Danfoss 080G5400 EKE 1C Superheat Controller

Product Overview

The 080G5400 (080G5400) is a high-performance Danfoss EKE 1C Superheat Controller engineered to optimize the efficiency of evaporators in precision cooling and HVAC systems. Designed for demanding industrial environments such as cold storage, food processing, and data center thermal management, this module ensures accurate refrigerant flow control by regulating electronic expansion valves (EEVs). By maintaining minimal stable superheat, the 080G5400 significantly reduces compressor energy consumption and prevents liquid slugging, effectively minimizing unscheduled downtime in critical infrastructure. Its robust hardware architecture supports complex ratiometric pressure sensing and multi-protocol communication, making it a cornerstone for automated refrigeration logic.

Technical Configuration

The EKE 1C platform is built on a versatile hardware framework designed for DIN rail mounting within control cabinets. It features a sophisticated analog input array supporting up to three pressure sensors with ratiometric 0.5 - 4 VDC feedback, ensuring high-resolution data acquisition for PID control loops. For system reliability, the controller integrates a dedicated battery back-up input (18 - 24 VDC), allowing the EEV to close safely during a total power failure. Communication is a core strength; the unit supports native Modbus RS485 RTU for integration into building management systems (BMS) and CANBUS for internal controller networking. The "Signal Share" capability via hardwiring allows multiple controllers to synchronize data, reducing the need for redundant sensors across the refrigeration circuit.

Technical Specifications

Technical FAQs

How does the EKE 1C handle power loss to the expansion valve?

The controller includes dedicated terminals for a 18 - 24 VDC battery back-up. In the event of a primary 24 V power failure, the controller utilizes the stored energy to drive the electronic expansion valve to a fully closed position, protecting the compressor from liquid return.

Can the 080G5400 operate without a local display?

Yes. While the unit does not feature a front-facing display, it is fully compatible with the MMIGRS2 external display option. Configuration can also be performed via the Modbus RS485 interface using a PC-based service tool.

What type of pressure sensors are compatible with this unit?

The unit is optimized for ratiometric pressure transmitters that provide a 0.5 - 4 VDC output signal. It can support up to three sensors to monitor suction and discharge pressures across complex evaporation circuits.

Engineering & Installation Guide

• Power Supply Integrity: When utilizing the "Shared Power Supply" feature, ensure the transformer is adequately sized to handle the peak inrush current of the electronic expansion valves. Use twisted-pair cabling for the 24 VDC supply to minimize electromagnetic interference (EMI) in high-frequency environments.

• Communication Shielding: For Modbus RS485 and CANBUS runs exceeding 10 meters, use shielded twisted-pair (STP) cable. The shield must be grounded at a single point only—typically at the Master controller or Gateway—to prevent ground loops that can corrupt sensor data.

• Thermal Management: Although the unit is rated for up to 55 deg C, maintain a minimum 10 mm clearance between the EKE 1C and adjacent high-heat components (such as contactors or power supplies) on the DIN rail to ensure long-term stability of the internal processor.