Communication

Dedicated Input Signals

Emergency Power-Off (EPO): Connection to a facility Emergency Shutdown switch provides a method for emergency Powerware 9170 system shutdown. Opening this connection creates an immediate shutdown of the Powerware 9170 UPS output.

Bypass: The signal from an external bypass switch, to isolate the Powerware 9170 system for maintenance purposes, tells the UPS to go into Internal Bypass mode.

On-Generator:An external signal that the input power is being supplied 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

Description

 

 

 

 

 

 

 

 

1

RS-232 Receive Data

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

n

X

n

X

 

 

0

2

3

3

6

20

 

 

1*

2

4

5

 

 

 

 

2

1

5

10

 

 

*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.

2

RS-232 Transmit Data

Sends outgoing RS-232 communication data. The data protocol is 9600 baud, 8 bits, no

 

 

parity, 1 stop bit, no handshaking.

 

 

 

3

Normally-Open

A normally open contact that closes (pulls to Common) 15 seconds after the UPS

 

On-Battery Contact*

switches to battery power.

 

 

 

4

Common

The ground reference for all input and output signals.

 

 

 

Powerware® 9170 User's Guide ￿ LTM-1344 B Uncontrolled Copy

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