
28
G2020 Series UPS Installation and Operation Manual
– 94861-004
4.4.1
Aux Contacts
– Input
The Input terminal provides four (IN1 thru IN4) programmable contacts that can be set to any of the functions in
Table 4
–1.
Do not apply voltages to remote access input terminals.
Damage to UPS may result.
Inputs require a dry NO (Normally Open) contact to be wired on the corresponding terminals on TN1 of IOAU-09.
Closing this contact activates the selected functionality set for that input. The Inputs provide a signal or "wetting"
voltage of 24VDC / 8.3 mA. See Figure 4-19. The function takes effect immediately upon contact closure, and
is removed immediately upon opening.
Figure 4-19 Control Wiring for Aux Input Contacts
PROHIBIT
Switch
Signal
Wire Size: #14AWG
(2 mm
2
) or less
External block IOAU-09
Relay
Coil
UPS Cabinet
External to
UPS Cabinet
Use Momentary
Switches only
Relay Coil current: 8.3mA
24VDC
Common
User supplied
ON
OFF
0.5s
– 4s
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