32
4200FA Installation and Operation Manual
DB9 Female connector outline
(facing connector)
5
4
3
2
1
9
8
7
6
The connector pin assignment and female connector outline are illustrated below.
4.5.3
UPS Shutdown (via RS-232C)
When the UPS is operating from its internal batteries, a 'shutdown' order can be sent to the
UPS instructing it to turn OFF after a user-specified amount of time. This function can
allow you to stop discharging the UPS batteries after an orderly system shutdown has
been completed. The UPS can be programmed to turn OFF up to 8 minutes after the
'shutdown' command is given. This command can be cancelled before the specified time
has elapsed by following the directions listed on the RS-232C screen.
Pin
I/O
Symbol
Description
1
This pin is not used
2
Input
RXD
Receive Data
3
Output
TXD
Transmit Data
4
Output
DTR
Data Terminal Ready
5
-
SG
Signal Ground
6
Input
DSR
Data Set Ready
7
Output
RTS
Request To Send
8
Input
CTS
Clear To Send
9
This pin is not used
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