To expand the control relay capacity of the controller, use the Relay Expansion Board (REB8). This provides eight additional 2 Amp Form C dry relay outputs, rated for 24VDC. These relays are socketed and removable.
...
Unlike the large heavy-duty door relays used to switch electric lock or strike power at 10 Amp loads, the expansion relays are normally used for signal level switching or pilot duty. Such switches, when closed, provide an input to a low-voltage sensing circuit like the one shown in Figure 5-3:
...
SW1 | OFF | Normal operating position. |
|---|---|---|
ON | Forces all 8 relays OFF so no system function can actuate the controller until the master override is OFF. | |
SW2 | OFF | Normal operating position. |
ON | Forces all 8 relays ON so no system function will actuate the relays until the master override is OFF. |
...
7. If you detached the green connectors from the board in Step 3, push the connector into the appropriate socket until it locks into place, as shown in Figure 5-45. The connector and socket are keyed, so there is only one way to plug it in.
...
Figure 5-45: Connecting the REB8
8. Repeat this procedure for each wire you need to connect.
...