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3 Product Description
3.7.3 Power Supply
3.7.3.1 Power Supplies
You can use a commercially available power supply with an output voltage of 24 V that meets
the protective separation requirements. See section 6.1.2 Electrical Safety – Requirements to
Be Met by Third-party Manufacturers.
3.7.3.2 FN20, FN30-20 Power Supply
NOTICE
The FN20 (115 V) is UL Listed approofed.
WARNING!
Instalation
The wires must be installed/attached in such a way that, if a wire is unintentionally loosened,
a sufficient distance is still maintained between SELV/PELV and the other voltages.
WARNING!
Secure output contact and secure indicator contact
Danger due to electric shock! This may result in personnel injury.
Basic insulation is used for protective separation, i.e. you may not use SELV (safety extra
low voltage) and mains voltage at both of the contacts at the same time.
You can use the FN20 power supply to operate the F300K at mains AC voltage. The power
supply is designed for top-hat rail mounting (for F300K can be supplied as an option with built
in an IP65 housing).
The power supply is equipped with safety output relays (to EN 298) for mains AC voltage. The
power supply complies with SIL 2 (Safety Integrity Level) to EN 61508.
When you connect the F300K to the FN20 power supply, you do not connect all of the wires
of the connecting cable to the terminals. You have to connect the surplus wires to separate
terminals. These terminals are part of the F300K's IP65 housing.
You will find the technical specifications for this power supply in section 14.1.3.1 FN20, FN30-
20 Power Supply.
Fig. 3-7 FN20 for top-hat rail mounting
Fig. 3-8 FN20 as a built-in unit
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General