Gateway/DCU Solutions

Gateway/DCU Solutions

The GATEWAY / DCU is an intelligent device with built-in RS232, RS485 and RF modules to acquire data from clusters of energy meters or MFMs using inbuilt Modbus / DLMS Software’s. It also equipped with GSM/GPRS module to transmit the data to the remote data acquisition server. DCU is based on an ARM Cortex-A5 processor having 512MB of DDR2 memory and expandable NAND Flash memory up to 2GB. Edge / Sensor data can be stored locally using the onboard SD card option. The cloud interface is LTE with 2G/3G fallback.


  • SANDS DCU for AMR-AMI solutions is an optimized concept based on different communication interfaces Like RS232, RS485, RJ45, LPRF (ZigBee), GSM/GPRS.
  • Simple and compact design for easy installations.
  • Support for DLMS and Modbus meters.
  • Inbuilt battery-backed RTC
  • Automatic over the air configuration and firmware updates (FOTA).
  • Standalone AMR performance & Automatic profile download at specified intervals.
  • Compatible with various standard existing meters directly interfaced
  • Real-time tampering and outage alerts/notifications to MDAS server / Mobile phones of concern in-charges In the field through SMS.
  • Automatic GPRS connection(no AT commands required) and watchdog for reliable Communication
  • Compatible with all standard 2G / 3G / 4G SIM cards
  • In-built power supply (single-phase/three-phase) with battery backup.
  • Communication to central server via GSM/GPRS and Ethernet.
  • Inbuilt SD card for backup data storage.


1. Hardware & Software
  • Operating System: Linux v4.1
  • 32bit ARM CORTEX A5 processor
  • 256MB DDR2 RAM, 512 MB Flash (optional up to 512MB DDR2 RAM / 2 GB FLASH)
  • USB: 2.0, Other: Ethernet 10/100 Mbps, RS232
  • Time Synchronization – MDAS Server, GPRS network, GPS (optional), SNTP
  • LED Indications: Network, Power, and RF Data Communication.
  • Built-in Encryption for data security
  • Inbuilt Real Time Clock with battery backup ·
  • Connectivity: 4G fallback to 3G/2G
  • External SD storage up to 16GB ·
2. Communication Interface
  • Communication – Wireless (GPRS)
  • TCP/IP based communication over Ethernet
  • Protocol for Communication – DCU to MDAS: TCP/IP based socket communication/FTP
  • DCU to Meter: MODBUS/DLMS/Legacy protocols
3. Network Interfaces
  • 3/1.8VSIM Interface
  • Internal SIM card holder
  • Accepts standard SIM card / Micro
  • TCP/IP Server, TCP/IP Client, UDP, HTTP, FTP, PPP, CURL, DHCP etc
4. Power Supply
  • 100 V -270 V (AC/DC)
  • Over-current protection
  • Power reverse polarity protection
5. EMI/EMC specifications
  • Surge Immunity as per IEC 61000-4-5
  • Fast Transient Burst as per IEC 61000-4-4
  • Electrostatic Discharge as per IEC 61000-4-2
6. Environmental
  • Temperature: -10 °C to +70 °C
  • Operating Humidity < 95%, Non-Condensing


  • Automatic Meter readings (Electricity, Gas, Water meters)
  • Energy Auditing
  • Power Distribution and automatic load control.
  • Home automation Tariff Switching and automatic load control
  • Tariff Switching and automatic load control
  • Industrial Automation