Automatic Meter Reader G -71 :
The G-71 AMR is an intelligent quad band GSM/GPRS modem useful for communication with various branded energy meters. The modem is suitable for long duration data transmission. It supports inbound/outbound/event based dialing and has built in RTC, memory and rechargeable Li-ion battery. It comes with RS232 port serial interface for connecting to the external devices. Viz. Energy Meters etc.
Modem is suitable for communication with electronic energy meters installed at various substation feeders, DTR, HT and LT Consumers. The system useful for remote energy meter reading via GPRS infrastructure. The modem offers inbuilt intelligence, by which data from the meter is read at designated intervals and forwarded to central station (as configured) for view and analysis via MDAS.
1. Quad -Band GSM/GPRS Engine GPRS Class B Multi slot class 12.
2. Fully compliant with ETSI GSM Phase 2+ specifications
3. Inbound/Out bound dialing & event based dialing facility.
4. Multiple Communications protocol support Meter specific Protocol/API , MODBUS,
DLMS,IEC1107 etc and flexible to incorporate any new meter reading protocol without effecting to
existing protocols.
5. Intelligent Firmware has facility for data Store and forward.
6. Communicates with various branded meters
7. Data Communication with server through embedded TCP/IP, FTP protocols
8. Supports Multi-tasking ,high data rate
9. Remote configuration of schedules, meter reading intervals etc.
10. Firmware over the Air (FOTA) feature for remote download of firmware.
11. In-built SMPS power supply with 6KV surge protection.
12. Inbuilt Real Time Clock (RTC) with time synchronization facility.
13. 3.7V/2200 mAh internal battery backup
14. Protection against modem hanging due to Network coverage issues, abnormal power situation
and external Interference etc.
15. SMA connector interface for connecting external antenna.
16. EMI/EMC Compatible
Specification:
| Processor | 32 bit ARM CPU |
| Memory | 640 KB Flash memory, 2MB SRAM, 4MB data flash |
| Communication | Quad Band 850/900/1800/1900 MHz , GSM/GPRS,SMS,CSD |
| GSM RF Power | Class 4 (2 W) at GSM850 and EGSM 900 MHz Class 1(1W) at DCS1800 and PCS 1900MHz |
| Interface/Connectors | a) RS-232 (9 pin D-type Connector). b) SIM Card Holder c) SMA connector for GSM Antenna |
| Optional |
a) Micro SD card b) RS485 port (Standard RJ45 connection) c) Customized Software d) Optical Port cable |
| LED Indications | a) Red-LED for Li-Ion Battery Status b) Red-LED for GSM Power / Network c) Yellow-LED for RxD d) Green-LED for TxD |
| Operating Voltage | AC Input 3-Phase /4 wires, 90- 440 V AC,50Hz OR 1-Phase/2 wires, 63.5-370V AC, 50 Hz.,6KV Surge Protection |
| Battery | Rechargeable Li-ion 3.7V/2.2 Ah for power back up, 3V/225mAh for RTC back up. |
| Enclosure | Anodized Aluminum Extrusion. |
| Accessories | 3/5dB Whip Antenna. |
| Mounting | Wall Mounting / Chassis mountable / Table top. |
| Temperature | Operating : - 20°C to 70°C Storage: -25°C to 70°C |
| Humidity | 95% RH non condensing |
| EMI/EMC | Compatible |
| Dimensions in mm | 160 x 130 x 45 ( L x w x H) |
| Weight | 550 grams (Approx.) |
System Concept and Architecture Diagram :
