Kohler — Interface Module Connection
Installation · Controller interface board
From a Kohler service manual covering: RXT-JFNC-0100A, RXT-JFNC-0200A, RXT-JFNC-0400. Check it applies to your exact model before use.
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Procedure
- Connect the interface module to a Kohler generator set equipped with the RDC2 or DC2 controller via the field-connection terminal block
- Use 20 AWG Belden #9402, 8723, or equivalent shielded twisted-pair cable to connect P10-1 through P10-4 to generator set terminal block connections A, B, PWR, and COM
- Maximum cable length is 61 meters (200 ft.); alternatively use 12-14 AWG wire for PWR and COM only, up to 152 m (500 ft.) with one RXT switch and no accessory modules
- Leave one end of each cable shield disconnected; if accessory modules are connected in series, connect the cable shields as shown and refer to the generator set installation manual
- Connections 3 and 4 on the generator set terminal block are NOT USED with the Model RXT ATS
Tools required
- Belden #9402 or 8723 cable Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Max cable length 61 m (200 ft.) shielded twisted-pair; 152 m (500 ft.) for PWR/COM 12-14 Amazon eBay FridayParts $33.00 AWG
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.