SINGLE/THREE PHASE KEYPAD PREPAYMENT ACTIVE ENERGY METER

The DDSY28/DTSY541 is a keypad type Prepayment Energy Meter. Users can purchase energy credit through vending network to get a serial number (named as "TOKEN"), and then use the keypad of meter to enter the TOKEN. The available credit will be added into the meter after the TOKEN being accepted. The TOKEN contains 20 encrypted digits. For the purchasing method reason, the meter also named as "Keypad meter". It complies with open standard STS. Payment feature realized by encrypted 20 digits token Alarm for Low Credit / Overload / Fraud. Availability of RS485 and Optical Port for meter reading and configurations. Terminal cover opening detection alarm.