25
700 Communication
701 The Communication Port
The DB9 Communication Port on the UPS back panel provides two types of signals: open collector optocouplers
and serial (RS232).
For RS232 communication, the data format is
Baud Rate:
2400 bps
Data Length:
8 bits
Ending Code:
1 bit
Parity Bit:
None
The pins at the port have the following functions:
*Note: “Contacts” are open collector optocouplers.
702 CheckUPS Software
The UPS comes with an interface cable and CheckUPS Advanced software for power monitoring and (if
desired) automatic computer shutdown during long power outages. To use the software, follow the instructions
in the installation section to connect the cable to the UPS. Then, follow the instructions on the CheckUPS CD
jacket to install CheckUPS software.
5
4
9
2
7
1
6
3
8
Pin Number
Description
1
Not used.
2*
Normally open contact that closes when input power fails.
3*
Normally closed contact that opens when input power fails.
4*
Common for pins 2, 3, and 5.
5*
Normally open contact that closes on low battery.
6
Remote shutdown (when input power is not available and the unit is in battery mode). Keeping this pin
high (+5 to +12V) for one second turns off the UPS inverter when no input power is present. (For
RS232 communication, this pin is Receive Data, RX.)
7
RS232 ground.
8
Not used.
9
RS232 Transmit Data (TX).
Figure 19
