Overview
The Schneider Electric TWDLCAA24DRF is a compact base controller from the Twido family, designed for small to mid-range industrial automation tasks. This extendable PLC base unit supports up to 4 expansion I/O modules, making it flexible for applications that require scalability without a complete system overhaul. Though discontinued as of September 2024, this used unit remains a cost-effective solution for replacement, maintenance, or educational purposes.
Key Features
- 14 digital inputs (24 VDC) with sink/source logic configuration
- 10 relay outputs for controlling inductive and resistive loads
- 100–240 VAC power supply for global voltage compatibility
- Screw terminal connections for simple wiring
- One slot for optional serial port adapter (Modbus/character mode)
- 4 expansion slots supporting digital or analog I/O modules
- Internal RAM with 10-year lithium backup (30 days operation on battery)
- Integrated event processing and PID control functions
Technical Specifications
The controller features a 24-point I/O configuration: 14 discrete inputs and 10 relay outputs. Input voltage range is 20.4–28.8 V, with 11 mA maximum input current per channel. Relay outputs are rated for standard inductive and resistive loads. Power supply draws a maximum of 250 mA at 24 VDC. The unit measures 95 × 90 × 70 mm and includes a non-isolated mini-DIN serial link for Modbus RTU/ASCII communication at 38.4 kbit/s half-duplex. Data backup is provided via internal lithium battery with a 10-year retention guarantee.
Typical Applications
The TWDLCAA24DRF is well-suited for:
- Lighting management and HVAC control
- Building automation and access control systems
- Conveyor and lift control
- Machine monitoring and simple process automation
- Automatic dispensers and vending systems
- Industrial training and educational setups
Compatibility & Replacements
Compatible With
- Twido Compact series PLCs
- Modbus RTU/ASCII serial networks
- Twido engineering software and programming tools
- 4 expansion modules (digital or analog I/O)
Replaces / Drop-In Replacement For
- Other discontinued Twido compact base units (TWDLC series)
- Older Telemecanique controllers in similar form factor
Works With
- Twido software suite for PLC programming
- Modbus communication protocol (RTU/ASCII modes)
- RS485 and RS232 serial adapters
- Standard industrial 24 VDC control circuits
