Intermatic ug40 modular ユーザーズマニュアル

1. Two Wire Closed Loop: Connect feed wire  to the Common ( C ) terminal and return wire to the Normally Opened 

(N/O) terminal. During normal operation, the contact will be closed between C and N/O.  The contact will open dur
ing an alarm condition. (Refer to Figure 7)

2. Two Wire Opened Loop: Connect the feed wire to the Common ( C ) terminal and return wire to the Normally 

Closed (N/C) terminal. During normal operation, the contact will be opened between C and N/C.  The contact will 
close during an alarm condition. (Refer to Figure 8) 

3. Three Wire Supervised Loop: Connect feed wire  to the Common ( C ) terminal, one return wire to the Normally 

Opened (N/O) terminal and the second return wire to the Normally Closed (N/C)  terminal.  During normal opera-
tion, the contact will be closed between C and N/O and opened between C and N/C. An alarm condition will 
reverse the condition. (Refer to Figure 9) 

4. Consult the instructions for your specific monitoring system for additional information.

Figure 1

Figure 6

Figure 3

Figure 5

Figure 2

Figure 4

Figure 7

Figure 8

Figure 9

2

For convenience sake, these wireing diagrams show installation on the load side of a breaker.  UG40 systems may
be installed without an external breaker.  Refer to installation instruction number 4 on page 1.