EM141 - GSM/GPRS/EDGE Terminal with Enhanced I/O ports

Salient Features

  • Intelligent GSM/GPRS/EDGE Dual Band Terminal
  • RS232, RS485 and USB ports
  • 8 Digital Ports (configurable as 8 DIs or 4 DOs+4DIs),
  • 2 Analog Input Ports (configurable as Voltage Input or 4-20mA)
  • 1 Analog Output Port
  • 1.9MB flash memory and 1 MB RAM
  • Embedded software for data acquisition, processing and communication
  • Over The Air (OTA) firmware updation
  • Customizable standard or proprietary protocols
  • Rugged Extruded Aluminum enclosure

General Specifications

  • Dual Band EGSM 900/1800 MHz
  • GPRS class 10
  • Output power
    • Class 4 (2 W) @ 900MHz
    • Class 1 (1 W) @ 1800 MHz
  • Mobile station class B
  • CSD Data transmission up to 9.6 kbps
  • 2 Analog Input Ports (configurable as Voltage Input or 4-20mA)
  • 8 Digital Ports (configurable as 8 DIs or 4 DOs+4DIs)
  • 1 Analog Output port
  • Memory: 1 MB (RAM) and 1.9 MB (Flash)
  • Over The Air updation of software
  • SMA antenna connector
  • 1 x RS232C serial interface
  • 1 x RS485 serial interface
  • SIM card interface 3V, 1.8V

Embedded Firmware Features

This device can have standard or customized embedded firmware as per user requirements
The embedded firmware of this device can be changed or updated Over The Air via GPRS/EDGE. Hence, visits to the sites to upload new embedded firmware can be avoided

The embedded firmware can include following features.

  • Serial Data capture
    • Listen to the Serial port for data from connected device(s) and capture the data received
    • Communicate on standard protocol like MODBUS with client devices connected on RS485 bus
    • Periodical or event based data collection from connected device(s)
    • Logs captured data and send it to the external world using GPRS or SMS
    • Supports communication using protocols like Socket, HTTP, FTP or Email
    • Processes captured data and generate events and send alerts to specified mobile numbers or to the server
    • Generate alert message on communication failure with connected device(s)
  • Digital Inputs
    • Continuous monitoring of digital inputs
    • Generate events and sent alarms via SMS/Email to selected group of numbers/addresses
    • Configure alarm messages and group of recipients to whom alarms are to be sent for individual input port
    • Provision for reminder alerts and escalated alerts
    • Provision for ring alerts in the event of critical alerts
  • Digital Outputs
    • Remotely activate/deactivate digital output ports via SMS commands
    • Activate/Deactivate connected devices based on various events
    • Activate/Deactivate digital outputs on scheduled basis
    • Above mentioned features can be used for simple automation processes
    • Complete authentication for remote commands
    • Confirmation messages after executing commands
  • Analog Inputs
    • Accepts 0-2V or 0-10V analog inputs
    • Accepts 4-20 mA analog inputs
    • Provision to configure conversion factor, measurement unit
    • Provision to log analog reading on periodical basis
    • Setting up of upper and/or threshold limits
    • Generation of events and alerts when threshold values are crossed
    • Customizing alert message formats
    • Setting values based on remote commands or on event basis.
  • Analog Output
    • Can generate voltage output to control an external device
    • Generated voltage can be based on a defined logic
    • Can also set voltages on the basis of authorized commands
    • Can be used for simple automation
  • Desktop Configuration
    • Desktop configuration software for configuring the terminal
  • Remote Configuration
    • Configure all important parameters via SMS
    • Full authorization for configuration commands
    • Confirmation for configuration messages
    • Auto restart of the terminal after remote configuration, if required


  • Remote Data Acquisition using SMS/FTP or Socket
  • Remote Monitoring and Control
  • Data Logging, Processing and Communication
  • Simple Automation
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