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S5-95F
4.2.1
Using the Failsafe, Onboard Digital Inputs
The onboard digital inputs are located on the right-hand side of the 40-pin connector. They are
galvanically isolated from the internal reference potential of the basic unit.
How to Connect the Onboard DI
Connect the 24 V DC load voltage (L+ potential to terminal 1, L- potential to terminal 20).
Connect the sensor to the digital output selected. You can connect either single-channel or two-
channel failsfafe sensors.
Connection of Single-Channel, Failsafe Sensors (Type B)
Subunit A
OUT
L+
24 V DC
-
L
Figure 4-8. Connection of a Single-Channel, Failsafe Sensor
EWA 4NEB 812 6210-02
IN
L+
1
1
2
2
3
3
4
4
DI 32.2
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
-
L
Installing and Connecting the Basic System
Subunit B
OUT
IN
L+
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
-
L
Single-channel,
failsafe sensor
DI 32.2
4-9
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