Siemens Simatic S7-300 - Wiring a Digital Module with Terminal Block for a Three-Conductor Connection

SIMATIC TOP Connect and SIMATIC TOP Connect TPA
8-17
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Connecting the power supply
Observe the wiring rules in Table 8-3 on page 8-7.
With some digital modules, two jumpers are generally required for connecting the
supply voltage (refer to Table 8-9 on page 8-16).
You can wire the jumpers either in the front connector or in the terminal block.
Irrespective of this, you must interconnect the two Plus terminals and the two
Minus terminals.
Connecting the terminal block for three-conductor connection
1
2
3
4
5
6
7
8
9
10
Front connector
Terminal block
– +
11
12
13
14
15
16
17
18
19
20
L+
M
–
+
Terminal block
Jumper (2)
Jumper (1)
Jumper (1) or jumper (2) required
Figure 8-9 Wiring a Digital Module with Terminal Block for a Three-Conductor Connection