The RMS680 combines local sensor, actuator and serial interfaces with a cost-effective satellite modem. Software controllable events, RS485 and discrete input/output lines make the RMS680 a highly flexible hardware component of M2M’s remote monitoring services.

Whether using standalone or with RTU/PLC, native Modbus support on the RMS680 provides a direct connection to common industrial automation equipment, for quick and easy installation.

Download Spec Sheet

  • Class 1
  • Division 2
Power 12 or 12 Vdc.
RS485 1
Digital Inputs 2

Features & Benefits

  • Class 1 Division 2, Groups A, B, C, D certified terminal meets industry standards for electronic equipment in Oil and Gas markets.
  • Expanded operating temperature range allows reliable deployment in some of the world’s most demanding environments.
  • Modbus protocol interfaces directly with common SCADA devices such as RTU, PLC and flow meters to quickly and easily implement reporting and telemetry capabilities for remote equipment.
  • Immediate reporting of digital status change (all data sent with report).
  • RS485 serial interface allows connection to SCADA devices over large distances to enable flexible deployment in a wide range of operating conditions.
  • Discrete inputs enable monitoring of local devices not using Modbus.
  • Seamless global coverage based on the Inmarsat satellite constellation enables operational benefits in remote regions.
  • Over-the-air programming enables M2M to remotely reconfigure parameters such as threshold levels or report frequency.



  • Size: 160mm (diameter) x 47 mm (height). Mounting kit adds 70mm to height
  • Mass: ~535 g


  • Operating Temperature: -40°C to +85°C
  • Storage Temperature: -40°C to +85°C
  • Humidity: 95% Relative Humidity at +30°C non-condensing
  • Dust & Water Ingress: IP67/NEMA-4X
  • Vibration: 5-20 Hz; 1.92 m2/s3 random noise. 20-500 Hz: -3dB octave random noise
  • Shock (survival): Half sine 6ms, 300 m/s2


  • Input Voltage: 9 VDC to 32 VDC
  • Power Consumption (Typical @ 12VDC)
  • Transmit mode: .75 W
  • Hibernate mode: 100mA
  • RS485 ESD: ± 15kV HBM
  • Mating Connector: Conxall Mini-Con-X® 6282-8SG-3DC

External Interfaces

  • Serial: RS485: MODBUS RTU interface
  • I/O:
  • Qty (1) Digital input (reserved for run status)
  • Qty (1) Digital (selectable as input or output; max sink 250mA)

Certification Compliance

  • Satellite: Inmarsat Type Approval
  • Satellite Service: Two-way Global iSatDataPro

Performing Capabilities

  • Core Services: Position reporting
  • Lua script engine
  • Low power modes
  • Modbus

Satellite Communications

  • Frequency: Rx: 1525.0 to 1559.0 MHz & Tx: 1626.5 to 1660.5 MHz
  • EIRP: <7 dBW
  • Elevation Angle: +20 to +90 degrees
  • GPS
  • Acquisition: Cold-start: 34s
  • SuperSense®: -148 dBm
  • Accuracy: 3 m CEP; 5 m SEP

Satellite Messaging

  • From Terminal: Up to 6,400 bytes
  • To Terminal: 10,000 bytes