Installation
6.1.5
Pin allocation for the 37-pin Sub-D alarm 1 - 16 and alarm 17 – 32 sockets
The
Alarm 1 - 16 / TTY out
and
Alarm 17 - 32 / TTY out
sockets each have 16
alarm inputs, rated to +5V using internal pull-up resistors. The TTY outputs are set
to a data rate of 2400 Baud and use the SCU protocol.
Fig. 11
Alarm 1 - 16 and Alarm 17 – 32
Caution
Do not connect –TX to GND, as the negative voltage will
short-circuit to GND and place an unnecessary load on the
power supply unit.
Pin
Alarm input function
Pin TTY function
1
Alarm input
1
20
–TX TTY 1
2
Alarm input
2
21
+TX TTY 1
3
Alarm input
3
22
–TX TTY 2
4
Alarm input
4
23
+TX TTY 2
5
Alarm input
5
24
–TX TTY 3
6
Alarm input
6
25
+TX TTY 3
7
Alarm input
7
26
–TX TTY 4
8
Alarm input
8
27
+TX TTY 4
9
Alarm input
9
28
–TX TTY 5
10
Alarm input
10
29
+TX TTY 5
11
Alarm input
11
30
–TX TTY 6
12
Alarm input
12
31
+TX TTY 6
13
Alarm input
13
32
–TX TTY 7
14
Alarm input
14
33
+TX TTY 7
15
Alarm input
15
34
–TX TTY 8
16
Alarm input
16
35
+TX TTY 8
17
GND 36
GND
18
GND 37
GND
19
GND
Tab. 4
Pin allocation for the Alarm 1 -16 37-pin Sub-D socket bar
Technical specifications and allocation identical to the alarm input modules of the SIMATRIX 648.
27
Siemens AB
Security Products
