Electronic Modular Control Panel II (EMCP II) for EUI Engines Caterpillar

Illustration 1	g00327305
(1) Relay driver module. (2) Relay board (optional).

Note: Only the latest generator set controls (GSC) have the relay driver module (RDM) capability. Earlier 123-6004133-6350136-3870 EMCP Electronic Controls do not have the RDM capability. On the latest GSC's, setpoint SP11 must be programmed to the value 9. This tells the GSC to provide serial data at the spare output. See Systems Operation, "Spare Input/Output Programming OP6".

The relay driver module (RDM) is an optional module that can be used to expand the number of available outputs on the GSC. The RDM outputs are controlled by the customer communication module (CCM). For use by the customer, the RDM provides nine additional outputs. The RDM outputs are individually controlled by a serial data link from the GSC. These outputs may drive the optional relay board or these outputs can be directly connected to horns, lamps, or other devices. The relay board contains nine relays. Each relay has one set of NO and NC contacts for use by the customer. These relays are distinct from the seven relays contained within the relay module on the rear of the GSC. These relays are in addition to the seven relays contained within the relay module on the rear of the GSC.

Output Test

When an output test signal is received, the RDM activates all outputs for 10 seconds. The operator can deactivate the test signal early. To do an output test, connect terminal 5 of the RDM to terminal 7 of the RDM with a jumper. When the data link malfunctions, R1 output at terminal 2 of the RDM will FLASH at a rate of 0.5 Hz. Relays R2 through R9 will maintain the present state, or the relays will default to OFF. This is controlled by a jumper between terminals 6 and 7 of the RDM. The relay outputs will maintain the present state if a jumper is NOT present. If the jumper is present, R2 through R9 will default to OFF.

Specifications:

• The maximum distance between the RDM and the GSC is 305 m (1000 ft).

• The operating voltage range is from 15 to 45 DCV.

• The RDM is designed to operate when powered by 24 DCV or 32 DCV battery systems.

• The RDM is capable of operating with an earth ground or without an earth ground.

• The RDM must share a common ground with the GSC and the relay board.

• The terminals on the RDM are 6.4 mm (.25 in.) push on blade type connectors.

• The terminals on the relay board are 6-32 screw terminals.

• The driver outputs of the RDM are intended to drive incandescent lamps or relay loads. The driver outputs sink up to 600mA at 15 to 45 DCV. The driver outputs are protected against short circuits to B±.

• The relay outputs of the relay board are protected by 1 amp fuses. The contacts are flashed silver. The contacts are rated at 1A at 28 DCV. The relay coils draw 20mA at 24 DCV.

Note: The GSC diagnoses a fault in the relay driver module circuit. See Testing and Adjusting, "Diagnostic Fault Codes, CID 334". The CID 334 procedure also contains schematics for relay driver module installation purposes.