51
11.3 Isolated Relay Contact Card Operation
The Isolated Contacts Interface Card (see Figure D4) is an auxiliary interface card which provides isolated dry
contact signals which indicate:
•
Failure of AC source into the UPS.
•
A low battery-charge state when the UPS is running from battery.
•
UPS is in the BYPASS mode (not on line). There are two modes to select:
•
N/C Contact
- (factory default), JP3 jumpered 1 to 2. See Figure D7.
•
N/O Contact
- JP3 jumpered 2 to 3.
• Summary Alarm. There are two modes to select:
•
N/C Contact
- (factory default), JP1 jumpered 2 to 3. See Figure D6.
•
N/O Contact
- JP3 jumpered 1 to 2.
• A
fi
fth signal will turn off the UPS inverter system. This signal capability is provided for computer-based systems
that can signal when the operating system has been shut down and the UPS battery backup is no longer needed by the
system. This conserves any remaining battery charge for subsequent power failures that may occur before the UPS
battery has been recharged. A one second delay is standard.
See Figure
D8 on page 52 for Isolated Contact Interface Card connector pin numbers and functions.
Figure D4
Figure D5
DB9 Connector
Figure D6
JP1 jumpered 2 to 3
Figure D7
JP3 jumpered 1 to 2
