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38 Appendix 2 Communication Port Description
E1-20010329-C-1.0
Connection
alarm Signal
Pin . 1/2/3
（
normally open /common
normally close
）
failure Signal
Pin . 4/5/6
（normally open/common
/normally close
）
Bypass mode signal
Pin . 7/8/9
（normally open/common
/normally close
）
battery low Signal
Pin . 10/11/12
（normally open/
common / normally close
）
Shutdown Signal
Pin .14/15th Pin
（short circuited
normally , UPS shutdown when open
circuit
）
Connection of relays
alarm Signal Relay In normal state, Pin . 2/3 are short
circuited, Pin . 1/2 pins are short
circuited when alarm is activated .
failure Signal Relay In normal state, Pin . 5/6 are short
circuited, No. 4/5 pins are short
circuited when signal is activated.
Bypass mode Signal Relay In normal state, Pin . 8/9 are short
circuited, Pin .7/8 are short circuited
when signal is activated.
battery low Signal Relay In normal state, Pin . 11/12 are short
circuited_, Pin . 10/11 are short
circuited when signal is activated .
Shutdown Signal Relay Invalid when pin 14/15 are open
circuit , UPS will shutdown .
Relay Contact Capacity
250VAC 2A or 30VDC 2A