Programmable Relay Control Module (PRCM) Caterpillar

Display Codes

Usage:

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Table 1
NUMERIC DISPLAY CODE FOR SPECIAL FUNCTION INPUTS
Function Code	Identification	Description
0000	Input Off	Input Always Reads OFF
0001	Input On	Input Always Reads ON
0002	PRCM Diagnostic Code	Input Is Normally OFF. Input Is ON When Any PRCM Diagnostic Code Is Detected. (Refer to Troubleshooting, "Troubleshootng Diagnostic Codes" List.)

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Table 2
NUMERIC DISPLAY CODES AND CONNECTION CHART FOR PRCM DISCRETE INPUTS
Input Code	Identification	40-Pin Connector Contact
1001	PRCM Switch Input 1	38
1002	PRCM Switch Input 2	33
1003	PRCM Switch Input 3	32
1004	PRCM Switch Input 4	40
1005	PRCM Switch Input 5	39
1006	PRCM Switch Input 6	23
1007	PRCM Switch Input 7	24
1008	PRCM Switch Input 8	25

Note: Each switch input must be connected to the ground of the switch input in order to activate. A ground point for the PRCM can be obtained at the negative battery post on the relay module. The relay module is located at the rear of the PRCM. Another ground point location is pin contact 31 of the 40 pin connector on the PRCM.

Note: Open circuit voltage (input inactive) is approximately 10.5 DCV on all of the switched inputs.

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Table 3
DISPLAY CODES FOR INPUTS FROM THE ECM
Input Code	Parameter
2000	ECM Active Diagnostic Present
2001	ECM Active Diagnostic and/or Event Present
2010	ECM Voltage Warning
2011	Engine Oil Pressure Warning
2012	Engine Jacket Water Temperature High Warning
2013	Engine Jacket Water Temperature Low Warning
2014	Overspeed Warning
2015	Air Inlet Restriction Warning
2016	Exhaust Temperature Warning
2017	Oil Filter Differential Pressure Warning
2018	Fuel Filter Differential Pressure Warning
2019	Crankcase Pressure Warning
2020	Aftercooler Temperature Warning
2023	Low Coolant Level Warning
2024	Low Fuel Level Warning
2026	Marine Gear Oil Temperature Warning
2027	Marine Gear Oil Pressure Warning
2040	Injection Disabled
2041	Engine At 100 Percent Load Factor
2042	Engine Speed Above 50 RPM
2043	Overcrank
2044	Start Motor Relay Active
2045	System Not In Auto
2050	Engine Derated
2051	Engine Derated, But Not For Altitude
2070	Engine Monitoring System Shutdown
2071	Engine Oil Pressure Shutdown
2072	Engine Jacket Water Temperature Shutdown
2073	Overspeed Shutdown
2074	Crankcase Pressure Shutdown
2075	Aftercooler Temperature Shutdown

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Table 4
NUMERIC DISPLAY CODES FOR THE PRCM LED DISPLAY
LED CODE	LED IDENTIFICATION
A001	ALARM 1
A002	ALARM 2
A003	ALARM 3
A004	ALARM 4
A005	ALARM 5
A006	ALARM 6

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Table 5
NUMERIC DISPLAY CODES AND CONNECTION CHART FOR THE PRCM
Relay Code	Relay No.	Common	Normally Open Output	Normally Closed Output
P001	K1	RM-13	RM-14	-
P002	K2	RM-34	RM-22	-
P003	K3	RM-30	RM-16	RM-17
P004	K4	RM-33	RM-18	RM-21
P005	K5	RM-35	RM-24	-
P006	K6	RM-32	RM-19	RM-20
P007	K7	RM-31	RM-15	-

Note: Refer to Systems Operation, "Programmable Relay Control Module" for more information on the relay outputs.

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Table 6
NUMERIC DISPLAY CODES AND CONNECTION FOR RDM #1 RELAY OUTPUTS
Output Code	ID ⁽¹⁾	Relay Board Common Output	Relay Board NO Output	Relay Board NC Output	RDM Output Terminal
C101	R1	37	38	39	2A, 2B
C102	R2	34	35	36	3A, 3B
C103	R3	31	32	33	14A, 14B
C104	R4	28	29	30	13A, 13B
C105	R5	25	26	27	12A, 12B
C106	R6	22	23	24	11A, 11B
C107	R7	19	20	21	10A, 10B
C108	R8	16	17	18	9A, 9B
C109	R9	13	14	15	8A, 8B

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IDENTIFICATION

Note: Relay Driver Module (RDM) terminals may be connected in order to sink 600 milliampere loads without the addition of a RDM relay board assembly.

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Table 7
NUMERIC DISPLAY CODES AND CONNECTION FOR RDM #1 RELAY OUTPUTS
Output Code	ID ⁽¹⁾	Relay Board Common Output	Relay Board NO Output	Relay Board NC Output	RDM Output Terminal
C201	R1	37	38	39	2A, 2B
C202	R2	34	35	36	3A, 3B
C203	R3	31	32	33	14A, 14B
C204	R4	28	29	30	13A, 13B
C205	R5	25	26	27	12A, 12B
C206	R6	22	23	24	11A, 11B
C207	R7	19	20	21	10A, 10B
C208	R8	16	17	18	9A, 9B
C209	R9	13	14	15	8A, 8B

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^( 1 )

IDENTIFICATION

Note: Relay Driver Module (RDM) terminals may be connected in order to sink 600 mA loads without the addition of a RDM relay board assembly.

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Table 8
PRCM CONNECTIONS
PRCM J1 Terminals	Identification
19	CAT data link +
20	CAT data link -
35	RDM 1 Serial Data Out
36	RDM 2 Serial Data Out
38	Switch Input 1
33	Switch Input 2
32	Switch Input 3
40	Switch Input 4
39	Switch Input 5
23	Switch Input 6
24	Switch Input 7
25	Switch Input 8
PRCM Relay Module Terminals	Identification
1	+ B
28	- B
2	+ B