23
6.
Computer and Alarm connections
At the back of the UPS is an interface allowing direct communication with your computer system,
the location of which can be found in figure 2. There is a RS232 serial data interface, one USB data
interface and an emergency power off switch supplied. However, the RS232 port cannot be used
when the USB interface is in use.
In addition there is an optional interface slot that allows you to install different communications
cards. It can be used parallel with either the RS232 or USB ports.
Currently there are two cards available for the optional interface slot. An SNMP/WEB card allows
management and monitoring over a network or internet, and the AS/400 card allows voltage free
relay contacts. Your local dealer will have more information about these option cards.
Connecting the UPS to a Computer
The communication device for the UPS and PC comes as a complete package with power
management software. Only the communication cable provided with UPS may be used to connect to
your computer, which is accomplished through the UPS RS232 port. Also ensure that the operating
system on your computer is supported. Instructions provided in the power management software
will help with this installation.
Other advanced power protection solutions such as SNMP are provided by your dealer.
RS-232 Standard Interface port
The RS-232 interface uses a 9-pin female D-sub connector. This information consists of data about
utility, load and the UPS. The interface port pins and their functions are identified in the following
table.
Pin #
Signal name
Direction (re UPS)
Functions
2
TxD
Output
TxD Output
3
RxD
Input
RxD / Inverter Off Input
5
Common
Common
