Use twisted 0.5 mm² (20 AWG) or larger shielded wire to connect the load sharing lines to the other Load Sharing Modules. Connect the (+) wire from the other Load Sharing Modules to terminal 10. Connect the (–) wire from the other Load Sharing Modules to terminal 11. Connect the shield of the load share wiring to terminal 12. The shield should always be connected only to terminal 12. No other shields should be connected to this terminal. Output to the Caterpillar Digital Electronic Control Use twisted 0.5 mm² (20 AWG) or larger shielded wire to connect the pulse-width modulated output signal from terminals 19(+) and 20(–) to the Caterpillar control. Connect the shield to terminal 21 only. Do not connect the shield at the Caterpillar control end of the wiring.
Synchronization Connections
If an SPM-A synchronizer is used, connect twisted-pair 0.5 mm² (20 AWG) or larger shielded wire from the synchronizer to terminals 24(+) and 25(–). Tie the shield to terminal 21. Do not connect the shield at the synchronizer end of the wiring.
Speed Trim Potentiometer
If a speed-trim potentiometer is used, connect a 10 kΩ 10-turn potentiometer to terminals 26 (CW), 27 (wiper), and 28 (CCW). Use 0.5 mm² (20 AWG) or larger shielded wire, and connect the shield to terminal 21. Do not connect the potentiometer end of the shield. The potentiometer is used to move the speed setting when manually synchronizing the generator or to change load demand in droop mode. If no potentiometer is used, add a 10 k resistor between terminals 26 and 28. Shielded output lines should be limited to 30 m (98 ft) maximum length.
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