080G0321

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The Danfoss 080G0321 is part of the MCX Programmable Controllers series and supports 8 analog inputs, 2 analog outputs, 8 digital inputs, and 8 digital outputs. It features MODBUS communication, operates at 230 V AC with a frequency of 50/60 Hz, and has a power consumption of 20 VA.

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Product Description:

The 080G0321 belongs to the MCX Programmable Controllers series from Danfoss and serves as a field-level logic unit for industrial refrigeration and HVAC machinery. It hosts an embedded microprocessor, onboard memory, and terminal strips so technicians can mount sensors, wire actuators, and implement control sequences without an external PLC. In plant automation it supervises compressor staging, fan cycling, and alarm handling, thereby coordinating mechanical loads with ambient conditions and energy-saving set-points.

This controller provides 8 analog inputs that accept temperature or pressure transmitters, allowing closed-loop regulation alongside 8 digital inputs for status contacts. Output capability is split into relay and triac stages, with 8 digital outputs sharing a cumulative current limit of 32 A across channels 1–8; channels 5 and 6 must see at least 50 mA to guarantee reliable switching. The unit is powered from a single-phase supply of 230 V AC at 50/60 Hz, and it draws only 20 VA, keeping panel heat dissipation low. MODBUS networking allows the supervisory BMS to read registers and write set-points while preserving deterministic response on the local loop.

For command functions the board includes 2 analog outputs that can drive inverter inputs or expansion valves, and it can coordinate up to eight compressors in lead-lag or capacity-control schemes. The enclosure carries an IP20 rating, so it is intended for installation inside a protective cabinet. Environmental hardening supports operation from -20 °C to 60 °C, with functionality maintained at up to 90% relative humidity provided condensation is avoided. These limits enable reliable service in equipment rooms where ambient temperature and moisture fluctuate around the refrigeration plant.

Analog Inputs
8
Analog Outputs
2
Communication
MODBUS
Digital Inputs
8
Digital Outputs
8
Do Sum Current (1–8)
32 A
Do5/do6 Min Load
50 mA
Frequency
50/60 Hz
Ip Rating
IP20
Max Compressors
8
Max Relative Humidity
90% (non-condensing)
Operating Temp Max
60 °C
Operating Temp Min
-20 °C
Power Consumption
20 VA
Supply Voltage
230 V AC
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Internal Product Review

  • ‘‘The 080G0321 from the MCX Programmable Controllers series by Danfoss is a robust control unit featuring 8 analog inputs and 8 digital outputs for flexible integration in automation systems. MODBUS communication and an IP20 rating ensure reliable performance and straightforward connectivity. This controller stands out for its versatile input/output configuration and wide operating temperature range.’’

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