3.3.5 Connecting The Onboard I/Os Of The S5-95U - Siemens SIMATIC S5-90U System Manual

Installation Guidelines

3.3.5 Connecting the Onboard I/Os of the S5-95U

Use the following parts to connect the onboard I/Os of the S5-95U.
• 40-pin front connector for digital inputs and outputs
• 15-pin sub D connector for analog inputs and outputs
• 9-pin sub D connector for interrupt and counter inputs
Connecting Digital Inputs and Outputs
The signal cables to the digital I/Os must be connected to a 40-pin front connector.
Two types of front connectors are available:
• Front connectors with standard screw-type terminals (see Section 3.3.1)
• Front connectors with crimp-snap-in terminals (see Section 3.3.1)
Every input and output (channel) has a terminal assigned to it on the front connector. The 16 inputs
(IN) and the 16 outputs (OUT) are numbered from 32.0 to 33.7. Use a 24 V DC power supply for all
digital inputs and digital outputs.
Example: A field device is connected to input I 32.4. A lamp is connected to output Q 33.3.
Outputs
* For the power supply of outputs
32.0 to 32.7, L+ must be connected
at least to terminal 1 and M to terminal 10;
outputs 33.0 to 33.7 are to be supplied
by connecting L+ at least to terminal 11
and M to terminal 20.
24 V DC
Figure 3-22. Wirings of the Front Connector for Digital Inputs and Outputs
Note
All digital inputs and outputs are connected to a common ground, i.e. they are non-
floating.
3-22
*
OUT
L+
a b
1
2
32.0
32.1 3
4
32.2
5
32.3
6
32.4
7
32.5
8
32.6
9
32.7
M
10
L+
11
33.0
12
33.1
13
33.2 14
33.3
15
33.4
16
33.5 17
33.6
18
33.7 19
M
20
Inputs
IN
L+
1
2
32.0
3 32.1
4
32.2
5
32.3
6
32.4
7
32.5
8
32.6
9
32.7
10
11
24 V DC
33.0
12
33.1
13
14 33.2
33.3
15
33.4
16
17 33.5
33.6
18
19 33.7
M
20
EWA 4NEB 812 6115-02b
S5-90U/S5-95U