Transfer Switch Connection - Kohler 26RCA Installation Manual

3.3.2

Transfer Switch Connection

Connect the ATS or remote start/stop switch. Connect the load leads from the generator set to the Emergency source lugs on
the ATS. Route low-voltage communication leads through separate conduit from the AC power and load leads. All connections
must comply with applicable state and local codes.
Communication connections for a Model RXT transfer switch
One Model RXT transfer switch can be connected to the generator set. See Figure 28. Use shielded, twisted-pair communication
cable to connect P10-1 through P10-4 on the transfer switch interface module to the generator set terminal block connections
A, B, PWR, and COM. See the Communication Cable Specifications section for the communication cable recommendations
and maximum cable length.
Note:
Connections 3 and 4 on the generator set are not used with the Model RXT transfer switch.
Engine start connection for other transfer switches or a remote start/stop switch
Connect the engine start leads from the transfer switch or remote start switch to terminals 3 and 4 on the terminal block.
See Figure 29. Route the engine start leads through separate conduit from the AC power and load leads.
Generator Set
Note:
Generator set terminal block connections 3 and 4 are NOT USED with the Model RXT ATS.
 RXT transfer switch with standard or combined interface/ load management board.
1. Generator set terminal block. Check the decal on the generator set for terminal block connections.
2. Connect one end of each cable shield to GROUND at the generator set.
3. Communication cable Belden #9402 or equivalent 20 AWG shielded, twisted-pair cable. See the Communication Cable
Specifications section.
4. Leave one end of each cable shield disconnected. If accessory modules (PIM or load shed kit) are connected, see the System
Connections with Accessory Modules section.
Figure 28 Model RXT Transfer Switch Communication Connection to Generator Set Terminal Block
40
1
GND
3
4
COM
COM
PWR
PWR
RBUS B B
A
A
12 VDC
4
2
A
B
PWR
COM
4
3
RXT*
TP-7091 4/23