The diagram below shows the pin-outs of the alarm interface port.
If you wish to use the alarm interface port for custom applications, take into
consideration the following limitations.
• Pins 3, 5 & 6 are open-collector outputs, limited to switching 40V and
sinking 20mA of current.
• Pins 2 and 7 are RS-232 compatible outputs. They will switch from RS-
232 low (about -10V) to high (about +10V), and can drive a 25mA load.
• A positive (> 5V) pulse lasting longer than 1/4 second at pin 1 is required
to shut down the UPS during power failures. This pin is inactive when the
AC mains is normal.
• For best performance, your alarm monitoring circuit should be isolated (via
transformers, relays or optocouplers) from the rest of your network.
Should you have any questions
related to the UPS hardware,
please call TSi Power at (715)
623-0636. For software related
questions, please contact your
software vendor first.
¨
5
4
3
2
1
9
8
7
6
Pin #
1
6
2
7
3
4
9
5
Name
SHUTDOWN
ACFAIL (O-C)
ACFAIL
BATLOW
ACFAIL (O-C)
GND
GND
BATLOW (O-C)
Function
Input to UPS. A positive pulse 5V or higher and lasting longer than 1/4 sec will shut down
the UPS when it is running on battery power.
Open-Collector Output from UPS. Normally open, this transistor switch will close when AC fails.
Output from UPS. Normally low, this signal will go high when AC fails.
Output from UPS. Normally low, this signal will go high when about 2 minutes of battery reserve
power (at full load) remains.
Open-Collector Output from UPS. Normally closed, this transistor switch will open when AC fails.
Ground.
Ground.
Open-Collector Output from UPS. Normally open, this transistor switch will close when about 2
minutes of battery reserve power (at full load) remains.
RS-232
BAT NORMAL
BAT LOW
AC GOOD
AC FAIL
AC GOOD
AC FAIL
RS-232
BAT NORMAL
BAT LOW
NORMAL
SHUTDOWN
UPS INTERNAL ALARM CIRCUIT
Some older units may not be
equipped with all the functions
shown. Please call TSi Power
for more information.
¨
Network Installation & Alarm Interface
7
© Copyright—2000 TSi Power Corporation. All rights reserved.
TSi Power’s ongoing product improvement process makes specifications subject to change.
Other company’s product names herein are for identification purposes only and may be trademarks of their respective companies.
