IEC62055-31, IEC62056-21 optical port, dual measurement, RF/PLC UIUs

The DDSY23S-F single-phase DIN rail STS prepayment meter is developed according to IEC62055-31 and STS certified. It switches between prepaid and post-paid modes and incorporates an optical port compliant with IEC62056-21. Dual measurement is adopted, and wired, RF, or PLC UIUs are optional.