MOD-AN

RS485 MODBUS analog acquisition module

Field analog signal scanning over RS485 bus with MODBUS protocol.

  • 3 analog inputs
  • Power 9–36 VDC
  • MODBUS RTU
Hardware RS485 MODBUS analog acquisition module — MOD-AN

Adding one more analog reading — pressure, temperature, level — to a telecontrol system shouldn't mean swapping out the RTU. This module takes up to 3 signals of 4-20mA or 0-5V from any sensor and delivers them over Modbus RTU on RS-485, ready to plug into the remote unit or gateway you already have installed.

  • Integrates with what you already have

    Speaks Modbus RTU over RS-485, the same protocol your RTUs and gateways already use.

  • Compatible with any 4-20 mA or 0-5 V sensor

    Not tied to any sensor brand: it accepts the standard output of most transmitters on the market.

  • Takes up little space

    Two DIN-rail modules wide — the same footprint as a two-pole breaker.

  • Built for demanding conditions

    Operates from -40°C to +85°C indoors, suitable for cabinets and cubicles with extreme temperatures.

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01Technical specifications

Technical specifications

  • Power supply

    • Power supply range: 9 to 36 VDC
    • Low power consumption
    • Power supply protected against overvoltage, reverse polarity and transients

  • Analog acquisition

    • 3 analog inputs
    • 12-bit resolution
    • Measurement range: 4-20 mA / 0-5 V

  • Communications

    • Modbus RTU protocol
    • Baud rates from 1200 to 115200 bps
    • Modbus address configurable via DIP switch

  • Mechanical specification

    • 35 mm DIN rail mounting
    • Width equivalent to 2 DIN modules (like a two-pole breaker)
    • Indoor use
    • Operating temperature: -40°C to +85°C

02Main applications

Main applications

  • Pressure measurement on OF cables
  • Transformer temperature measurement
  • Reading level sensors in tanks or cisterns
  • Expanding analog inputs on RTUs with limited channels
  • Acquiring signals from third-party sensors with 4-20 mA or 0-5 V output
  • Monitoring auxiliary variables in substations and transformer centers

Solutions using it

Where it is deployed

03Other products

Other products

Need this unit, or a variant of it?

We adapt inputs, outputs, protocols and operating logic to the requirement. Tell us what you need to solve.

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