🏭 Variable Frequency Drive with IP66 Protection for Harsh Environments Anyone looking for a VFD that works in dusty, wet or water-spray environments – in agriculture, food processing, outdoor installations or demanding industrial settings – will find the M-Driver M980 a robust and cost-effective solution. The M980 brings IP66 protection directly to the drive housing: no additional enclosure required, mount directly at the machine. 🏭 Typical Applications Pumps and fans in wet or outdoor areas: Irrigation systems, wastewater pumps, cold-room ventilation – IP66 protection allows direct installation without a separate enclosure. The built-in PID controller handles constant-pressure regulation on its own. Food and agricultural environments: Conveyor drives in food processing, stable ventilation, silo conveying – wherever washdown water and dust are part of daily life and conventional IP20 drives only survive inside a cabinet. Construction sites and mobile equipment: Mixers, concrete conveyor systems or portable pump units that are occasionally exposed to water spray and have no fixed control cabinet location. Simple retrofit projects: Replace direct-on-line starters, reduce energy consumption, limit inrush current – without a complex terminal layout. The 8-segment multi-speed function works with just 2 digital inputs. 🖥️ Key Technical Data Control mode: Open-loop vector control (SVC) and V/F curve (linear, square, multi-point). Sufficient for most pump, fan and basic conveyor applications. Output frequency: 0 – 500 Hz, carrier frequency 0.5 – 16 kHz (automatically adjusted by load) Overload capability (G-type): 150% rated current for 60 s, 180% for 3 s Starting torque (SVC): 150% at 0.5 Hz – for hard-to-start loads Supply voltage: Single-phase 200–240 V AC or three-phase 380–480 V AC (±10%, 50/60 Hz) depending on variant Power range: 0.75 kW to 15 kW (three-phase) or 0.75 kW to 4 kW (single-phase) 🔌 I/O and Connections Digital inputs: 2 × (DI3, DI4), opto-isolated, bipolar (active-high or active-low selectable) – configurable as run/stop, direction, fault reset, multi-speed, preset frequencies and more Analog input: 1 × AI1 – selectable 0–10 V / 4–20 mA / 0–20 mA, with adjustable gain and offset Relay outputs: 2 × relay (T1, T2) – T1 and T2 each one normally open contact; T2 additionally with normally closed contact; 250 V AC / 3 A, 30 V DC / 1 A Analog output: 1 × AO1 – selectable 0–10 V / 4–20 mA / 0–20 mA; configurable for output frequency, current, voltage, power or Modbus control Auxiliary supply: 10 V and 24 V output terminals for external wiring (e.g. potentiometer 1–5 kΩ) 🌐 Communication and Built-in Functions Modbus RTU via RS-485 (terminals S+/S-): Full remote control and parameter access via Modbus. Address 1–249 freely configurable, baud rate 9,600 – 115,200 bps, multiple data formats (8-N-1, 8-E-1, 8-O-1, 8-N-2). Built-in PID controller: Direct connection of a pressure sensor (0–10 V, 4–20 mA or variants) to AI1. Setpoint via keypad, potentiometer or Modbus. Sleep/wake function, anti-freeze operation and water shortage detection included. 8-segment multi-speed with internal PLC sequencing (timing, individual acceleration/deceleration per segment configurable). Further features: Speed-tracking restart, S-curve ramp, skip frequency (resonance protection), DC braking, over-voltage/over-current stall prevention. ⚠️ Important Limitations – Please Check Before Purchasing Only 2 digital inputs (DI3 and DI4): Applications with a complex terminal concept – safety relay chains, multiple external speed-step switches, enable signals from a safety PLC – quickly reach the limits of what is possible. Where start/stop, setpoint and control commands can be handled entirely via Modbus RTU (RS-485), many applications can get by without additional DI terminals – which significantly reduces this limitation. However, anyone who needs hardware DI signals from sensors or safety relays and requires more than 2 will need a different drive. Digital inputs NPN only (sinking) – no PNP: Control inputs DI3 and DI4 are implemented as NPN inputs only (active-low, sinking). In Europe, most PLC output cards use PNP outputs (sourcing, 24 V switched to GND). Direct wiring from a PNP PLC to the M980 DI terminals is therefore not possible – an interposing relay, opto-isolator interface or a NPN-compatible PLC output is required. When using full Modbus RTU control, this issue does not apply. No brake chopper, no braking resistor connection: The M980 has neither a built-in brake chopper nor terminals for connecting an external braking resistor. With high-inertia loads (e.g. centrifuges, large-diameter fans, conveyors with frequent braking cycles), regenerative energy cannot be actively dissipated – the drive protects itself by tripping on overvoltage. Anyone requiring short deceleration times or dynamic braking must use a drive with an integrated brake chopper. Thermal derating above 40 °C: Rated output current applies up to 40 °C ambient. Above this, it decreases by 1.5% per degree; maximum permissible is 50 °C. For permanently higher temperatures, select the next higher power rating or provide active cooling. Altitude derating above 1,000 m: At high altitudes, cooling efficiency decreases due to thinner air. Derating: 1% per 100 m above 1,000 m; maximum operating altitude is 4,000 m. IP66 – but not for direct sunlight or corrosive atmospheres: Despite its IP66 rating, the manufacturer specifies installation away from direct sunlight, corrosive or flammable gases, oil mist and salt. For aggressive outdoor air (marine environments, chlorine-containing atmospheres), additional protective measures must be considered. No built-in EMC filter: spstiger exclusively stocks the variant without an integrated line filter. For operation on sensitive networks or in CE-compliant installations, an external EMC filter must be included in the design. 🏷️ Manufacturer and Reliability M-Driver is a brand specializing in robust variable frequency drives with a focus on high-protection variants for demanding operating conditions. The M980 is CE-certified and meets the EMC requirements for industrial use in Europe. spstiger distributes and supports the M980 for the German and European market – please contact us with any commissioning or parametrization questions. 🔧 Mounting and Scope of Delivery Mounting: Screw fixing, vertical, on mounting plate or wall (no DIN rail clip). Minimum clearances: sides ≥ 10 mm, top and bottom ≥ 200 mm (for 0.75–22 kW). Mount multiple drives side by side rather than stacked – heat dissipates upward, stacking causes thermal interference. Scope of delivery: M980 frequency inverter. The separately available copy keypad (item no. md.copykeypad) enables convenient parameter backup and transfer between drives.