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U S E R M A N U A L
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6. Communication
A USB and an RS-232 port are available to enable
communication between the UPS and a remote
computer/ station. Only one communication port
can be active at a time and priority is given to the
USB port.
Once the communication cable is installed, the
power management software can exchange
information with the UPS. The software collects
information from the UPS and indicates the
status of the device, the power quality of the
mains and the battery autonomy of the units.
If there is a power failure and a predicted
shutdown of the UPS due to low battery
autonomies, the monitoring system can save the
load data and initiate shutdown of the equipment
connected to the UPS.
NOTE!
6.1 RS-232 port
The UPS has an RS-232 port for UPS monitoring,
control and firmware updates. To establish
communication between the UPS and a computer,
connect one end of the serial communication
cable to the RS-232 port on the UPS and the other
end to the RS-232 port of a computer.
The cable pins for the RS-232 communication
port are described in Figure 5.1-1 and Table 7.
—
6.1-1
RS-232 Communication
Port (DB-9 Connector)
Lengths of cables shall not exceed
10 m
Keep routing of communication
cables separated from mains supply
AC and DC cables
Table 7: Communication port pin assignment
Signal
PIN
Function
name
2
TxD
Transmit to external device
3
RxD
Receive from external device
5
GND
Signal common
6.2 USB port
The UPS can communicate with USB-compliant
computers that run power management
software. To establish communication between
the UPS and a computer, connect the USB cable
to the USB port on the UPS. Connect the other
end of the cable to the USB port on a computer.
6.3 Emergency power off
The EPO connector can be used to block the
output of the UPS in case of an emergency.
The EPO connector can be configured as Normally
Closed (NC) or Normally Open (NO) through the
USB or RS232 port.
By default, the EPO connector is Normally Closed
(NC) by a jumper in the rear panel. If the jumper is
removed, the UPS output will not supply power to
the load until the EPO status is changed. It's
necessary for UPS normal operation to change
EPO connector to Normally closed status. Then,
the EPO warning will clear and UPS will be
back to Bypass mode. It's necessary to turn on
UPS manually.
33
Direction
from UPS
Out
in
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