Three-Phase UPS (10kVA-160kVA) Series
User Manual
2 Overview
27
Figure2-23
SNMP card position of Three-Phase (100kVA -160kVA) series UPS with two inputs
2.6.4 RS232 Communicaiton (Optional)
The UPS is without RS232 port. If user needs to use RS232 communication, please change the
reserved SNMP wires to RS232 wires.
The signal definition of reserved wire is as follows: pin1 is 0V signal, pin2 is 5V signal, pin3 is
sending signal, pin4 is receiving signal.
The user’s sending signal and receiving signal needs to connect to the UPS’ sending signal and
receiving signal crosswise (the 0V signal needs to be connected, 5V signal needn’t to be connected
but need to insulate for protection).
2.7 Other Optional Accessories
This series UPS can select different optional accessories to meet the requirements of different user.
2.7.1 Feedback Protection Device
If the battery mode and mains are not available, some voltage or energy inside the UPS may feedback
to any input terminal directly or through a leakage path, which is called "feedback". To minimize the
electric shocks hazard cased by feedback, it is suggested to install a feedback protection device. For
specific selection, please consult our company.
The installation diagram is as shown in Figure2-24.
