TELEMECANIQUE TWIDO TWDLCAE40DRF

The Telemecanique (Schneider Electric) TWDLCAE40DRF is a high-capacity, “Compact” series PLC from the Twido family.¹ The “E” in the model name is particularly important, as it signifies that this unit has a built-in Ethernet port, which was a premium feature for the Twido range.

While the Twido series is now considered a legacy product (superseded by the Modicon M221), thousands of these units remain in operation worldwide in pump control, HVAC, and small-scale manufacturing.

1. Model Breakdown

The model name tells you exactly what hardware is inside:

• TWD: Twido Series.

• LC: Compact Base (everything in one housing).

• A: 100–240V AC Power Supply.²

   

• E: Integrated Ethernet (RJ45).³

   

• 40: Total I/O count (24 Inputs / 16 Outputs).

• DRF: Relay Outputs.

2. I/O Configuration

This unit is one of the largest in the compact range, providing a high density of points in a single block.

• Digital Inputs: 24 inputs (24V DC).⁴

   

• Digital Outputs: 16 Relay outputs (normally open).

• Expandability: Supports up to 7 additional expansion modules (TM2 series), allowing you to add more digital I/O, analog I/O, or temperature inputs.⁵

   

3. Connectivity and Communication

This model is the “hub” version of the Twido family:

• Ethernet Port (RJ45): Supports Modbus TCP/IP. This allows for easy integration with SCADA systems, HMIs, or other PLCs over a standard network.

• Serial Port 1: RS-485 (Mini-DIN).⁶ Used for programming or connecting to Modbus RTU devices.

   

• Serial Port 2: Optional expansion slot for an additional RS-232 or RS-485 port.

4. Technical Specifications

5. Key Features

• All-in-One Design: Includes the power supply, CPU, and I/O in one chassis, reducing installation time.

• Removable Terminal Blocks: Allows for quick replacement of the PLC without disconnecting every wire individually.

• PID Control: Supports simple PID loops for temperature or pressure control via software.