Series-Connected Electromechanical Sensors - Siemens Sinamics G120 Function Manual

Installing
4.4 Controlling via a fail-safe digital input
4.4.2.2

Series-connected electromechanical sensors

You can connect electromechanical sensors, for example, Emergency Stop command devices,
position switches in series.
If the sensors are simultaneously opened, then sensor faults can only be identified with some
restrictions.
If there is a risk of cross-circuits or short-circuits, the cables between the sensor and the inverter
must be protected, for example, by routing them in a steel tube.
The inverter supplies the power supply voltage
The 24 V supply is not required when using the G110M option "24 V power supply", article number
1)
6SL3555-0PV00-0AA0
Figure 4-10 Connecting electromechanical sensors to the inverter power supply in series
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Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD