Installation
6.1.7
Pin allocation for the 25-pin Sub-D "Alarm out" socket
The
Alarm out
socket contains 8 open-collector alarm outputs and two voltage-
free change-over contacts.
Fig. 17
Sub-D Alarm out socket
Pin Function
Pin Function
1
N.C.
14
Open-collector D0
2
N.C.
15
Open-collector D1
3
N.C.
16
Open-collector D2
4
Relay N.O. contact 1
17
Open-collector D3
5
Relay change-over contact 1
18
Open-collector D4
6
Relay N.C. contact 1
19
Open-collector D5
7
GND
20
Open-collector D6
8
Relay N.O. contact 2
21
Open-collector D7
9
Relay change-over contact 2
22
Common connection for overload diodes (D0-
D7)
10
Relay N.C. contact 2
23
GND (for D0 - D7)
11 N.C.
24 N.C.
12 N.C.
25 N.C.
13 N.C.
Tab. 7
Sub-D
Alarm out
socket allocation
(1)
Common connection of the overload diodes to the 8 open-collector outputs. It is only
necessary to wire in this way if switching of inductive loads such as relays is envisaged.
Connection must then be made to the plus pole of the voltage supply to the relay.
The cable connected to this socket must be no longer than 3 m.
Relay switching example
Fig. 18
Relay switching
32
Siemens AB
Security Products
