User manual

Always “On” UPS Systems Inc.
11 Version 2.2
6.3. Computer Interface Port
The communication port on the back of the UPS may be connected to a
host computer. This port allows the computer to monitor the status of the
UPS and control the operation of the UPS. Its major functions include the
following:
1. The ability to broadcast a warning when the power fails.
2. The ability to close any open files before the battery reserves are
exhausted.
3. The ability to turn off the UPS.
4. The ability to make the UPS perform a self-test.
Some computers are equipped with a serial connector to link with the
communication port, in some cases a special plug-in card may be needed.
6.4. Open Collector (Dry Contact) Communication
[Pins for the GES-801V, GES-102V and GES-152V]
(Pins for the GES-222V)
1. Pin [8] (5) and [6] (2) are open collector outputs that must be
pulled up to a common referenced supply no greater than
+40VDC.
2. The transistors are capable of a maximum non-inductive load of
25mADC, use pin [5] (4) as the common.
3. Pin [8] (5) generates a High to Low signal when the battery inside
the UPS has less than 5 minutes back up time left.
4. Pin [6] (2) generates a High to Low signal when the line has
failed.
Pin [3] (7) will shut down the UPS is a high is sustained for 0.36
seconds.
6.5. RS-232 Communication
[Pins for the GES-801V, GES-102V and GES-152V]
(Pins for the GES-222V)
5. Pin [3] (7) is the RS-232 data input from computer (RX).
6. Pin [2] (6) is the RS-232 data output to computer (TX).
7. Pin [4] (8) is the RS-232 data transmit bit (DTR).
8. Pin [7] (9) is the RS-232 data receive bit (RTS).
9. Pin [5] (4) is the common or computer ground.
NOTE:
1. Switch rating +40V, 25mADC non-inductive.
2. Pin 7 should be connected to computer ground only.