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9 pin D-SUB female connector layout
9 pin D-SUB female connector
at the UPS
MGE Pulsar EL 7 UPS Systems communication port pinout

DB-9 Pinouts

Pin
Number		 Pin
Name		 Description
n/a Shield Frame/case ground.
1 Frame Ground Frame/case ground.
3 Remote Shutdown If a positive signal level (+5V to +12V DC) is applied for at least 1 seconds, while the UPS is operating on battery, shuts the UPS off after 120 seconds.
4 Normally Closed On-Battery Contact A normally closed contact that opens (releases from Common) after the UPS switches to battery power.
5 Signal Ground (Common) The signal ground for all signal pins.
7 Normally Open Low-Battery-Alarm Contact A normally open contact that closes (pulls to Common) during a Low Battery Alarm.
9 Normally Open On-Battery Contact A normally open contact that closes (pulls to Common) after the UPS switches to battery power.

Contacts consist of open collector circuits capable of switching up to +30 VDC, 6 mA resistive load.

Note: for additional information how to connect this UPS to the computer, please look APCUPSD Voltage Signalling Simple-Custom Cable for MGE Pulsar EL 7.

 

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