Connecting
5.3 Electrical configuration of the ET 200AL
Distributed I/O system
34 System Manual, 02/2018, A5E31861578-AF
Figure 5-3 Potential conditions of the ET 200AL distributed I/O system (Part 2)
Connection of a digital output with a digital input
Pay attention to the potential group
When a digital output is connected to a digital input, pay attention to the potential groups.
Depending on the configuration, 1M and 2M may then be connected, resulting in
elimination of the electrical isolation between 1L+ and 2L+. The possible compensating
currents can destroy the digital module.
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