Yes, the PP20 power pack can be operated at 220VAC and 50 hz. Frequency has very little affect on the operation of the power pack, but the voltage does have a large effect. The PP20 is designed to operate at 277VAC, so operating at a lower voltage will lower the current output on the low voltage side.

AC Input | DC Output | DC Output After Energizing Relay |

220 volts @ 60 Hz | 15 volts, 53 mA | 15 volts, 13 mA |

220 volts @ 50 Hz | 15 volts, 52 mA | 15 volts, 12 mA |

240 volts @ 60 Hz | 15 volts, 80 mA | 15 volts, 40 mA |

240 volts @ 50 Hz | 15 volts, 82 mA | 15 volts, 42 mA |