44 1600XPi Series UPS Installation and Operation Manual – 60616-014
18 Communication Interfaces
18.1 Remote Contacts
The remote contacts interface is provided as a set of solid state switching devices. The switches are available through a
DB9 male connector on the rear of the UPS. The following chart shows the pin assignment for each signal.
MAXIMUM CURRENT CARRYING CAPACITY
OF THE SWITCH
DB9 MALE CONNECTOR OUTLINE
(FACING CONNECTOR)
Voltage Current
48 Vdc peak 70 mA peak
30 Vac rms
(42 Vac peak)
50 mA rms
(70 mA peak)
Pin Signal Function Logic In the UPS
1 Fault Signal
Closed when fault detected (See
Section 24.3 for list of applicable
faults)
2 UPS stop common
Backup stop when +3 to +15 V
applied between pins 2 and 3.
1
3 UPS stop signal input
4 Normal input power supply Closed with normal supply power
5 Signal common Common signal return
6 Bypass operation Closed during bypass operation
7 Battery voltage drop
If UPS detects battery voltage
less than Low Battery Threshold
(Parameter 547), UPS will output
logic high to pin
8 UPS operation Closed during inverter operation
9 Power failure signal Closed at power failure
NOTE: Pin switches are shown in their inactive states. For example, if battery voltage is low, pin 7 will be connected to pin 5.
1: When not applying +3 to +15V, the voltage supplied to pins 2 and 3 should be reverse biased (-3 to -15V) to avoid
unintentional closure due to signal noise.
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