ADDITIONAL UPS FEATURES
Avaya
t
S9RM UPS Site Preparation, Installation and Operator’s Manual
S
05147387 Rev C
44
The Alarm Adapter
The Alarm Adapter has a 9-pin and a 25-pin communication port. The
9-pin port provides standard serial communication, and the 25-pin port
provides isolated signals.
The cable pins are identified in NO TAG and the pin functions are
described in Table 2 and Table 3.
Alarm Adapter
12
10
6
9
8
7
5
3
4
2
11
1
24
22
18
21
20 19
17
15
16
14
23
25
3
8
7
9
1
6
2
4
5
13
Figure 23. The Alarm Adapter
Table 2. 9-Pin Assignment
Pin Number
Signal Name
Function
Direction from
the UPS
1
—
No connection
—
2
TxD
Transmit to external device
Out
3
RxD
Receive from external device
In
4
DTR
PnP (Plug and Play) from external
device (tied to Pin 6)
In
5
GND
Signal common
—
6
DSR
To external device (tied to Pin 4)
Out
7
—
No connection
—
8
—
No connection
—
9
Power
Source
+V (8 to 24 volts DC power)
Out