S123xxxR.The Horstmann single phase S series smart programmable multi-rate meter provides simple, integrated and cost effective control of seasonal time of day (STOD) electricity tariffs and associated heating loads. Long life - 20 year certification Programmable up to 8 rates Integral load switching options High stability crystal clock LED consumption rate indicator Complies with BSEN 62053 and BS 7856 Optical communication interface compliant with BSEN 61107 Eight tariff registers plus totaliser and reverse energy (export) registers Fully programmable display configurations Mains syncronised internal clock (battery backed) Multi-rate weekday/weekend and seasonal tariff control Program random offset and soft start capability All features programmable via standard IEX/FLAG opto port.