Auxiliary Contacts - Generac Power Systems Nexus Smart Switch Technical Manual

It will be necessary to determine the order of "shedding" the
connected loads and connect the loads to the LSM in that order.
One is the highest priority and four is the lowest priority.
2.6

AUXILIARY CONTACTS

If desired, there are Auxiliary Contacts on the transfer switch to
operate customer accessories, remote advisory lights, or remote
annunciator devices. A suitable power source must be connected
to the COMMON (C) terminal. See Figure 2.3.
Contact operation is shown in the following chart:
Common to Normally Open
Common to Normally Closed
Auxiliary Contacts are rated 10 amps at 125 or 250 volts AC.
DO NOT EXCEED THE RATED VOLTAGE AND CURRENT OF THE
CONTACTS.
Figure 2.2 — Load Shed Module Connections
194 +12V 194 +12V
23 Transfer 23 Transfer
Y wire
Priority 1 Priority 1
Priority 2 Priority 2
Priority 3 Priority 3
Priority 4 Priority 4
NOTE:
Switch Position
Utility Standby
Open Closed
Closed Open
NOTE:
0 Ground 0 Ground
T1 T1
NEUTRAL NEUTRAL
AIR 1 AIR 1
CONTACTOR CONTACTOR
1 1
AIR 2 AIR 2
CONTACTOR CONTACTOR
2 2
CONTACTOR CONTACTOR
3 3
CONTACTOR CONTACTOR
4 4
Figure 2.3 – 400A Switch Auxiliary Contacts
Supply
Contactor #1
Supply
Contactor #2
Coil wires
Supply
Contactor #3
Supply
Contactor #4
Side views shown in Utility position
Installation
Load #1
Load #2
Load #3
Load #4
5