V01.00 | 2020/07
21
6.3.1
24 V Supply (SELV/PELV)
WARNING
Incorrect or defective power supply unit
Danger to life due to dangerous voltages on touchable parts
Only use SELV or PELV power supplies in accordance with EN ISO 13849-2, which
allow a maximum of 60 VDC or 25 VAC in the event of a fault.
External supply of sensors and actuators
Sensors and actuators with external power supply can also be connected to TBPN-
L5-4FDI-4FDX. The use of SELV or PELV power supplies must also be guaranteed for externally
supplied sensors and actuators.
Decoupling of external electrical circuits
Decouple circuits that are not designed as SELV or PELV systems by means of optocouplers, or
other measures.
WARNING
Potential differences
Dangerous additions of voltages
Avoid potential differences between internal and external load voltage supplies
(24 V DC).
