XR75CX-Case Display is a microprocessor based controller, suitable for applications on medium or low temperature ventilated refrigeration units. It has up 4 analog inputs: discharge air temperature, product temperature, defrost temperature and coil out temperature, 4 relay outputs, and up to 2 digital inputs.
The Case Display displays these temperatures and values on an LED display. It may be networked with an E2 RX controller (software version 3.02 or higher) to share sensor data with a Standard Circuit application that controls the case refrigeration.
Because the Case Display requires only a single network cable to communicate with an E2, cases equipped with XR75CX-CDs require significantly less wiring and installation labor than traditional installations (which typically require one cable per sensor run to a centrally located group of input boards).
The XR75CX-CD may control 4 external loads directly from its 4 onboard dry-contact relay outputs. The RS-485 serial output enables the unit to be connected to a network line that is MODBUS-RTU compatible.

Two Modes of Operation

The XR75CX-CD can operate in Normal mode and Standalone (failsafe) mode. When the case display is communicating normally with the E2, it is operating in Normal mode. If the communication between the case display and the E2 is interrupted, the case display will go into Standalone (failsafe) mode.