Wiring
Operating Manual PSEN ml b 1.1/2.1/2.2
1003884-EN-12
| 24
5.3 EMC requirements
} Ensure the wiring and EMC requirements of EN 60204-1 are met.
} UL requirement: The supply voltage to the safety switch must be protected with a quick-
acting fuse (see Technical details [ 65]).
} The inputs and outputs of the safety switch must have a protective separation to voltages
over 60 VDC.
} The power supply must meet the regulations for extra low voltages with protective elec-
trical separation (SELV, PELV).
INFORMATION
Only use safety relays with a 24 VDC supply voltage. Safety relays with a
wide-range power supply or in AC device versions have internal potential
isolation and are not suitable as evaluation devices.
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