Remote I/O modules with Modbus TCP bus coupler
Solidot Modbus TCP remote I/O module MT4 with 16 digital channels
From
€88.00 *
You need 16 digital signals at a spot where there is a network cable but no controller — and you do not want to build a fieldbus, a bus coupler and half a cabinet for it. The MT4 connects directly to your Ethernet as a Modbus TCP device: electronics, two network ports and terminals sit in one housing 25 mm wide.
🏭 Typical applications
Signals over Ethernet instead of a fieldbus: wherever a network is already in place, you bring limit switches, photoelectric sensors and valves into the controller over the existing Ethernet — no separate fieldbus system needed.
Machine retrofit: keep the existing controller and add the missing inputs and outputs via Modbus TCP, without wiring back to the main cabinet.
Distributed systems: daisy-chain several modules through the two RJ45 ports and save an additional network switch.
🔌 Versions with 16 channels
MT4-1600B: 16 digital inputs, PNP, 24 V DC
MT4-0016B: 16 digital transistor outputs, PNP
MT4-0808B: 8 inputs and 8 outputs in the same housing
All inputs and outputs run on 24 V DC in PNP technology and are optically isolated. The outputs are transistor outputs for resistive and inductive loads.
⚙️ Core specifications
Bus: Modbus TCP server (slave), 2 × RJ45 with integrated switch, 10/100 Mbit/s, daisy chain without an external switch
Function codes: 0x01, 0x02, 0x03, 0x0F and 0x10 for reading and writing coils and registers
Power supply: 24 V DC, current consumption ≤ 50 mA
Environment: 0 °C to +55 °C operating, 5 % – 95 % relative humidity without condensation, IP20
Form factor: 102 × 72 × 25 mm, 35 mm DIN rail, pluggable push-in spring terminals
Diagnostics: a green LED next to every channel
🔗 Compatibility
The MT4 registers as an ordinary Modbus TCP server and therefore works with practically any Modbus TCP master — a CODESYS controller, a PLC with Modbus TCP client, an HMI or PC software. Integration into CODESYS V3.5 is documented step by step in the manual, including channel mapping. No device description file, no vendor software, no licence.
🔧 Mounting and commissioning
The module clips onto a 35 mm DIN rail. The terminal blocks are pluggable — you wire them up in the cabinet and plug them on afterwards. The MT4 is configured entirely in the web browser: IP address, connection timeout and the behaviour of the outputs when the connection is lost (clear or hold). Its factory IP address is 192.168.1.120; the reset button takes you back to that state at any time.
🏷️ Manufacturer and availability
Solidot (Nanjing Solidot Electronic Technology) has been building remote I/O and fieldbus components for industrial series use for years. The MT4 carries the CE mark and is the Modbus TCP sibling of EC4 (EtherCAT), EI4 (EtherNet/IP), PN4 (PROFINET) and CC4 (CC-Link) — same housing, same terminals, just a different bus. spstiger is the importer of the series in the EU; technical questions are answered by us directly, without a detour via the manufacturer.
- Min. 1 Variant available.
- Delivery Time : 3 bis 5 Tage
- Product Benefits 1: Modbus TCP server (slave)
- Product Benefits 2: Compact
- Product Benefits 3: 16 Digital I/O
Available in 14 days, delivery time 3 bis 5 Tage
Preis exkl. MwSt., zzgl. Versandkosten
Solidot Modbus TCP remote I/O module MT4 with 32 digital channels
From
€119.20 *
You need 32 digital signals at a spot where there is a network cable but no controller — and you do not want to build a fieldbus, a bus coupler and half a cabinet for it. The MT4 connects directly to your Ethernet as a Modbus TCP device: electronics, two network ports and terminals sit in one housing 25 mm wide.
🏭 Typical applications
Signals over Ethernet instead of a fieldbus: wherever a network is already in place, you bring limit switches, photoelectric sensors and valves into the controller over the existing Ethernet — no separate fieldbus system needed.
Machine retrofit: keep the existing controller and add the missing inputs and outputs via Modbus TCP, without wiring back to the main cabinet.
Distributed systems: daisy-chain several modules through the two RJ45 ports and save an additional network switch.
🔌 Versions with 32 channels
MT4-3200B: 32 digital inputs, PNP, 24 V DC
MT4-0032B: 32 digital transistor outputs, PNP
MT4-1616B: 16 inputs and 16 outputs in the same housing
All inputs and outputs run on 24 V DC in PNP technology and are optically isolated. The outputs are transistor outputs for resistive and inductive loads.
⚙️ Core specifications
Bus: Modbus TCP server (slave), 2 × RJ45 with integrated switch, 10/100 Mbit/s, daisy chain without an external switch
Function codes: 0x01, 0x02, 0x03, 0x0F and 0x10 for reading and writing coils and registers
Power supply: 24 V DC, current consumption ≤ 50 mA
Environment: 0 °C to +55 °C operating, 5 % – 95 % relative humidity without condensation, IP20
Form factor: 102 × 72 × 25 mm, 35 mm DIN rail, pluggable push-in spring terminals
Diagnostics: a green LED next to every channel
🔗 Compatibility
The MT4 registers as an ordinary Modbus TCP server and therefore works with practically any Modbus TCP master — a CODESYS controller, a PLC with Modbus TCP client, an HMI or PC software. Integration into CODESYS V3.5 is documented step by step in the manual, including channel mapping. No device description file, no vendor software, no licence.
🔧 Mounting and commissioning
The module clips onto a 35 mm DIN rail. The terminal blocks are pluggable — you wire them up in the cabinet and plug them on afterwards. The MT4 is configured entirely in the web browser: IP address, connection timeout and the behaviour of the outputs when the connection is lost (clear or hold). Its factory IP address is 192.168.1.120; the reset button takes you back to that state at any time.
🏷️ Manufacturer and availability
Solidot (Nanjing Solidot Electronic Technology) has been building remote I/O and fieldbus components for industrial series use for years. The MT4 carries the CE mark and is the Modbus TCP sibling of EC4 (EtherCAT), EI4 (EtherNet/IP), PN4 (PROFINET) and CC4 (CC-Link) — same housing, same terminals, just a different bus. spstiger is the importer of the series in the EU; technical questions are answered by us directly, without a detour via the manufacturer.
- Min. 1 Variant available.
- Delivery Time : 3 bis 5 Tage
- Product Benefits 1: Modbus TCP server (slave)
- Product Benefits 2: Compact
- Product Benefits 3: 32 Digital I/O
Available in 14 days, delivery time 3 bis 5 Tage
Preis exkl. MwSt., zzgl. Versandkosten
Solidot XB6S-MT2002 Modbus-TCP bus coupler
From
€115.20 *
The Solidot XB6S bus coupler is the head module of the XB6S slice series: it connects your controller to the attached XB6S input and output modules over the industrial fieldbus. The I/O modules plug onto the backplane bus, are detected automatically and supplied cyclically – so you build a decentralised I/O island close to the field instead of wiring every signal back to the PLC.🏭 Typical applicationsMachine and plant building: compact I/O islands right at the machine, connected via the existing fieldbus.Conveyor and intralogistics: distributed sensors and actuators along long runs, without star wiring back to the central controller.Packaging and special machinery: fast, deterministic I/O – up to motion-grade depending on the protocol.Retrofit: extend existing plants with decentralised I/O, matched to the installed control system.⚙️ Key specificationsTwo Ethernet ports 10/100 (RJ45), daisy-chain capable for line topology.Up to 32 XB6S expansion modules on the backplane bus, automatic detection.24 V DC supply (permissible 18 – 36 V DC), input current 600 mA, passive cooling.Configuration via the built-in web browser access, IP20, −20 to +60 °C.Pluggable spring terminals, compact 106 × 43 × 61 mm.🌐 Protocol variantsThe coupler is available with different fieldbuses to match your control world: PROFINET, EtherCAT, EtherNet/IP or Modbus TCP. All variants use the same hardware platform and the same XB6S module range – you just pick the protocol that fits your controller.🧩 Which variant?PROFINET – for Siemens controllers and most European PLC worlds.EtherCAT – for Beckhoff and CODESYS systems, fast and deterministic applications.EtherNet/IP – for Rockwell/Allen-Bradley environments.Modbus TCP – vendor-neutral, ideal for SCADA, gateways and simple integration.🔧 Mounting and dimensions35 mm DIN rail, dimensions 106 × 43 × 61 mm. Snap on without tools, attach I/O modules to the right.🏷️ Manufacturer and reliabilitySolidot (Nanjing Solidot Electronic Technology) specialises in decentralised I/O and fieldbus technology. The XB6S series is designed for continuous industrial use in Europe, CE-marked and RoHS-compliant.
- Available
- Delivery Time : 3 bis 5 Tage
Variants from €101.12 *
Available in 14 days, delivery time 3 bis 5 Tage
Preis exkl. MwSt., zzgl. Versandkosten
Solidot Modbus TCP remote I/O module MT4 with 4 analog channels
From
€171.20 *
You want to capture or output 4 analog signals where they occur — and provide them over the existing Ethernet, without a fieldbus or an extra analog card in the main cabinet. The MT4 analog module packs electronics, two network ports and 4 channels into one housing 25 mm wide, available as voltage or current version.
🏭 Typical applications
Process values onto the network: read pressure transmitters, level probes or flow meters on site and provide them as registers via Modbus TCP — for the PLC, the HMI or a control system.
Setpoints for drives and valves: set speed or position via 0 – 10 V or 4 – 20 mA without routing an analog channel back to the main cabinet.
Data acquisition on a PC: bring measured values straight into a PC application or data-logging system that speaks Modbus TCP — no PLC required.
🔌 Versions with 4 channels
MT4-A40V: 4 analog voltage inputs: −10 V to +10 V, −5 V to +5 V, 0 – 10 V or 1 – 5 V
MT4-A40I: 4 analog current inputs: 4 – 20 mA or 0 – 20 mA
MT4-A04V: 4 analog voltage outputs: −10 V to +10 V, −5 V to +5 V, 0 – 10 V or 1 – 5 V
MT4-A04I: 4 analog current outputs: 4 – 20 mA or 0 – 20 mA
The channels have a resolution of 16 bit. You select the range per channel; the values are available as Modbus registers.
⚙️ Core specifications
Bus: Modbus TCP server (slave), 2 × RJ45 with integrated switch, 10/100 Mbit/s, daisy chain without an external switch
Function codes: 0x01, 0x02, 0x03, 0x0F and 0x10 for reading and writing coils and registers
Power supply: 24 V DC, current consumption ≤ 50 mA
Environment: 0 °C to +55 °C operating, 5 % – 95 % relative humidity without condensation, IP20
Form factor: 102 × 72 × 25 mm, 35 mm DIN rail, pluggable push-in spring terminals
Diagnostics: a green LED next to every channel
🔗 Compatibility
The MT4 registers as an ordinary Modbus TCP server and therefore works with practically any Modbus TCP master — a CODESYS controller, a PLC with Modbus TCP client, an HMI or PC software. Integration into CODESYS V3.5 is documented step by step in the manual, including channel mapping. No device description file, no vendor software, no licence.
🔧 Mounting and commissioning
The module clips onto a 35 mm DIN rail. The terminal blocks are pluggable — you wire them up in the cabinet and plug them on afterwards. The MT4 is configured entirely in the web browser: IP address, connection timeout and the behaviour of the outputs when the connection is lost (clear or hold). Its factory IP address is 192.168.1.120; the reset button takes you back to that state at any time.
🏷️ Manufacturer and availability
Solidot (Nanjing Solidot Electronic Technology) has been building remote I/O and fieldbus components for industrial series use for years. The MT4 carries the CE mark and is the Modbus TCP sibling of EC4 (EtherCAT), EI4 (EtherNet/IP), PN4 (PROFINET) and CC4 (CC-Link) — same housing, same terminals, just a different bus. spstiger is the importer of the series in the EU; technical questions are answered by us directly, without a detour via the manufacturer.
- Min. 1 Variant available.
- Delivery Time : 3 bis 5 Tage
- Product Benefits 1: Modbus TCP server (slave)
- Product Benefits 2: Compact
- Product Benefits 3: 4 Analog I/O
Available in 14 days, delivery time 3 bis 5 Tage
Preis exkl. MwSt., zzgl. Versandkosten
Solidot XB6S-PN2002 Coupler kit 2A version
From
€126.72 *
The Solidot XB6S bus coupler is the head module of the XB6S slice series: it connects your controller to the attached XB6S input and output modules over the industrial fieldbus. The I/O modules plug onto the backplane bus, are detected automatically and supplied cyclically – so you build a decentralised I/O island close to the field instead of wiring every signal back to the PLC.🏭 Typical applicationsMachine and plant building: compact I/O islands right at the machine, connected via the existing fieldbus.Conveyor and intralogistics: distributed sensors and actuators along long runs, without star wiring back to the central controller.Packaging and special machinery: fast, deterministic I/O – up to motion-grade depending on the protocol.Retrofit: extend existing plants with decentralised I/O, matched to the installed control system.⚙️ Key specificationsTwo Ethernet ports 10/100 (RJ45), daisy-chain capable for line topology.Up to 32 XB6S expansion modules on the backplane bus, automatic detection.24 V DC supply (permissible 18 – 36 V DC), input current 600 mA, passive cooling.Configuration via the built-in web browser access, IP20, −20 to +60 °C.Pluggable spring terminals, compact 106 × 43 × 61 mm.🌐 Protocol variantsThe coupler is available with different fieldbuses to match your control world: PROFINET, EtherCAT, EtherNet/IP or Modbus TCP. All variants use the same hardware platform and the same XB6S module range – you just pick the protocol that fits your controller.🧩 Which variant?PROFINET – for Siemens controllers and most European PLC worlds.EtherCAT – for Beckhoff and CODESYS systems, fast and deterministic applications.EtherNet/IP – for Rockwell/Allen-Bradley environments.Modbus TCP – vendor-neutral, ideal for SCADA, gateways and simple integration.🔧 Mounting and dimensions35 mm DIN rail, dimensions 106 × 43 × 61 mm. Snap on without tools, attach I/O modules to the right.🏷️ Manufacturer and reliabilitySolidot (Nanjing Solidot Electronic Technology) specialises in decentralised I/O and fieldbus technology. The XB6S series is designed for continuous industrial use in Europe, CE-marked and RoHS-compliant.
- Available
- Delivery Time : 3 bis 5 Tage
Variants from €101.12 *
Available, delivery time: 3 bis 5 Tage
Preis exkl. MwSt., zzgl. Versandkosten
Solidot Modbus TCP remote I/O module MT4 with 8 analog channels
From
€233.60 *
You want to capture or output 8 analog signals where they occur — and provide them over the existing Ethernet, without a fieldbus or an extra analog card in the main cabinet. The MT4 analog module packs electronics, two network ports and 8 channels into one housing 25 mm wide, available as voltage or current version.
🏭 Typical applications
Process values onto the network: read pressure transmitters, level probes or flow meters on site and provide them as registers via Modbus TCP — for the PLC, the HMI or a control system.
Setpoints for drives and valves: set speed or position via 0 – 10 V or 4 – 20 mA without routing an analog channel back to the main cabinet.
Data acquisition on a PC: bring measured values straight into a PC application or data-logging system that speaks Modbus TCP — no PLC required.
🔌 Versions with 8 channels
MT4-A80V: 8 analog voltage inputs: −10 V to +10 V, −5 V to +5 V, 0 – 10 V or 1 – 5 V
MT4-A80I: 8 analog current inputs: 4 – 20 mA or 0 – 20 mA
MT4-A08V: 8 analog voltage outputs: −10 V to +10 V, −5 V to +5 V, 0 – 10 V or 1 – 5 V
MT4-A08I: 8 analog current outputs: 4 – 20 mA or 0 – 20 mA
The channels have a resolution of 16 bit. You select the range per channel; the values are available as Modbus registers.
⚙️ Core specifications
Bus: Modbus TCP server (slave), 2 × RJ45 with integrated switch, 10/100 Mbit/s, daisy chain without an external switch
Function codes: 0x01, 0x02, 0x03, 0x0F and 0x10 for reading and writing coils and registers
Power supply: 24 V DC, current consumption ≤ 50 mA
Environment: 0 °C to +55 °C operating, 5 % – 95 % relative humidity without condensation, IP20
Form factor: 102 × 72 × 25 mm, 35 mm DIN rail, pluggable push-in spring terminals
Diagnostics: a green LED next to every channel
🔗 Compatibility
The MT4 registers as an ordinary Modbus TCP server and therefore works with practically any Modbus TCP master — a CODESYS controller, a PLC with Modbus TCP client, an HMI or PC software. Integration into CODESYS V3.5 is documented step by step in the manual, including channel mapping. No device description file, no vendor software, no licence.
🔧 Mounting and commissioning
The module clips onto a 35 mm DIN rail. The terminal blocks are pluggable — you wire them up in the cabinet and plug them on afterwards. The MT4 is configured entirely in the web browser: IP address, connection timeout and the behaviour of the outputs when the connection is lost (clear or hold). Its factory IP address is 192.168.1.120; the reset button takes you back to that state at any time.
🏷️ Manufacturer and availability
Solidot (Nanjing Solidot Electronic Technology) has been building remote I/O and fieldbus components for industrial series use for years. The MT4 carries the CE mark and is the Modbus TCP sibling of EC4 (EtherCAT), EI4 (EtherNet/IP), PN4 (PROFINET) and CC4 (CC-Link) — same housing, same terminals, just a different bus. spstiger is the importer of the series in the EU; technical questions are answered by us directly, without a detour via the manufacturer.
- Min. 1 Variant available.
- Delivery Time : 3 bis 5 Tage
- Product Benefits 1: Modbus TCP server (slave)
- Product Benefits 2: Compact
- Product Benefits 3: 8 Analog I/O
Available in 14 days, delivery time 3 bis 5 Tage
Preis exkl. MwSt., zzgl. Versandkosten
Solidot Modbus-TCP bus coupler for XB6 remote I/O with power supply unit and end cap
From
€129.28 *
⚠️ Remaining stock. The XB6 series is being phased out. Its successor is the XB6S coupler kit from the XB6S series. While stock lasts you can still get XB6 — for extending an existing installation that is often exactly what you want, because coupler and modules have to match.
🔌 Bus coupler with power module and end capThe coupler is the head of an XB6 station: it talks to the controller over the fieldbus and supplies the attached I/O modules through the 5 V backplane. Power module and end cap are included. Available for EtherCAT, EtherNet/IP, Modbus TCP, PROFIBUS DP and PROFINET — the modules behind it stay the same in every case.
⚙️ Series characteristics5 V backplane bus, supplied with 18 – 36 V DC through the power module in the coupler kit-10 °C to +60 °C operating, -20 °C to +75 °C storage, 95 % relative humidity without condensation, IP2035 mm DIN rail, pluggable spring-loaded terminals, a green LED next to every channelModule 106 x 73 x 25.7 mm, coupler and power module 106 x 61 x 22.5 mm
Technically XB6 is not a risk: the series has been in the field for years, the modules are mature and the documentation is complete. Manuals, GSDML, ESI and EDS files, EPLAN macros and 2D and 3D models are in the downloads section of this page.
- Available
- Delivery Time : 3 bis 5 Tage
- Product Benefits 1: Remaining stock
- Product Benefits 2: 5 coupler versions
- Product Benefits 3: Power module and cap included
- Product Benefits 4: 5 V backplane bus
- Product Benefits 5: -10 °C to +60 °C
Variants from €112.64 *
Available, delivery time: 3 bis 5 Tage
Preis exkl. MwSt., zzgl. Versandkosten
Solidot XB6S-EC2002 EtherCAT Bus Coupler
The Solidot XB6S bus coupler is the head module of the XB6S slice series: it connects your controller to the attached XB6S input and output modules over the industrial fieldbus. The I/O modules plug onto the backplane bus, are detected automatically and supplied cyclically – so you build a decentralised I/O island close to the field instead of wiring every signal back to the PLC.🏭 Typical applicationsMachine and plant building: compact I/O islands right at the machine, connected via the existing fieldbus.Conveyor and intralogistics: distributed sensors and actuators along long runs, without star wiring back to the central controller.Packaging and special machinery: fast, deterministic I/O – up to motion-grade depending on the protocol.Retrofit: extend existing plants with decentralised I/O, matched to the installed control system.⚙️ Key specificationsTwo Ethernet ports 10/100 (RJ45), daisy-chain capable for line topology.Up to 32 XB6S expansion modules on the backplane bus, automatic detection.24 V DC supply (permissible 18 – 36 V DC), input current 600 mA, passive cooling.Configuration via the built-in web browser access, IP20, −20 to +60 °C.Pluggable spring terminals, compact 106 × 43 × 61 mm.🌐 Protocol variantsThe coupler is available with different fieldbuses to match your control world: PROFINET, EtherCAT, EtherNet/IP or Modbus TCP. All variants use the same hardware platform and the same XB6S module range – you just pick the protocol that fits your controller.🧩 Which variant?PROFINET – for Siemens controllers and most European PLC worlds.EtherCAT – for Beckhoff and CODESYS systems, fast and deterministic applications.EtherNet/IP – for Rockwell/Allen-Bradley environments.Modbus TCP – vendor-neutral, ideal for SCADA, gateways and simple integration.🔧 Mounting and dimensions35 mm DIN rail, dimensions 106 × 43 × 61 mm. Snap on without tools, attach I/O modules to the right.🏷️ Manufacturer and reliabilitySolidot (Nanjing Solidot Electronic Technology) specialises in decentralised I/O and fieldbus technology. The XB6S series is designed for continuous industrial use in Europe, CE-marked and RoHS-compliant.
- Available
- Delivery Time : 3 bis 5 Tage
Solidot Profinet bus coupler for XB6 remote I/O with power supply unit and end cap
From
€142.08 *
⚠️ Remaining stock. The XB6 series is being phased out. Its successor is the XB6S coupler kit from the XB6S series. While stock lasts you can still get XB6 — for extending an existing installation that is often exactly what you want, because coupler and modules have to match.
🔌 Bus coupler with power module and end capThe coupler is the head of an XB6 station: it talks to the controller over the fieldbus and supplies the attached I/O modules through the 5 V backplane. Power module and end cap are included. Available for EtherCAT, EtherNet/IP, Modbus TCP, PROFIBUS DP and PROFINET — the modules behind it stay the same in every case.
⚙️ Series characteristics5 V backplane bus, supplied with 18 – 36 V DC through the power module in the coupler kit-10 °C to +60 °C operating, -20 °C to +75 °C storage, 95 % relative humidity without condensation, IP2035 mm DIN rail, pluggable spring-loaded terminals, a green LED next to every channelModule 106 x 73 x 25.7 mm, coupler and power module 106 x 61 x 22.5 mm
Technically XB6 is not a risk: the series has been in the field for years, the modules are mature and the documentation is complete. Manuals, GSDML, ESI and EDS files, EPLAN macros and 2D and 3D models are in the downloads section of this page.
- Available
- Delivery Time : 3 bis 5 Tage
- Product Benefits 1: Remaining stock
- Product Benefits 2: 5 coupler versions
- Product Benefits 3: Power module and cap included
- Product Benefits 4: 5 V backplane bus
- Product Benefits 5: -10 °C to +60 °C
Variants from €112.64 *
Available, delivery time: 3 bis 5 Tage
Preis exkl. MwSt., zzgl. Versandkosten
Solidot MT4-88B40I mixed Modbus TCP remote I/O module – 8 DI, 8 DO (PNP) & 4 AI (4–20 mA)
Want to bring sensors and actuators into your control system over Ethernet without building an expensive fieldbus? The Solidot MT4-88B40I combines digital and analog I/O in one compact DIN-rail module and joins your network directly as a Modbus TCP node. One card, three signal types – and the master of your choice.
🏭 Typical applications
Machine retrofit: Keep your existing controller and simply add the missing inputs and outputs over Ethernet – no wiring marathon back to the cabinet.
Distributed signal acquisition: Capture switches, limit sensors and indicators via 8 digital inputs; switch valves, contactors and lamps via 8 digital outputs.
Analog measurements: Read 4 current loops (4–20 mA) from pressure, level or temperature sensors – ideal for process and plant engineering.
Distributed plants: Use the two Ethernet ports to daisy-chain multiple modules and save a long cable run back to the cabinet.
🔌 I/O configuration
8 digital inputs, 24 V DC, PNP, 3 ms input filter, optocoupler isolation (500 V AC)
8 digital outputs, 24 V DC, PNP, max. 0.5 A per channel, resistive and inductive loads, with over-voltage and over-current protection
4 analog inputs, current signal 4–20 mA / 0–20 mA, 16-bit resolution, ±0.1 % accuracy
Channel-level green status LEDs: the state of every channel can be read right at the terminal block – diagnostics without a meter.
🌐 Modbus TCP with built-in switch
The module operates as a Modbus TCP server (slave) and works with virtually any Modbus TCP master. Two RJ45 ports with an integrated switch (100 Mbps) let you daisy-chain several devices without an additional network switch. Function codes 0x01, 0x02, 0x03, 0x0F and 0x10 are supported for reading and writing coils and registers.
🔗 Master compatibility
As a standard Modbus TCP node, the MT4-88B40I runs with common controllers and software environments. Integration with CODESYS V3.5 is documented step by step in the manual – including channel mapping for digital inputs, digital outputs and analog inputs as well as range configuration.
🔧 Mounting and commissioning
Snap mounting on 35 mm DIN rail, vertical installation, IP20 protection (cabinet/indoor)
Screwless push-in spring terminals, operated with a flat screwdriver ≤ 3 mm, strip length 10 mm
Full configuration via web browser: IP address, connection timeout and output behaviour on connection loss (clear/hold) are configurable
Factory IP 192.168.1.120, reset button; supply 24 V DC (18 – 30 V), approx. 130 g, 102 × 72 × 25 mm
🏷️ Manufacturer and reliability
Solidot (Nanjing Solidot Electronic Technology) develops compact remote I/O and fieldbus modules for industrial automation. The MT4-88B40I carries the CE marking and is designed for cabinet installation in Europe. At spstiger the MT4 series is available as a complete family – from purely digital to purely analog and mixed modules like this one.
- Available
- Delivery Time : 3 bis 5 Tage
- Product Benefits 1: Modbus TCP Server (Slave)
- Product Benefits 2: 8 DI / 8 DO PNP, 0.5 A
- Product Benefits 3: 4 analog inputs 4–20 mA
- Product Benefits 4: 2 x Ethernet (RJ45)
Solidot XB6S-EI2002 Coupler kit 2A version
€158.40 *
The Solidot XB6S bus coupler is the head module of the XB6S slice series: it connects your controller to the attached XB6S input and output modules over the industrial fieldbus. The I/O modules plug onto the backplane bus, are detected automatically and supplied cyclically – so you build a decentralised I/O island close to the field instead of wiring every signal back to the PLC.🏭 Typical applicationsMachine and plant building: compact I/O islands right at the machine, connected via the existing fieldbus.Conveyor and intralogistics: distributed sensors and actuators along long runs, without star wiring back to the central controller.Packaging and special machinery: fast, deterministic I/O – up to motion-grade depending on the protocol.Retrofit: extend existing plants with decentralised I/O, matched to the installed control system.⚙️ Key specificationsTwo Ethernet ports 10/100 (RJ45), daisy-chain capable for line topology.Up to 32 XB6S expansion modules on the backplane bus, automatic detection.24 V DC supply (permissible 18 – 36 V DC), input current 600 mA, passive cooling.Configuration via the built-in web browser access, IP20, −20 to +60 °C.Pluggable spring terminals, compact 106 × 43 × 61 mm.🌐 Protocol variantsThe coupler is available with different fieldbuses to match your control world: PROFINET, EtherCAT, EtherNet/IP or Modbus TCP. All variants use the same hardware platform and the same XB6S module range – you just pick the protocol that fits your controller.🧩 Which variant?PROFINET – for Siemens controllers and most European PLC worlds.EtherCAT – for Beckhoff and CODESYS systems, fast and deterministic applications.EtherNet/IP – for Rockwell/Allen-Bradley environments.Modbus TCP – vendor-neutral, ideal for SCADA, gateways and simple integration.🔧 Mounting and dimensions35 mm DIN rail, dimensions 106 × 43 × 61 mm. Snap on without tools, attach I/O modules to the right.🏷️ Manufacturer and reliabilitySolidot (Nanjing Solidot Electronic Technology) specialises in decentralised I/O and fieldbus technology. The XB6S series is designed for continuous industrial use in Europe, CE-marked and RoHS-compliant.
- Available
- Delivery Time : 3 bis 5 Tage
Variants from €101.12 *
Available, delivery time: 3 bis 5 Tage
Preis exkl. MwSt., zzgl. Versandkosten
New
Odot bus coupler for remote I/O, up to 32 I/O modules
From
€85.17 *
Do you want to run the I/O modules of the Odot C series not right next to the PLC, but distributed at the machine or in a sub-distribution? Then put a bus coupler in front of them. It connects up to 32 C-series modules via the fieldbus of your controller, whether your PLC comes from Siemens, Beckhoff, Kinco, Odot or another manufacturer. You just choose the coupler with the matching fieldbus.
🏭 Typical applications
Distributed I/O at the machine: sensors and actuators are wired on site, only one network or bus cable runs to the PLC.
Expanding existing plants: if a Siemens or Beckhoff controller is short of channels, you add them via PROFINET, EtherCAT or PROFIBUS without replacing the PLC.
Together with the Odot C4374: the C4374 is a master for Modbus TCP, Modbus RTU, EtherCAT and CANopen. The matching couplers are CN-8031, CN-8011, CN-8033 and CN-8021. This lets you build additional I/O stations controlled by the PLC.
Building automation and control systems: with BACnet/IP or Modbus TCP the modules deliver their data directly to BMS or SCADA systems.
🌐 Available fieldbuses
Modbus RTU (CN-8011) · PROFIBUS DP (CN-8012) · CANopen (CN-8021) · DeviceNet (CN-8022) · Modbus TCP (CN-8031) · PROFINET with MRP (CN-8032) · PROFINET without MRP (CN-8032-L) · EtherCAT (CN-8033) · EtherNet/IP (CN-8034) · POWERLINK (CN-8035) · BACnet/IP (CN-8038). The Ethernet versions have 2 RJ45 ports (10/100 Mbit/s) for daisy-chaining in line topology.
💡 Device description files: the matching GSD, GSDML, EDS or XDD files for integration into your PLC software are in the Downloads tab of each coupler. You configure the I/O modules with the free Odot software IO-Config.
🔧 Technical data (all couplers)
Expansion: up to 32 I/O modules of the Odot C series per coupler
Supply: system and field supply 24 V DC, galvanically isolated, with reverse polarity protection; field current max. 8 A
Environment: operation −35 °C to +70 °C for horizontal, −35 °C to +60 °C for vertical mounting; storage −40 °C to +85 °C; protection class IP20
Mounting: 35 mm DIN rail, push-in terminals, dimensions 51.5 × 115 × 75 mm (W × H × D), 130 g
⚠️ Don't forget the end module: every station needs an end module CT-5801 at its end. It is not included with the bus coupler, please order it as well.
🏷️ Manufacturer
Odot Automation (Sichuan Odot Automation System Co., Ltd.) specialises in IEC 61131-3 controllers and distributed I/O systems. The bus couplers are part of the C-series system and work with all digital, analog, temperature and special modules of the series.
- Min. 1 Variant available.
- Delivery Time : 3 bis 5 Tage
- Product Benefits 1: up to 32 I/O modules
- Product Benefits 2: 11 fieldbuses to choose
- Product Benefits 3: Push-in terminals, DIN rail
- Product Benefits 4: −35 °C to +70 °C
Available in 14 days, delivery time 3 bis 5 Tage
Preis exkl. MwSt., zzgl. Versandkosten
Solidot bus coupler Ethernet/IP for XB6 remote I/O with power supply unit and end cap
From
€142.08 *
⚠️ Remaining stock. The XB6 series is being phased out. Its successor is the XB6S coupler kit from the XB6S series. While stock lasts you can still get XB6 — for extending an existing installation that is often exactly what you want, because coupler and modules have to match.
🔌 Bus coupler with power module and end capThe coupler is the head of an XB6 station: it talks to the controller over the fieldbus and supplies the attached I/O modules through the 5 V backplane. Power module and end cap are included. Available for EtherCAT, EtherNet/IP, Modbus TCP, PROFIBUS DP and PROFINET — the modules behind it stay the same in every case.
⚙️ Series characteristics5 V backplane bus, supplied with 18 – 36 V DC through the power module in the coupler kit-10 °C to +60 °C operating, -20 °C to +75 °C storage, 95 % relative humidity without condensation, IP2035 mm DIN rail, pluggable spring-loaded terminals, a green LED next to every channelModule 106 x 73 x 25.7 mm, coupler and power module 106 x 61 x 22.5 mm
Technically XB6 is not a risk: the series has been in the field for years, the modules are mature and the documentation is complete. Manuals, GSDML, ESI and EDS files, EPLAN macros and 2D and 3D models are in the downloads section of this page.
- Available
- Delivery Time : 3 bis 5 Tage
- Product Benefits 1: Remaining stock
- Product Benefits 2: 5 coupler versions
- Product Benefits 3: Power module and cap included
- Product Benefits 4: 5 V backplane bus
- Product Benefits 5: -10 °C to +60 °C
Variants from €112.64 *
Available, delivery time: 3 bis 5 Tage
Preis exkl. MwSt., zzgl. Versandkosten
Solidot Ethercat bus coupler for XB6 remote I/O with power supply unit and end cap
⚠️ Remaining stock. The XB6 series is being phased out. Its successor is the XB6S coupler kit from the XB6S series. While stock lasts you can still get XB6 — for extending an existing installation that is often exactly what you want, because coupler and modules have to match.
🔌 Bus coupler with power module and end capThe coupler is the head of an XB6 station: it talks to the controller over the fieldbus and supplies the attached I/O modules through the 5 V backplane. Power module and end cap are included. Available for EtherCAT, EtherNet/IP, Modbus TCP, PROFIBUS DP and PROFINET — the modules behind it stay the same in every case.
⚙️ Series characteristics5 V backplane bus, supplied with 18 – 36 V DC through the power module in the coupler kit-10 °C to +60 °C operating, -20 °C to +75 °C storage, 95 % relative humidity without condensation, IP2035 mm DIN rail, pluggable spring-loaded terminals, a green LED next to every channelModule 106 x 73 x 25.7 mm, coupler and power module 106 x 61 x 22.5 mm
Technically XB6 is not a risk: the series has been in the field for years, the modules are mature and the documentation is complete. Manuals, GSDML, ESI and EDS files, EPLAN macros and 2D and 3D models are in the downloads section of this page.
- Available
- Delivery Time : 3 bis 5 Tage
- Product Benefits 1: Remaining stock
- Product Benefits 2: 5 coupler versions
- Product Benefits 3: Power module and cap included
- Product Benefits 4: 5 V backplane bus
- Product Benefits 5: -10 °C to +60 °C
Solidot bus coupler Profibus DP slave for XB6 remote I/O with power supply unit and end cover
From
€158.72 *
🔌 PROFIBUS DP bus coupler with power module and end capThe coupler is the head of an XB6 station: it talks PROFIBUS DP to the controller and supplies the attached I/O modules through the 5 V backplane. Power module and end cap are included. For installations staying on PROFIBUS this is our remote I/O answer — we do not stock the newer XB6S series with PROFIBUS.
⚙️ Series characteristics5 V backplane bus, supplied with 18 – 36 V DC through the power module in the coupler kit-10 °C to +60 °C operating, -20 °C to +75 °C storage, 95 % relative humidity without condensation, IP2035 mm DIN rail, pluggable spring-loaded terminals, a green LED next to every channelModule 106 x 73 x 25.7 mm, coupler and power module 106 x 61 x 22.5 mm
Technically XB6 is not a risk: the series has been in the field for years, the modules are mature and the documentation is complete. Manuals, GSDML, ESI and EDS files, EPLAN macros and 2D and 3D models are in the downloads section of this page.
- Available
- Delivery Time : 3 bis 5 Tage
- Product Benefits 1: PROFIBUS DP
- Product Benefits 2: Power module and cap included
- Product Benefits 3: 5 V backplane bus
- Product Benefits 4: -10 °C to +60 °C
- Product Benefits 5: DIN rail, spring terminals
Variants from €112.64 *
Available, delivery time: 3 bis 5 Tage
Preis exkl. MwSt., zzgl. Versandkosten