RXT Transfer Switch Manual

TP-6807 1/1624 Section 2 Installation

7. RBUS connections: Connect the controller

interface connection to A, B, PWR, and COM on

terminal block P10 on the interface/load

management board See Figure 2-16 and

Figure 2-18. The RBUS connections to the

generator set controller are the same for the

standard interface board and the combined board.

See Section 2.6 for interface connection

instructions.

Note: Use separate conduit for the low-voltage

controller communication leads and the load

connection wiring.

Note: Refer to the wiring diagrams in Section 6.

8. Connect the CT leads to connector TB1 on the

interface/load management circuit board. Extend

the leads, if necessary, using customer-supplied

wiring. See Figure 2-18 and/or the wiring diagram

in Section 6 for the connector location.

9. Note the load priorities shown in Figure 2-19.

Priority 1 is considered the most critical and will add

first and shed last. Priority 6 is considered the least

critical and will add last and shed first.

Connect the customer-provided load relays to

terminal block TB2 for Loads A, B, C, and D. See

Figure 2-17 for the connections. See Section 2.7.1

for the recommended relay specifications.

Note: The combination of four load relay outputs

cannot exceed 10 amps total current draw.

10. Connect 120 VAC power to TB2 connections AC1

and N. See Figure 2-17. Connect 120 VAC line

voltage to terminal AC1. Connect the neutral to N.

The power to this circuit must be backed up by the

generator set and not be part of a sheddable circuit.

11. Verify that the jumper is installed across P11--2 and

P11--3 on the combined interface board. See

Figure 2-18.

ADV--8691

1. Combined interface / load management board inside the

enclosure

SIDE VIEW

Figure 2-16 Typical Interface Board Location

GM95547

Figure 2-17 Power Relay Circuit on the Combined

Interface/Load Management Board