Filter
Top Products
Features
6
Powerware
®
3110 User’s Guide S Rev B www.powerware.com
DB-9 Communication Port
Powerware offers an accessory interface kit that allows you to connect
many types of computer systems to the UPS communication port. For
specific information on Powerware interface kits, call your service
representative.
Contacts consist of open collector circuits capable of switching up to
+30 Vdc, 6 mA resistive load.
Table 1. Communication Port Pin Assignment
Pin Signal Type Function
1 RS-232 Level Shutdown +12 Vdc signal held for 5 seconds on this pin shuts the UPS down
120 seconds later. The UPS restarts after 15 seconds when utility
power returns.
2 Not Used Not Used
3 Normally Open On-Battery Contact A normally open contact that closes 15 seconds (pulls to
Common) after the UPS switches to battery power.
4 Common The signal ground for all signal pins.
5 Normally Open Low-Battery-Alarm Contact A normally open contact that closes (pulls to Common) during a
Low Battery Alarm.
6 Normally Closed Low-Battery-Alarm Contact A normally closed contact that opens (releases from Common)
during a Low Battery Alarm. This tells some shutdown software
when to start a computer shutdown.
7 Not Used Not Used
8 Normally Closed On-Battery Contact A normally closed contact that opens 15 seconds (releases from
Common) after the UPS switches to battery power.
9 Not Used Not Used