APC Power Supply User Manual

Make contact closure connections (NO 

or NC) at the user connection plate to 

monitor dry contacts. You can make 

eight connections—four contact inputs 

and four output relays.

The figure at the right shows the location 

of the user connection plate on the roof 

of the PDU enclosure. 

You can make connections from inside 

the enclosure, or you can remove the 

user connection plate and make your 

connections.

Remove the plate using a Phillips or 

standard screw driver to loosen the two 

captive screws. Use the knockout in the 

plate to route cables to and from the user 

connections on the plate. If you remove 

the plate, make sure that you do not 

disturb the existing connections. 

Nominal switching capacity: 

1A at 30VDC

Maximum switching power: 

30W

Maximum switching voltage: 

60VDC

Maximum switching current: 

2ADC

Maximum carrying current: 

2ADC

Surge ratings:

2kV per Bellcore TA-NWT-001089
1.5kV per FCC part 68

1

2

3

4

AT

S E

N

AT

S 0

AT

S

 1

AT

S 2

EPO 

Contact

–     +

EPO 24V

AC/DC

Contact Inputs

Contact Outputs

USER INTERFACE

© 2001 APC 

MADE IN USA