Owner's manual

7. Slide the new batteries into EBM.

8. Reconnect the battery cable and screw up the battery bracket.

9. Close and reinstall the front panel back to EBM.

7. COMMUNICATION PORT

7.1 RS232 + Dry contact (750/1000/1500/2000/3000VA):

DB9 Female (RS232 +dry contact)

PIN # Description I/O Function Explanation

1 DCD Output Low Battery Output

(*normally open, pull

to Pin#5 when

battery low alarm in

battery mode)

2 RxD Output RxD

3 TxD Input TxD

4 DTR Input (tied to pin 6)

5 Common -- Common (tied to

chassis)

6 DSR Output (tied to pin 4)

7 RTS Input No connection

8 CTS Output AC Fail Output

(*normally open, pull

to Pin#5 when UPS

is in battery mode).

7.2 USB port: HID protocol

The USB and RS232 are unable to operate at the same time. Either

only USB or DB9 can connect with RS-232 at one time, usually

connecting with USB function is priority.