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Product Specifications
Operating Temp: -40° to 150°F (-40° to 65°C)
Storage Temp: -40° to 175°F (-40° to 80°C)
Power Supply Range: 85-265VAC, 50-60 Hz
Working amperage for CT module: 3-200A
NOTE: The CoreSense module is not accurate below
3 Amps. If the current drawn by the compressor during
operation falls below 3 Amps, the module may indicate
a nuisance fault condition and alarm.
The CoreSense module connections are standard male
electrical flag terminals.
Maximum continuous contactor coil current is 2A with
a max inrush current of 20A.
Compressor Lead Wiring
The compressor leads must be routed through the holes
in the CT module marked T1, T2, and T3. Only the
compressor lead wires should be placed through
the CT module.
CoreSense Module Mounting
The CoreSense module will come pre-mounted inside
the compressor terminal box. The module is mounted
so all LEDs are in front of the light pipes in the terminal
covers so codes are visible when the terminal box cover
is installed on the terminal box.
110-220VAC CoreSense Module Power Wiring
The CoreSense module requires 115-230VAC power
between to the L1 and L2 terminals. The module should
remain powered through all states of compressor on/off
operation. Refer to wiring schematic examples.
Demand Wiring
The CoreSense module requires a demand signal to
operate properly. The demand signal input, labeled
D on the module, should always be connected to the
compressor demand so that the demand signal input
is 110 or 220VAC with respect to L2. See Figure 8
for proper wiring diagrams. Choose the appropriate
diagram depending on how the demand signal will be
fed to the module.
For K5 refrigeration scrolls with CoreSense diagnostics,
a relay (indicated by K1 in Figure 8) needs to be installed
in series with the "Demand" circuit. The normally open
relay should close when demand is present. When the
coil is not energized, the demand signal input should
be less than 0.5VAC. This is to avoid a "Demand, No
Current" alert (steady yellow LED) when the compressor
© 2012 Emerson Climate Technologies, Inc.
Printed in the U.S.A.
Application Engineering
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cycles off or goes into a scheduled pump down. Refer to
the wiring diagram in Figure 8 for more detail. Emerson
recommends a general purpose / industrial relay with
mounting socket. The relay contacts should be rated for
5A at 250VAC and the coil needs to match the system's
control voltage (typically 220/240 or 110/120 VAC).
For demand wiring kit see Table 9. For an example of
wiring the relay see Figure 14.
Protection/Contactor Control Wiring
The M1-M2 relay on the CoreSense module is a normally
open relay. When the module is powered and there are
no protective faults, the relay is energized and does not
cycle on/off. On a detected protection condition, the
CoreSense module will de-energize the relay to stop the
motor from running. The relay is not used as a cycling
device for normal compressor operation. The cycling
device must be supplied externally from the module.
Discharge Temperature Protection with CoreSense
Diagnostics for K5 Compressors
Copeland Scroll K5 compressors for refrigeration with
CoreSense diagnostics come standard with discharge
temperature protection. Depending on the application
and refrigerant a certain mode of protection will be
used whether it is a top cap thermistor or DTC valve
with discharge line thermistor. The CoreSense module
identifies the protection device based on the pin
locations in the connector (see Figure 9). Figures 10
and 11 depict the installation of the top cap thermistor
and discharge line thermistor, respectively.
Table 1 at the end of this bulletin identifies the discharge
temperature protection device by application and
refrigerant. Table 4 identifies the service part numbers
for those devices.
Communication DIP Switch Configuration
The communication module on the CoreSense
Diagnostics module is equipped with a 10 switch DIP
switch used for selection of the MODBUS address, baud
rate, parity, and other operating conditions to simplify
service and start-up procedures. See Figure 13. For
more information on DIP switch settings, Table 10 lists
the purpose for each switch.
Note! Cycle power after changing any of the DIP settings
for changes to take effect.
The following steps cover the DIP switch settings
throughout the commissioning process for a multiple
compressor system with communications to the E2:
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Troubleshooting
