... of multi-rate (time-of use) energy measurement, infrared carrier wave communication and RS485 serial port communication reading meter ... and port of set the tariff, input control voltage 0-90 Vac, set up tariff F1, input control voltage 150-400 Vac, set up tariff F2, ... terminals cover, may select extension terminals cover, in order to protect to use safety. (Product Configuration code is BM). Outer ...