MY-A Series (10kVA-20kVA) UPS
User Manual
2 Overview
13
Table2-5
The corresponding pin relationship of RS485 port between of UPS and PC
RS485 port of UPS
RS485 port of PC
A
A (+)
B
B (-)
The standard RS485 communication ports of rear panel cannot communicate normally when slot 2
uses optional communication card.
Dry contact
The control of dry contact signal or alarm information can be achieved by communication dry contact.
Dry contact function can be set through the touch screen.
Figure2-7
Dry contact position
Relay dry contact capacity is 277Vac/30VDC/10A, relay coil voltage is 12V.
Table2-6
Dry contact functions illustration
No.
Silk-screen
Function illustration
Remarks
Dry
contact 1
OUT.1
NC
Trigger action when signal is valid: NO and
COM is connect, which disconnect with NC.
The signal is settable and refers to the note for
detail. Default is mains abnormal.
NC: close
normally;
NO: open
normally;
NO
COM