Dedicated Input Signals; Db-9 Port Pin Functions - Powerware 9170 User Manual

Dedicated Input Signals

Emergency Power-Off (EPO):
switch provides a method for emergency Powerware 9170 system
shutdown. Opening this connection creates an immediate shutdown of
the Powerware 9170 UPS output.
Bypass:
Powerware 9170 system for maintenance purposes, tells the UPS to go
into Internal Bypass mode.
On-Generator:
by a generator tells the UPS to accept wider input power frequency
limits.
See Figure 21 on page 31 and Figure 24 on page 34 to make the
connection for all dedicated input signals.

DB-9 Port Pin Functions

Table 10 explains the functions of the pins on the Powerware 9170 DB-9
port. This port is on the Powerware 9170 UPS rear panel, as shown in
Figure 42 on page 52.
Table 10. DB-9 Port Signals
Pin Function
1 RS-232 Receive Data
2 RS-232 Transmit Data
3 Normally-Open
On-Battery Contact*
4 Common
Powerware 9170 User's Guide
®
The signal from an external bypass switch, to isolate the
An external signal that the input power is being supplied
Description
Receives incoming RS-232 communication data. The data protocol is 9600 baud, 8 bits,
no parity, 1 stop bit, no handshaking.
NOTE
In battery operation, a 5-second +Vdc (RS-232 low) signal applied to this pin
causes the UPS to shut down after a delay of X minutes, regardless of the return of AC
input power. This time is defined by the External Shutdown mode parameter n, where n
and X are related as follows:
n X
0 2
1* 2
2 1
* For n=1, the UPS stays off when AC input power returns. For all other values of n, the
UPS restarts 12 seconds after AC input power returns.
Sends outgoing RS-232 communication data. The data protocol is 9600 baud, 8 bits, no
parity, 1 stop bit, no handshaking.
A normally open contact that closes (pulls to Common) 15 seconds after the UPS
switches to battery power.
The ground reference for all input and output signals.
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Connection to a facility Emergency Shutdown
n X n
3 3 6
4 5
5 10
Communication
X
20
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