PUMP GP-TRANSMISSION 2904792 - Caterpillar

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Programmable Relay Control Module (Front View)
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Programmable Relay Control Module (Rear View)
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Typical installation of the Programmable Relay Control Module, Relay Driver Module and Relay Board (4) ECM (5) CAT data link (6) PRCM (7) Seven relays with outputs (8) Serial data link (9) RDM (10) Nine driver relays (11) Relay board (12) Nine relays with outputs (13) RDM (14) Nine driver relays (15) Relay board (16) Nine relays with outputsRelated Literature
This manual contains safety, installation, operation, and troubleshooting information. Refer to the Service Manual, SENR1003, "EPG Engine Troubleshooting", Service Manual, SENR1008, "Marine Engine Troubleshooting", and Special Instruction, SEHS9951 for additional information. Refer to the wiring schematic for the engine in the Service Manual. Continuing improvement and advancement of product design may cause changes to the Programmable Relay Control Module (PRCM) which are not included in this manual. Consult your Caterpillar dealer for the latest available information. Safety
The safety section in this manual lists basic safety precautions. Read the basic safety precautions before installing the PRCM or operating the PRCM.Description of the PRCM
The Programmable Relay Control Module (PRCM) provides the control of seven relays, six alarms, and two LED displays. In addition, the PRCM can be programmed to control up to two Relay Driver Modules (RDM). Each RDM provides an additional nine relay outputs for a total of twenty-five relays. The PRCM receives information via the CAT data link from the Engine Control Module (ECM). The PRCM utilizes information from eight switched inputs on the PRCM to control the outputs. Control of each relay is programmable through the keypad and displayed on the PRCM.