Copeland E3 - XR75 CX Case Display; Overview; Application Advisories

©2025 Copeland LP.
026-1803 R13 Supervisor I&O User Guide 9 - 37
9.21 XR75CX Case Display
The XR75CX-Case Display is a microprocessor based
controller, suitable for applications on medium or low
temperature ventilated refrigeration units. The Supervisory
Controller will communicate with the XR75CX Case Display
via MODBUS using the Open MODBUS infrastructure.
How To Add an XR75CX CaseDsp Device on the
Supervisor:
1. From the Home screen, click the Control Inventory icon
(box). Click the drop-down arrow for Add Control in the
appropriate category and select from the list.
2. Select the Control or Application Type - XR75CX
CaseDsp, enter the Quantity, Control Name and Serial
Type. Note that Serial Type information can be enter later.
Click Save to add the application.
3. A Confirmation box will appear saying that the
application is successfully added to the system, click
Close or Edit these controls.
4. The system will display the new application(s) on the Site
Summary screen.
5. Click the XR75CX CaseDsp application panel box to view
the application.
6. The system will display the XR75CX CaseDsp application
parameters.
7. The user can view and configure the properties of the
application by setting the Edit Mode to “ON” on the
screen drop-down arrow on the upper right of the screen.
9.21.1 Overview
The Supervisory Controller will provide an interface to the
XR75CX CD and alarming. The XR75CX CD can be
networked with the Supervisory Controller to share sensor
data with a Standard Circuit application that controls the case
refrigeration, and it has four on-board relays that can be used
as satellite outputs by the other Supervisory Controller
applications.
9.21.2 Application Advisories
The application is facilitate the various alarming and setting of
status information:
Table 9-18 - Application Advisories
Advisory
(Display Name)
Category Description
dA sensor failure Non-Critical
Discharge air
temperature
Pr sensor failure Non-Critical
Product temperature
sensor fails
Co sensor failure Non-Critical
Coil out temperature
sensor fails
dF sensor failure Non-Critical
Defrost temperature
sensor fails
EEPROM failure Non-Critical
an alarm condition exists
in the XR75CX Case
Display application
Wrong device Notice
The device code
contained in the device
ID information is not
correct
Network device
offline
Critical
Network device offline
alarm
NOTE
NOTE: When an XR75CX-CD is associated with a
Standard Circuit application in the Supervisory
Controller, a Case Temp Hi Limit Exceeded or
Case Temp Lo Limit Exceeded alarm that occurs
for the XR75CX-CD’s associated case will cause
the main module and remote display’s Alarm
LED to turn ON, indicating an active alarm. Unlike
XR75CX-CD’s temperature sensor alarms, a “No
Alarm” message is shown on the display if a case
temperature alarm occurs.