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Pin Allocation For The 25-pin Sub-d "alarm Out" Socket - Siemens SIMATRIX NEO V2 Configuration Manual

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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.

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