InduBox GSM M4

InduBox GSM M4

LTE Cat.1 / GPRS Modem
The InduBox GSM M4 modem is an industrial 4G modem with GPRS fallback. It is built on the design robustness and component quality of 20 years of InduBox modem experience. The modem has several operating modes such as transparant serial communication through RS-485, NAT routing up to 8 devices and RTU functionalities such as IEC 60870-5-104/Modbus (TCP or RTU) mapping. The modem is powered by a wide range AC power supply, DC powering is available as an option. It includes a watchdog circuit to insure continuous operation. The modem uses a Sierra Wireless communication module and has galvanically isolated RS-232 and RS-485 interfaces.

Everything is managed by a powerful Cortex M4 microcontroller. The modem is built into a wall mountable and sealable housing with a separate terminal cover.
The modem can be equipped with other communication modules on demand. Most modules are available for global use (or NAM, EMEA and APAC only).
As all M4 products, the modem can be remotely managed for security, firmware upgrades, remote parametrization...


  • Industrial GSM/GPRS/3G/LTE Cat.1 modem for metering, SCADA & IoT applications
  • Transparant communication
  • Routing capabilities connecting up to 8 devices
  • SCADA capabilities: IEC 60870-5-104/Modbus RTU (or TCP) mapping
  • IoT capabilities: MQTT/Modbus RTU (or TCP) mapping
  • Backoffice Management (Q1 2019): Firmware upgrades, Remote parametrization, Commissioning, 'Health Check' ...
  • RS-485 & Ethernet interface
  • Watchdog reset
  • Firmware upgrade to 'micro RTU' IEC 60870-5-104/Modbus mapping
  • Modem upgradeable to NB-IoT/LTE CatM1 etc. (Sierra Wireless modules)


  • Housing:
    Bausch InduBox IP51 housing / Bottom enclosure and sealable terminal cover : ABS with self-extinguishing V0 additive / Transparent cover : polycarbonate + self-extinguishing V1
    Dimensions with connector cover : 180 x 108 x 71 mm
    Dimensions without connector cover : 145 x 108 x 71 mm
  • Environmental:
    Temperature in use: -25°C / + 55°C
    Humidity in use: 10% - 75% (non-condensing)
  • Power Supply:
    Wide Range AC-power supply Input voltage range : 90 – 253 Vac
    Input frequency : 47 – 63 Hz
    Power: 3.5 Widle - 4.5 Wmax
  • Engine:
    Host Processor: Cortex-M4 (STM32Fxx)
    The modem has 4 working modes :
    4.Basic TCP/IP routing
    used to IP connect a serial non-IP device in PULL mode
    used to IP connect a serial non-IP device in PUSH mode
    used to access a device with a standard TCP/IP LAN connection
    WAN Communication: Sierra Wireless CF3 HL footprint
    HL6528 – quad band GSM/GPRS & GSM Data HL6528RD – quad band GSM/GPRS
    HL8518 – dual band HSPA, GSM/GPRS/EDGE HL8548 – quad band HSPA, GSM/GPRS/EDGE HL7690 – FDE band LTE Cat-1
    HL7692 – FDE band LTE Cat-1 with dual band GSM/GPRS/EDGE fallback
    HL7800 – LTE Cat-M1, Cat-NB1
    HL7802 – LTE Cat-M1, Cat-NB1 with dual band GSM/GPRS fallback
    SIM card and/or eSIM eUICC possibilities
    Firmware: Dual memory flash bank redundancy Different local and remote update possibilities
    Diagnostics: Detailed debug and trace information on different levels via / different interfaces 8 status LEDs
    Configuration: Local via HTML GUI Remote via HTML GUI & Telnet commands
    Furthermore, thanks to the Bausch 'M4' design, it is possible to implement other functions on the InduBox GSM M4 hardware design; for example a modbus (RS-485) to IEC 60870-5-104 gateway.
    5. SCADA RTU IEC 60870-5-104/Modbus RTU (or Modbus TCP) mapping
    6. IoT MQTT /Modbus RTU (or Modbus TCP) mapping
  • Interfaces & Connectors:
    RS-232 full V.24, non-isolated (also used for debugging) RS-232 3-wire, galvanically isolated
    RS-485 2-wire, galvanically isolated LAN 10/100Mbits/s
    Input / Output: 1x DI non-active 5 - 25Vdc
  • Antenna: 50 ohm FME antenna connector
  • Reset: Watchdog, keep alive check On different levels, working mode dependent: Periodical hardware reset / Triggered by transmitted/received data Periodical PING response check
  • Back Office services:
    Firmware upgrade
    Remote Parametrization
    Automatic Commissioning
    Health Monitoring
  • Security: TLS & VPN IPsec (ikeV.1)
  • Protocols: Modbus RTU, Modbus TCP, MQTT, IEC 60870-5-104, FTP, ...
  • Certification: CE / TST25-3

Additional Info

  • folderDatasheet
  • foldergeneral
  • foldermanuals
    • file_download 20230131 InduBox GSM M4 RTU application manual V1.0.pdf
    • file_download 20230131 InduBox GSM M4 modem application manual V1.0.pdf
    • file_download 20230313 InduBox GSM M4 hardware manual V1.5i.pdf
    • file_download 20230925_RV_InduBox GSM M4 hardware manual V1.5i_FR.pdf
    • file_download 20230926 InduBox GSM M4 modem application manual V1.0_FR.pdf

Log in to reply

arrow_upward Back to Top