Siemens SIMATIC ET 200MP System Manual page 70

Wiring
6.8 Front connector for the I/O modules
7. Wire the power supply element (Figure 8).
Wiring front connectors for I/O modules with shield contact element
1. Begin to completely wire the front connector (Figure 1).
2. Strip the cable shielding.
70
Terminals 41/42 and 43/44 are galvanically connected to each other. If you connect the
supply voltage to 41 (L+) and 44 (M), then with terminals 42 (L+) and 43 (M) you can loop
the potential to the next module.
ET 200MP Distributed I/O System
System Manual, 01/2013, A5E03723484-01