Setup and Installation
18
ONePlus UPS User Instruction Manual
Table 1. Pin Signals for Supplied USB Cable
PIN #
Signal Name
Function
Position
1
Low batt
Low battery simulated contact; 20 mA, 30 VDC contact rating
Closes when low
Out
2
RxD
Receive from external device and shut down input
In
3
TxD
Transmit to external device
Out
4
—
No connection
—
5
GND
Signal common
—
6
AC fail
AC fail, simulated contact, open on fail; 20 mA, 20 VDC
contact rating
Out
7
—
No connection
—
8
—
No connection
—
9
AC fail
AC Fail, simulated contact, close on fail; 20 mA, 30 VDC
contact rating
Out
