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5.3.1 24 V supply (PELV)
External Supply of Sensors/Actuators
Please observe, that sensors/actuators with an external power supply can be connected to
TBPN-L1-FDIO1-2IOL. In this case,
please observe the power supply through PELV supply units as
well.
Decoupling of External Electrical Circuits
External electrical circuits not designed as PELV-circuits have to be decoupled via optocoupler, relay
or by other measures.
WARNUNG!
Potential differences
Dangerous additions of voltages
Avoid potential differences between internal and external load voltage supplies
(2
4 V DC).
WARNUNG!
Wrong selection of the 24 V power supply unit
Dangerous voltage and loss of functional safety
Only use power supply units with PELV according to EN50179/BDE016 (PELV).
Assure that the maximum output voltage not exceeds 32 V even in case of an error.
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