Pilz PSEN ml b 1.1 Operating Manual page 25

Wiring
}
UL requirement: The supply voltage to the safety switch must be protected with a quick-
acting fuse (see
}
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).
Operating Manual PSEN ml b 1.1/2.1/2.2, PSEN ml DHM
1005444-EN-02
Technical details [
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.
52]).
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