Siemens simatic c7-621 - Digital Inputs

6-2
C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C621-01
6.1 Digital Inputs
The digital inputs have the following characteristics:
S 16 inputs, non-floating
S Rated input voltage: 24V DC
S Suitable, for example, for switches and 2-wire proximity switches
(BEROs)
Figure 6-1 shows the terminals and block diagram of the digital inputs.
Pin name
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
These shaded sections
are irrelevant for this
example.
Digital inputs
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
Block diagram of
an input
Bottom view of the C7-621
L+
M
NC
NC
Input DC 24V
Figure 6-1 Terminals and Block Diagram of the Digital Inputs
Characteristics
Terminals and
Block Diagram
C7-621 Digital I/Os