2 Overview
MR33 Series (75K-600K) Modular UPS
User Manual
22
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Figure2-15
System monitor card
Table2-7
Illustration for system monitor card
NO. Name
Illustration
○
1
Output dry contact
○
2
Input dry contact
See Table2-9.
○
3
EPO2 input dry contact
External EPO normal closed input port. When NC and COM is
open-circuit, the signal is valid. The signal is preset and cannot
set.
○
4
RS232 communication
port
It supports RS232 communication. Pin definition: Pin4, Pin6: Tx;
Pin3, Pin5: Rx
○
5
MODBUS/RS485
communication port
The communication protocol supports MODBUS RTU or kehua
standard serial port protocol. It can set switch by touch screen. Pin
definition: Pin3
、
Pin5
：
A
；
Pin4
、
Pin6
：
B
○
6
MDU port
Communication port of touch screen.
Output dry contact
Table2-8
Function illustration for output dry contact
NO. Silk-screen Signal
Function description
1
ND1
UPS FAULT
signal
When the signal valid, COM and NO is closed, COM and
NC is opened. Allowable withstand voltage is 250V/1A. The
signal is preset and cannot set.
Summary of Contents for MR33 Series
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