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5D. Extended Signal Communication Mode
In this mode, the UPS communication port acts as a source for signals for your computer software
or other external equipment. This mode does not allow for two-way RS232
communication. The functions of pins 1 and 2 change in this mode, but pins 3-9 have the same
functions. Contacts consist of open collector circuits capable of switching up to +40 VDC 50 mA
resistive load.
Pin 1: Remote Shutdown. If the UPS is using battery power and a +12-volt DC signal is applied
to this pin for 5 seconds, the UPS will shut down 30 seconds later. When the power outage
ends, the UPS will automatically restart. Signal and shutdown times and automatic restart
are programmable; see document FTS 502 for more information.
Pin 2: On Battery Status. When the UPS is using battery power, this pin produces a +12-volt DC
(RS232-level) signal.
Pin 3: Normally Open On Battery Contact. A normally open contact that closes 15
seconds after the UPS switches to battery power.
Pin 4: Common. The signal ground for all signal pins.
Pin 5: Normally Open Low Battery Alarm Contact. A normally open
contact that closes during a Low Battery, Near Low Battery, or Low
Runtime alarm. This pin tells CheckUPS and other shutdown
software when to start a computer shutdown. (You can enable this contact
for other alarms; for more information, call Best Power for document FTS
502.)
Pin 6: Plug and Play Sense for Windows 95.
Pin 7: Remote Shutdown. Shorting this pin to common turns the UPS off.
Pin 8: Unreg12 V isolated source.
Pin 9: Not Used.
5E. Remote Shutdown
You can set up the UPS for remote shutdown using contacts at the DB9 port. These contacts let
you shut down the UPS completely; it will not supply power to the equipment it protects. Your
remote shutdown switch must have a set of contacts that can short pin 7 on the UPS
communication port to pin 4 (common). This connection will shut down the UPS’ output power to
the protected equipment. When this happens, the UPS will sound alarm “Sd” for “shutdown”
(Morse code alarm H). When you are ready to restart the UPS, the shutdown switch must remove
the connection to pin 7 on the UPS communication port. Then, you can press the key to
restart the UPS. You can change the type of Remote Shutdown signal that the UPS responds to and
how quickly it responds. Call
Best Power’s Worldwide Service
for more information.
