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