153 Product Description3.7.3 Power Supply3.7.3.1 Power SuppliesYou can use a commercially available power supply with an output voltage of 24 V that meetsthe protective separation requirements. See section 6.1.2 Electrical Safety – Requirements toBe Met by Third-party Manufacturers.3.7.3.2 FN20, FN30-20 Power SupplyNOTICEThe FN20 (115 V) is UL Listed approofed.WARNING!InstalationThe 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 contactDanger 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 extralow 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 powersupply is designed for top-hat rail mounting (for F300K can be supplied as an option with builtin an IP65 housing).The power supply is equipped with safety output relays (to EN 298) for mains AC voltage. Thepower 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 wiresof the connecting cable to the terminals. You have to connect the surplus wires to separateterminals. 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
