©2025 Copeland LP.
026-1803 R13 Supervisor I&O User Guide 9 - 38
The following is an example of Case Display properties. Properties can be added to the Supervisory Controller.
9.21.3 Inputs
RelayNCommand - The XR75CX CD has four on-board
relays that may be used as satellite outputs by the other
Supervisory Controller applications. “RelayNCommand” can
be connected to the output of the other applications and
control other physical device, such as fan and light. QA can
test the output for the corresponding relay and test the relay
output of IPX and Onboard IO.
Digital InputN - The two points show status for the two digital
inputs of XR75CX CD, they can be used as the
output source for pointers.
RelayNFailSafe - The XR75CX-CD can operate in Normal
mode and Standalone (failsafe) mode. When the case display
is communicating normally with the Supervisory Controller, it
is operating in Normal mode. If the communication between
the case display and the Supervisory Controller is interrupted,
the case display will go into Standalone (failsafe) mode. The
value of Realy1FailSafe could be tested by the value of the
corresponding relay in Standalone mode.
9.22 XR75CX 2.6
Model XR75CX 2.6 (32 mm x 74 mm) is a microprocessor
based controller, suitable for applications on medium or low
temperature ventilated refrigeration units. It has four relay
outputs to control compressor, fan, and defrost, which can be
either electrical or reverse cycle (hot gas) and light
(configurable). It can have a Real Time Clock (RTC) that
allows programming of up to six daily defrost cycles, divided
into holidays and workdays. A “Day and Night” function with
two different setpoints is fitted for energy saving.
It can also have up to four NTC or PT1000 probe inputs; the
first one for temperature control and the second probe is
located on the evaporator to control the defrost termination
temperature and to manage the fan. One of the two digital
inputs can operate as a third temperature probe. The fourth
probe is used to signal the condenser temperature alarm or to
display a temperature value.
The RS485 serial output enables the unit to be connected to
a network line that is MODBUS-RTU compatible, such as the
monitoring units of the XWEB family. The Hot Key receptacle
allows the controller to be programmed by means of the Hot
Key programming keyboard.
The controller is fully configurable through special
parameters that can be easily programmed through the
keyboard.
Table 9-19 - XR75CX Case Display Status Screen Properties
Input Property: Value: Units: Status: Output Property: Value: Units: Status:
COMM STATUS No Port NA
DISPL TEMP NONE DF NA
DISCHARGE AIR NONE DF NA
PRODUCT TEMP NONE DF NA
COIL OUT TEMP NONE DF NA
DEFROST TEMP NONE DF NA
DIGITAL INPUT2 NOTACT DIG NA
RELAY 1 STATE NOTACT DIG NA
RELAY 2 STATE NOTACT DIG NA
CD ALARM OUT NOTACT DIG NA
RELAY 3 STATE NOTACT DIG NA
RELAY 4 STATE NOTACT DIG NA
EEPROM ALARM NOTACT DIG NA
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