User's Manual

Connecting a Power Failure Input
3-6 apC/8X Technical Manual
Figure 3.4: Top View of Power Supply Units with Pin Out
Connecting a Power Failure Input
Many uninterruptible and battery backup power supplies provide a relay
output for monitoring the primary AC line. The apS connector P21 MAIN
FAIL provides a normally-closed power failure input.
If you use a apS or battery backup power supply with the apC/8X, connect the
relay common and normally closed outputs of the AC Fault Output to P21.
This input reports all AC faults to the host computer; you do not have to
configure it to do so. To bypass the apS input, place a piece of hookup wire
or a wire jumper across its terminals.
Note: On new modules, the hookup wire may already be in place.
Lien Industries Wall Industries (Sinpro)
Line
Neutral
Ground
Ground
Neutral
Line