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The 2400-M-R can use 2x 2400-R2 for a total of 32 relay outputs!
Replacement unit with Universal Isolated Inputs.

2400-M-R - Remote Station / Intelligent Multiplexer / Remote I/O:

Up to 16 Non-Isolated RTD Pt100/Pt1000 Inputs

4 Dedicated Digital Inputs

2 Relay Outputs

2 Analogue 4~20mA Outputs


Discontinued Product Line


Product Specifications:

Download Installation Guide

Note: Includes Modbus RTU and Modbus TCP information.

Download Station Programmer Configuration Software

Download Print Quality Image - 0.87MB.

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- RS232, RS422, RS485

- MicroScan

- Modbus RTU


  • Up to 16 Non-Isolated Inputs for RTD Pt100/Pt1000, -200~250°C (-320~320°F), with Plug In Terminals.
  • Each Input Individually Selected & Scaled.
  • 16 Bit Resolution.
  • Four Dedicated Digital, Isolated, Optocoupler Inputs.
    • State or Count.
    • Max speed 8000Hz.
  • Two Analogue, Isolated, 4~20mA Outputs.
  • Two Digital, Isolated, Relay Outputs.
  • Comms Ports:
    • Port 1: Isolated RS422/RS485.
    • Port 2: Isolated RS232/RS485.
    • USB programming port via XU-USB programming key.
  • RS422/RS485 Up to 1200m.
  • Cost Effective Radio Installation.
  • Cost Effective PC or PLC AI Expansion.
  • Clock/Reset Drive up to Four 2400-M-R / 2100-M input expansion.
  • Selectable Baud Rates.
  • Integral MODBUS Bridge to MicroScan data: 256 analogue (words), and 128 digital (bits).
  • Embedded protocols, Auto Detecting:
    • MicroScan ASCII,
    • Modbus RTU.
  • Average comms message, RS232, RS422, RS485 = 100msec.
  • 4 messages required to read all inputs.
  • Internal memory refresh rate for all channels = 4 secs.
  • Interface for 2400-R2 (16 & 32 Relay output expansion).
  • Easy Programming.
  • Programmable Station Number.
  • Programmable Relay States - NO or NC.
  • Comms Failure Time-out Using Relay 2.
  • Comms TXE Delay Programming.
  • Programming Information Retained on Power Down.
  • Universal AC/DC Power Supply (three options to select).
  • Compact 35mm DIN Rail Mounting.
  • Easy to Install.
  • Low Cost.


The 2400-M-R can multiplex up to 16 Non-Isolated RTD Pt100/Pt1000 inputs, into one output, selectable by a PLC or a Data Logging System.
It uses solid state switches, making it extremely reliable and durable. The PLC only requires two digital outputs and one analogue input to select and receive data from the 2400-M-R.

XU-USB USB Programming Key for programming 2400-M-R using Station Programmer software.

(Same Key as used for programming XU Series transmitters, 2400-A16, Z-2400-Sleeper, Z-2400-A2 Series, IN-uP4 and uP4-Din).
Note: The 2400-M-R can also be programmed via the Comms Ports using MicroScan SCADA V5.1 software.


Terminals and Layout:

Note: The 2400-M-R has no user serviceable parts.

2400-M-R terminals and layout