STS keypad prepaid energy/water/gas meter is a keypad type, automatically connection or disconnection prepaid energy/water/gas meter. It can be top up with SanfranPay vending software directly and communicate with AMI system via LORA-RF or PLC module(Smart type can work with wireless communication modules of NB-IoT/4G/3G/GPRS). The meters are comply with STS standard, can be widely used for counting the electricity consumption of users over a period of time.

Normal working temperature：-25℃～+55℃

Limit working temperature：-40℃～+80℃

Humidity：5%～100%

Atmospheric pressure：63.0kPa～108.0kPa (4000m above sea level and below)

Working power：Rated voltage 220V±30%

Frequency Range：50Hz, allowable deviation -6%～+2%

Display: LED indicator 

Interface type: 3 RS485 (1-way RS485 maintenance, 2-way meter reading), 1-way USB, 1-way modulated infrared interface, 1-way remote communication interface.

1. Excellent electromagnetic compatibility, can resist the interference of high-voltage spikes, strong magnetic fields, strong static electricity, lightning surges, and has a strong range of environmental adaptability.

2. Uplink communication adopts GPRS/CDMA/4G, Ethernet, optical fiber and other communication methods.

3. Downlink communication adopts 485 bus communication.

4. Wide voltage range design, make it more reliable and more adaptable to the working environment.

5. New maintenance concept: with powerful configuration function, device parameters can be easily modified locally/remotely, and online upgrade of local/remote software is supported.

6. Large-capacity motherboard, FLASH memory chip ensures convenient storage of various data.

7. Sealed design, using insulating and flame-retardant materials, wall-mounted structure, light in size and easy to install.