Alarm Function - AEG IST7 User Manual

2 Overview
Monitor card includes two network ports: MODBUS port is used for the communication of
MODBUS, RS485 port is used for the communication of RS485.
The definition for MODBUS port is as follows: pin3 is A, pin6 is B.
The definition for RS485 port is as follows: pin1 is A, pin8 is B.
Besides, the monitor card contains 6 standard dry contact ports (3 ports are input dry contact,
the others are output dry contact), detailed definition is as shown in Table2-4, Table2-5.
Table2-4 Standard output dry contact illustration
Silk-
NO.
screen
1 ND1
2 ND2
3 ND3
Table2-5 Standard input dry contact illustration
Silk-
NO.
screen
1 EPO1
2 EPO2
3 ND4

2.3.3 Alarm Function

Once the UPS abnormal, it will send sound & light alarm. Some alarm or protection function
of the UPS is as shown in Table2-6.
18
Signal
UPS FAULT signal
Mains FAIL signal
BAT. LOW signal
Signal
External EPO normal open input
signal
External EPO normal closed
input signal
It can be set to external battery
breaker or external maintenance
bypass breaker.
Function illustration
When the signal is valid, COM and NO is closed,
COM and NC is opened. The allowable voltage-
withstand is 250V/1A.
Signal
When the signal is valid, NO and
COM is short-circuit.
When the signal is valid, NC and
COM is open-circuit.
When the signal is valid, NO and
COM is short-circuit.
IST Series UPS (10kVA-200kVA)
User Manual