Maximum Number Of I/O Cards - Siemens ST950 Handbook

6.5

Maximum Number of I/O Cards

The total number of I/O cards that can be fitted to the ST950 Controller is limited by the
current capability of the controller's 24V DC logic power supply. See Table 20 for
details on the mix of cards that can be fitted to the controller. For simplicity, the CPU
I/O Card and the WiMag Standard Interface Card should be considered the same as a
24/4 Serial I/O Card.
Backplanes
IDBs Loops
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Table 20 – I/O Card and Detector Backplane Maximums
How to read Table 20:
1) Select the row that includes the required number of Intelligent Detector Backplanes,
i.e. the required number of loop detector inputs.
2) Then read across to determine the maximum number of inputs, outputs and Serial
I/O Cards that are supported.
Security classification
Version
Last Editor
Document Name
Copyright © Siemens plc 2015. All Rights Reserved.
Max Serial I/O cards
Cards In Out 24/16 24/4 24/0
0 6 144 96
16 6 144 84
5 120 80
32
6 144 68
48 5 120 80
64 5 120 64
4 96 64
80
5 120 48
96 4 96 52
3 72 48
112
4 96 36
3 72 48
128
4 96 20
144 3 72 32
2 48 32
160
3 72 16
2 48 20
176
3 72 0
1 24 16
192
2 48 4
208 1 24 16
224 1 24 0
240 0 0 0
Unrestricted
4
Paul Cox
ST950 General Handbook
Mobility Division, Traffic Solutions
Sopers Lane, Poole, Dorset, BH17 7ER
In
6 0 0 144
5 1 0 160
5 0 0 152
4 1 1 176
5 0 0 168
4 0 1 184
4 0 0 176
3 0 2 200
3 1 0 192
3 0 0 184
2 1 1 208
3 0 0 200
1 1 2 224
2 0 1 216
2 0 0 208
1 0 2 232
1 1 0 224
0 0 3 248
1 0 0 216
0 1 1 240
1 0 0 232
0 0 1 248
0 0 0 240
Page
Status
Date
Document No.
Mobility is a division of Siemens Plc
Totals
Out I/O
96 240
84 244
80 232
68 244
80 248
64 248
64 240
48 248
52 244
48 232
36 244
48 248
20 244
32 248
32 240
16 248
20 244
0 248
16 232
4 244
16 248
0 248
0 240
72 of 107
Issued
16-Jul-2015
667/HB/46000/000