12
Table 5 — Compressor Protection Module Inputs and Outputs*
*“X” denotes the circuit, A or B.
†See Appendix D for MTA settings.
DESCRIPTION
INPUT/OUTPUT
I/O TYPE
DISPLAY MODULE POINT NAME
CONNECTION POINT
Pin
Notation
Power (24 vac supply)
—
—
—
CPM-X-J1
11
24 vac
12
Ground
Local Equipment Network
—
—
—
CPM-X-JP12
1
RS485 Port (D+)
2
RS485 Port (Gnd)
3
RS485 Port (D-)
CPM-X-J12
1
RS485 Port (D+)
2
RS485 Port (Gnd)
3
RS485 Port (D-)
Circuit X High Pressure Switch
HPS-X
Switch
Not available
CPM-X-J7-CH05
1
2
Oil Level Switch
Oil LS X
Switch
Circuit X Oil Solenoid,
OLS.X
CPM-X-J6-CH06
1
2
Must Trip Amps†
MTA (S2)
8-Pin DIP Switch
Must Trip Amps,
MTA.X
Configuration Switch†
S1
8-Pin DIP Switch
S1 Config Switch,
C.SW.X
Compressor X Motor Temperature
MTR-X
NTC Thermistor
Motor Temperature,
CTP.X
CPM-X-J9-CH01
1
2
Compressor X Discharge Gas Temperature
DGT X
NTC Thermistor
Discharge Gas Temp,
DGT.X
CPM-X-J9-CH02
1
2
Oil Pressure Transducer
OPT X
Pressure Transducer
Oil Pressure,
OP.X
CPM-X-J10B-CH04
5V
+ 5 vdc ref
S
Signal
R
Return
Economizer Pressure Transducer
(sizes 175,200,350,400 only)
EPT X
Pressure Transducer
Economizer Pressure,
ECP.X
CPM-X-J10A
5V
+ 5 vdc ref
S
Signal
R
Return
Compressor Current X Phase A
Current Sensor
CUR.A
CPM-X-J8-CH01
1
2
Compressor Current X Phase B
Current Sensor
CUR.B
CPM-X-J8-CH02
1
2
Compressor Current X Phase C
Current Sensor
CUR.C
CPM-X-J8-CH3
1
2
Compressor X 1M Contactor
C X 1M
Contactor
Compressor Output,
CP.X
CPM-X-J1-CH07
1
2
Compressor X 2M Contactor
C X 2M
Contactor
Not available
CPM-X-J2-CH8
1
2
Compressor X S Contactor
C X S
Contactor
Not available
CPM-X-J2-CH9
1
2
Oil Solenoid X
Oil solenoid-X
Solenoid
Oil Solenoid Output,
OLS.X
CPM-X-J2-CH12
1
2
Load Solenoid X
Loading Solenoid-X
Solenoid
Slide Valve 1 Output,
SL1.X
CPM-X-J2-CH13
1
Unload Solenoid X
Unloading Solenoid-X
Solenoid
Slide Valve 2 Output,
SL2.X
CPM-X-J2-CH14
1
2