Power Supply Modules
(Cat. No. 1771P4R and P6R)
Installation Data
6
The terminal block has three lines (figure 4):
NC (Normally Closed)
COM (Common)
NO (Normally Open)
Using the normally closed side of the block will keep the relay contacts
open until unit failure (when it will close). Using the normally open side of
the relay will keep the relay contacts closed until unit failure (when it will
open).
To wire the relay, place the incoming line in the NC or NO position and out
the COM position to the load. Any spare point on an input module can be
connected and used for signaling by the relay.
Figure 4
Alarm Relay and AC Power Connections