GPRS communication Single Phase Keypad Prepaid Energy meter

            GPRS Communication Single Phase Keypad

                           Prepaid Energy meter

Main Features

• Energy Measurement

Total and time-sharing forward active & reactive energy measurement

Total and time-sharing reverse active & reactive energy measurement

Save last one to sixteen months energy data

• 20 digit Standard Transfer Specification(STS)

Credit data transfered from a point of sale (POS) or vending system is made into a numeric token  in a 20 digit number using the Standard Transfer Specification (STS) encryption techniques, which comply with IEC62055 protocol

•  Load control function

When the residual energy is 0 or the allowable overdraft that both sides agreed, this meter will send out power-off signal to have load switch cut off power. The power will be recovered automatically after inputting new purchased energy amount.

• Programmable low credit warning

The meter can be programmed for setting user credit warning threshold, When the meter’s residual energy is equal to credit warning threshold, the meter will start the audio & video warning function in a way of warning light flashing

• Tamper detection

With event recording function (including cover-opening event, tamper event and power failure event)

• Optical port interface

Support IEC62056-21 protocol, 1200bps for communication

• RS-485 serial interface

Support IEC62056(DLMS/COSEM) protocol, 2400bps for communication

• LCD display

Number of digits value field Up to 8, Digit size 4x10mm

• Communication modules

GPRS module:EGSM900/DCS1800 dual-band, support GSM/GPRS phase2/2+ protocol

PLC module: according to Technology Standards of SSC163X ,center frequency 270K, FSK modulate technolgy