Caterpillar Electronic Locomotive Control System II Caterpillar

11. Electrical Interface Guide

Usage:

The purpose of this section is to describe in detail the function of each harness connection to the Main Electronic Control Box. Since these functions these functions are fully defined by the active software, this section is only relevant when the resident software is active. Customized functions defined by customized optional software are beyond the scope of this manual.

Connector J1 Wire Number 1. Gen-Load:

This input accepts a control-level voltage referenced to connector J1 wire number 15. A de-energized input inhibits loading of the generator. This input should be energized anytime generator load is desired and should be de-energized at all other times.

Connector J1 Wire Number 2. Wheel-Slip:

This input accepts a control level voltage referenced to connector J1 wire number 15. A de-energized input causes gradual reduction of load on the generator. An energized input causes gradual increase of load on the generator up to the appropriate power for the selected notch. If GEN-LOAD is de-energized this input has no effect. This input is intended to be connected to the output of a wheel slip sensing system in such a way as to cause power to be decreased when the wheels are slipping and then reapply the power when the slip condition clears. The rates of power ramp-down and power ramp-up are controlled by two potentiometers located under plugs P3 and P2 on the personality module of the control box (See Photo) If wheel-slip function is not being used, it must be energized to allow generator loading.

Connector J2 Wire Number 9. Lamp Relay:

This output should be connected to a CAT P/N xyxxxx 12VDC relay. The contacts of this relay can be used to control a cab warning light to indicate malfunction of the control system. This output will not drive a standard locomotive relay. The relay will be energized under the following conditions:

1. For 10 seconds following application of power to the control module. This is intended as a lamp test.

2. On shutdown of the engine if any control system problems have been diagnosed.

3. While the engine is running if any major control problems are diagnosed. Use of this output is optional.

Connector J1 Wire Number 4. Exciter Sink:

This input should be connected, through FLYBACK any desired interlocks, to the positive terminal of the power supply to be used to drive the generator exciter field for load control.

Connector J1 Wire Number 5. Exciter Sink:

Connections to this terminal should be determined by referring to the schematic in Appendix A.

Connector J1 Wire Number 6. Exciter Source:

Connections to this terminal should be determined by referring to the schematic in Appendix A.

Connector J1 Wire Number 7. Exciter Source:

This input should be connected to the FLYBACK negative terminal of the power supply to be used to drive the generator exciter field.

Connector J1 Wire Number 8. +V Batt (Pwr Sup):

This input provides the master power to the Electronic Control Module and should be connected to the positive terminal of the power supply to be used to supply the control module.

Connector J1 Wire Number 9. -V Batt (Pwr Sup):

This input provides the master power to the Electronic Control Module and should be connected to the negative terminal of the power supply to be used to supply the control module.

Connector J1 Wire Number 10. Current Sense:

This input accepts a 0-50 VDC input, referenced to connector J1 wire 9, proportional to generator current. This input is necessary if KWMODE or CURRENT LIMIT options have been selected. If not, this should be connected to the same location as connector J1 wire 9.

Connector J1 Wire Number 11. Voltage Sense:

This input accepts a 0-50 VDC input, referenced to connector J1 wire 9, proportional to the generator voltage. This input is necessary if KWMODE or VOLTAGE LIMIT options have been selected. If not this input should be connected to the same location as connector J1 wire 9.

Connector J1 Wire Number 12. Operator:

This input accepts a control-level input SHUTDOWN referenced to connector J1 wire 15. A de-energized input will cause immediate shutdown of the engine. The engine will be disabled from restart for 10 seconds following:

1. Complete stop of engine

2. Energizing this input

whichever occurs last. It is intended to be used as an energize-to-run shutdown that can be used with either a momentary contact shutdown switch or can be wired into other sensing systems to cause shutdown of the engine. This input MUST be energized for the engine to operate.

Connector J1 Wire Number 13. Fast/Slow:

This input accepts a control-level input referenced to connector J1 wire 15. If the input is de-energized the FAST acceleration rate of the engine speed and power output is selected. If the input is energized the SLOW acceleration of the engine speed and power output is selected. This input is intended to be wired either to an operator controllable switch to select performance or to an automatic system to select performance based on trainline voltages. This input may be changed at any time without adverse effect.

Connector J1 Wire Number 14. +V Batt (Inter):

This input supplies power to the switch input circuits. This input should be connected to the positive terminal of the power supply which is providing power to the switch inputs (i.e., GEN LOAD, WHEEL-SLIP, NOTCHES A-D).

Connector J1 Wire Number 15. -V Batt (Inter):

This input supplies power to the switch input circuits. This input should be connected to the negative terminal of the power supply which is providing power to the switch inputs.