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15. Communication Interfaces
15.1 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
Voltage
48 Vdc peak
30 Vac rms
(42 Vac peak)
Pin
Signal Function
1
Fault Signal
2
UPS stop common
UPS stop (LAN Shutdown)
3
signal input
4
Normal input power supply
5
Signal common
6
Bypass operation
7
Low Battery
8
UPS operation
9
Backup signal
NOTE:
Pin switches are shown in their inactive states. For example, if battery voltage is low, pin 7 will be connected to pin 5.
T1000 Series UPS Installation and Operation Manual – 91074-002
Current
70 mA peak
50 mA rms
(70 mA peak)
Logic
NO - Normally Open
NC - Normally Closed
NO - Closed when fault detected
Backup stop when the level
changes from Low (-3 to -15 V) to
High (+3 to +15 V)
NO - Closed with normal Input
Voltage
Common signal return
NO - Closed during bypass
operation
NO - Closed at voltage drop
NO - Closed during inverter
operation
NO - Closed at power failure
FIGURE
15-1:
REMOTE CONTACTS PINOUTS
DB9 MALE CONNECTOR OUTLINE
(FACING CONNECTOR)
In the UPS
DB9
PCB1 CN2
1
15
2
20
3
19
4
18
5
14
6
13
7
17
8
11
9
16
43
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