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Modicon M238 family of programmable logic controllers

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Modicon M238 compact logic controllers by Schneider Electric offer an "all-in-one" solution in a compact unit (157 mm × 118 mm × 86 mm excluding extension modules). Four models are available, with different embedded communications and supply voltages.

Models TM238 LDD24DT and TM238 LFDC24DT, powered with 24 VDC offer:

  • 14 × 24 VDC inputs, including eight fast inputs, dedicated to special functions such as high-speed counting (HSC)
  • 10 × 24 VDC solid state outputs, including four fast outputs, dedicated to special functions such as PWM and PTO.
  • An EIA-232/EIA-485 (RS-232/RS-485) serial link (SoMachine-Network, Modbus, ASCII protocols)

Model TM238 LFDC24DT also has:

  • A CANopen master link
  • A second EIA-485 (RS-485) serial link (SoMachine-Network, Modbus, ASCII protocols)

 Models TM238 LDA24DR and TM238 LFAC24DR, powered with 100 VAC to 240 VAC offer:

  • 14 × 24 VDC inputs, including 8 fast inputs, dedicated to special functions such as high-speed counting (HSC)
  • 4 × 24 VDC solid state outputs, dedicated to HSC reflex functions, and 6 relay outputs
  • An EIA-232/EIA-485 (RS-232/RS-485) serial link (SoMachine-Network, Modbus, ASCII protocols)

Model TM238 LFAC24DR also has:

  • A CANopen master link
  • A second EIA-485 (RS-485) serial link (SoMachine-Network, Modbus, ASCII protocols).

The number of I/O can be expanded on all four models by adding up to seven extension modules of the following type on the right-hand side of the base unit:

  • Discrete TM2 DDI/DDO/DMM/DRA
  • Analog TM2 AMI/ALM/ARI/AMO/AVO/AMM
  • Up to 3 high-speed counters TM200 HSC206DT/DF
  • Up to 2 AS-interface master modules TWD NOI 10M3.

Modems or communication gateways can be connected to the serial links in order to expand the connectivity capability to include Ethernet Modbus/TCP, Profibus DP, DeviceNet, etc.

The compact controller solution also has great flexibility in terms of wiring. With discrete I/O extension modules, several connection options are available, including removable screw terminals, spring terminals and HE 10 connectors, providing simple, quick, safe wiring. The Advantys Telefast ABE 7 prewiring system can be used for easy connection of extension modules with HE 10 connectors.