Communication port, 2 usb port: hid protocol – PowerWalker VI 750R User Manual

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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

DTR

Input

(tied to pin 6)

Common

Common (tied to
chassis)

DSR

Output

(tied to pin 4)

7 RTS

Input No

connection

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.