieldbus. 🔗 Compatibility As a standard-compliant EtherCAT slave device, the EC4 series works with any EtherCAT master – such as Beckhoff TwinCAT or CODESYS. Integration is vendor-independent via the ESI file. 🔌 Design and connection Removable spring-clamp terminals: Power supply and I/O sit on removable terminal blocks – when replacing a module, the block is simply unplugged and the wiring stays in place. DIN-rail mounting: 35 mm DIN rail, compact housing (102 × 72 × 25 mm), passive cooling – no fan, no maintenance. Power supply: 24 V DC nominal, permissible 18 – 36 V DC. Status via LEDs (PWR, RUN, ERR) on each module. ⚠️ Limitations stated honestly Protection rating IP20 – for a control cabinet or protected enclosure, not for the unprotected field environment. Power supply exclusively 18 – 36 V DC, no AC supply. Operation from -10 °C to +60 °C (passive cooling). Standard process I/O – no functional-safety (safety-rated) inputs/outputs. A separate safety controller is required for emergency stop and similar functions. EC4 modules are slave devices and require an EtherCAT master – they do not replace a controller. 🏷️ Manufacturer and reliability Solidot (s'Dot) specializes in industrial networking and remote I/O technology. The EC4 modules are CE- and RoHS-compliant and built for industrial use; on the analog modules the channels are galvanically isolated (500 V, optocoupler). spstiger offers the series with expert advice and support.
Input and output variants
From €95.95 *

Preis exkl. MwSt., zzgl. Versandkosten

Solidot EC4 – EtherCAT Remote I/O (analog module)
Solidot EC4 – EtherCAT Remote I/O (analog module)
If you want to connect sensors and actuators to a controller in a decentralized way – without running every single wire all the way back to the main control cabinet – the Solidot EC4 series offers a compact EtherCAT remote I/O system. The modules sit right where the signals originate – on the machine or in the field distribution box – and transmit all inputs and outputs to the controller over a single EtherCAT cable. This saves wiring, terminals and space in the central cabinet. 🏭 Typical applications Decentralized machine modules: Each assembly gets its own I/O module, connected via a continuous EtherCAT line – new modules are simply daisy-chained on. Relieve the control cabinet: Instead of hundreds of wires running to the central cabinet, only two RJ45 lines per module are needed. Fewer cable ducts, fewer terminals, a clearer system. Retrofit with an EtherCAT master: Extend existing Beckhoff TwinCAT or CODESYS controllers with decentralized I/O without enlarging the central PLC. Mixed signal types: Digital, analog (current/voltage), relay, temperature or encoder – a suitable module for every signal type from the same building-block system. 🌐 EtherCAT: one cable for all signals EtherCAT transmits the process data of all daisy-chained modules with very low latency over a line topology. Each EC4 module has two RJ45 ports (IN/OUT, 100 Mbps) and is looped through – no additional switch required. The module is read into the master via the EtherCAT device description file (ESI) and is ready to configure immediately. 💡 Working with EtherNet/IP instead of EtherCAT? The same modules are available as the Solidot EI4 series (EtherNet/IP) – same hardware, same building-block system, just a different fieldbus. 🔗 Compatibility As a standard-compliant EtherCAT slave device, the EC4 series works with any EtherCAT master – such as Beckhoff TwinCAT or CODESYS. Integration is vendor-independent via the ESI file. 🔌 Design and connection Removable spring-clamp terminals: Power supply and I/O sit on removable terminal blocks – when replacing a module, the block is simply unplugged and the wiring stays in place. DIN-rail mounting: 35 mm DIN rail, compact housing (102 × 72 × 25 mm), passive cooling – no fan, no maintenance. Power supply: 24 V DC nominal, permissible 18 – 36 V DC. Status via LEDs (PWR, RUN, ERR) on each module. ⚠️ Limitations stated honestly Protection rating IP20 – for a control cabinet or protected enclosure, not for the unprotected field environment. Power supply exclusively 18 – 36 V DC, no AC supply. Operation from -10 °C to +60 °C (passive cooling). Standard process I/O – no functional-safety (safety-rated) inputs/outputs. A separate safety controller is required for emergency stop and similar functions. EC4 modules are slave devices and require an EtherCAT master – they do not replace a controller. 🏷️ Manufacturer and reliability Solidot (s'Dot) specializes in industrial networking and remote I/O technology. The EC4 modules are CE- and RoHS-compliant and built for industrial use; on the analog modules the channels are galvanically isolated (500 V, optocoupler). spstiger offers the series with expert advice and support.
Input and output variants
From €146.81 *

Preis exkl. MwSt., zzgl. Versandkosten

Solidot EC4 – EtherCAT Remote I/O (analog module)
Solidot EC4 – EtherCAT Remote I/O (analog module)
If you want to connect sensors and actuators to a controller in a decentralized way – without running every single wire all the way back to the main control cabinet – the Solidot EC4 series offers a compact EtherCAT remote I/O system. The modules sit right where the signals originate – on the machine or in the field distribution box – and transmit all inputs and outputs to the controller over a single EtherCAT cable. This saves wiring, terminals and space in the central cabinet. 🏭 Typical applications Decentralized machine modules: Each assembly gets its own I/O module, connected via a continuous EtherCAT line – new modules are simply daisy-chained on. Relieve the control cabinet: Instead of hundreds of wires running to the central cabinet, only two RJ45 lines per module are needed. Fewer cable ducts, fewer terminals, a clearer system. Retrofit with an EtherCAT master: Extend existing Beckhoff TwinCAT or CODESYS controllers with decentralized I/O without enlarging the central PLC. Mixed signal types: Digital, analog (current/voltage), relay, temperature or encoder – a suitable module for every signal type from the same building-block system. 🌐 EtherCAT: one cable for all signals EtherCAT transmits the process data of all daisy-chained modules with very low latency over a line topology. Each EC4 module has two RJ45 ports (IN/OUT, 100 Mbps) and is looped through – no additional switch required. The module is read into the master via the EtherCAT device description file (ESI) and is ready to configure immediately. 💡 Working with EtherNet/IP instead of EtherCAT? The same modules are available as the Solidot EI4 series (EtherNet/IP) – same hardware, same building-block system, just a different fieldbus. 🔗 Compatibility As a standard-compliant EtherCAT slave device, the EC4 series works with any EtherCAT master – such as Beckhoff TwinCAT or CODESYS. Integration is vendor-independent via the ESI file. 🔌 Design and connection Removable spring-clamp terminals: Power supply and I/O sit on removable terminal blocks – when replacing a module, the block is simply unplugged and the wiring stays in place. DIN-rail mounting: 35 mm DIN rail, compact housing (102 × 72 × 25 mm), passive cooling – no fan, no maintenance. Power supply: 24 V DC nominal, permissible 18 – 36 V DC. Status via LEDs (PWR, RUN, ERR) on each module. ⚠️ Limitations stated honestly Protection rating IP20 – for a control cabinet or protected enclosure, not for the unprotected field environment. Power supply exclusively 18 – 36 V DC, no AC supply. Operation from -10 °C to +60 °C (passive cooling). Standard process I/O – no functional-safety (safety-rated) inputs/outputs. A separate safety controller is required for emergency stop and similar functions. EC4 modules are slave devices and require an EtherCAT master – they do not replace a controller. 🏷️ Manufacturer and reliability Solidot (s'Dot) specializes in industrial networking and remote I/O technology. The EC4 modules are CE- and RoHS-compliant and built for industrial use; on the analog modules the channels are galvanically isolated (500 V, optocoupler). spstiger offers the series with expert advice and support.
Input and output variants
From €193.05 *

Preis exkl. MwSt., zzgl. Versandkosten

Solidot EC4 – EtherCAT Remote I/O (relay module)
Solidot EC4 – EtherCAT Remote I/O (relay module)
If you want to connect sensors and actuators to a controller in a decentralized way – without running every single wire all the way back to the main control cabinet – the Solidot EC4 series offers a compact EtherCAT remote I/O system. The modules sit right where the signals originate – on the machine or in the field distribution box – and transmit all inputs and outputs to the controller over a single EtherCAT cable. This saves wiring, terminals and space in the central cabinet. 🏭 Typical applications Decentralized machine modules: Each assembly gets its own I/O module, connected via a continuous EtherCAT line – new modules are simply daisy-chained on. Relieve the control cabinet: Instead of hundreds of wires running to the central cabinet, only two RJ45 lines per module are needed. Fewer cable ducts, fewer terminals, a clearer system. Retrofit with an EtherCAT master: Extend existing Beckhoff TwinCAT or CODESYS controllers with decentralized I/O without enlarging the central PLC. Mixed signal types: Digital, analog (current/voltage), relay, temperature or encoder – a suitable module for every signal type from the same building-block system. 🌐 EtherCAT: one cable for all signals EtherCAT transmits the process data of all daisy-chained modules with very low latency over a line topology. Each EC4 module has two RJ45 ports (IN/OUT, 100 Mbps) and is looped through – no additional switch required. The module is read into the master via the EtherCAT device description file (ESI) and is ready to configure immediately. 🔗 Compatibility As a standard-compliant EtherCAT slave device, the EC4 series works with any EtherCAT master – such as Beckhoff TwinCAT or CODESYS. Integration is vendor-independent via the ESI file. 🔌 Design and connection Removable spring-clamp terminals: Power supply and I/O sit on removable terminal blocks – when replacing a module, the block is simply unplugged and the wiring stays in place. DIN-rail mounting: 35 mm DIN rail, compact housing (102 × 72 × 25 mm), passive cooling – no fan, no maintenance. Power supply: 24 V DC nominal, permissible 18 – 36 V DC. Status via LEDs (PWR, RUN, ERR) on each module. ⚠️ Limitations stated honestly Protection rating IP20 – for a control cabinet or protected enclosure, not for the unprotected field environment. Power supply exclusively 18 – 36 V DC, no AC supply. Operation from -10 °C to +60 °C (passive cooling). Standard process I/O – no functional-safety (safety-rated) inputs/outputs. A separate safety controller is required for emergency stop and similar functions. EC4 modules are slave devices and require an EtherCAT master – they do not replace a controller. 🏷️ Manufacturer and reliability Solidot (s'Dot) specializes in industrial networking and remote I/O technology. The EC4 modules are CE- and RoHS-compliant and built for industrial use; on the analog modules the channels are galvanically isolated (500 V, optocoupler). spstiger offers the series with expert advice and support.
Input and output variants
From €108.66 *

Preis exkl. MwSt., zzgl. Versandkosten

Accessories

Solidot Patchkabel RJ45/RJ45 – geschirmt, grün
Solidot Patchkabel RJ45/RJ45 – geschirmt, grün
Assembled, shielded Ethernet cables for the fieldbus wiring of Solidot remote I/O modules — RJ45 on both ends, green jacket per industry convention. Available in seven lengths from 0.5 to 20 m and two jacket materials. 🔌 What for Connection between PLC and remote I/O module, and for daisy-chaining module to module (2 × RJ45 per module, no switch required). Protocol-neutral: PROFINET (PN4, PN5R, PN7A), EtherCAT (EC4, EC5R, EC7A), EtherNet/IP (EI4) and Modbus TCP (MT4). 🧵 PVC or PUR — which one PVC: the more economical choice for fixed installation in the cabinet and in cable ducts. PUR: tougher, more abrasion-resistant and oil-resistant — for moving installation, machine environments and anything that does not just sit in the cabinet. 📐 Technical basis CAT 5e, shielded, 100 Mbps — matching the Ethernet interface of the Solidot modules. Maximum cable length between two stations: 100 m (fieldbus specification). Lengths: 0.5 · 1 · 2 · 3 · 5 · 10 · 20 m. Custom lengths are available from the manufacturer on request — get in touch if you need one. ⚠️ Limits stated honestly RJ45 is an IP20 connector — for control cabinets and protected enclosures. In the field with splash water or dust, M12 cables (D-coded) are the right choice. CAT 5e, not CAT 6/CAT 6a. Not meant for gigabit backbones — the Solidot modules operate at 100 Mbps anyway.
Cable length
+1
Cable material
From €7.35 *

Preis exkl. MwSt., zzgl. Versandkosten

Details
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