Pin Allocation For The 25-Pin Sub-D "Alarm Out" Socket - Siemens SIMATRIX NEO V2 Configuration Manual

Installation
6.1.7

Pin allocation for the 25-pin Sub-D "Alarm out" socket

32
Siemens AB
Security Products
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
1 N.C.
2 N.C.
3 N.C.
4 Relay N.O. contact 1
5 Relay change-over contact 1
6 Relay N.C. contact 1
7 GND
8 Relay N.O. contact 2
9 Relay change-over contact 2
10 Relay N.C. contact 2
11 N.C.
12 N.C.
13 N.C.
Sub-D Alarm out socket allocation
Tab. 7
(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
Pin Function
14 Open-collector D0
15 Open-collector D1
16 Open-collector D2
17 Open-collector D3
18 Open-collector D4
19 Open-collector D5
20 Open-collector D6
21 Open-collector D7
22 Common connection for overload diodes (D0-
D7)
23 GND (for D0 - D7)
24 N.C.
25 N.C.