The TWDLCDA24DRF from Schneider Electric's Twido series delivers reliable control for small to medium automation tasks. This compact base controller operates on a 24 V DC supply and provides a balanced mix of 14 discrete inputs and 10 relay outputs. Its design prioritizes space-saving installation without sacrificing performance. Specifically, the built-in non-isolated serial link supports Modbus RTU/ASCII communication, ensuring smooth integration with other devices. Furthermore, the controller includes event processing and PID functions, making it versatile for various industrial applications.
The TWDLCDA24DRF offers 14 discrete DC inputs with a voltage range of 20.4 to 28.8 V. These inputs are sink or source configurable, providing flexibility for different wiring schemes. The first two inputs (I0.0 to I0.1) draw 11 mA and have an impedance of 2100 Ohms. Meanwhile, the remaining inputs (I0.2 to I0.13) operate at 7 mA with a 3400 Ohm impedance. The controller also includes 10 relay outputs rated at 2 A for both 240 V AC and 30 V DC loads. Therefore, these outputs can directly drive small actuators and contactors.
This base controller requires a rated supply voltage of 24 V DC, with acceptable limits from 20.4 to 28.8 V. It draws 55 mA at 24 V DC for the outputs in the ON state. The internal logic operates at 5 V DC, consuming 36 mA when active. Additionally, the controller has a total power consumption of 8.7 W. For protection, it includes an internal fuse on the power supply, guarding against overcurrent faults.
For connectivity, the TWDLCDA24DRF includes a non-isolated serial link via a mini DIN connector. This link supports the Modbus protocol in RTU or ASCII modes, operating at up to 38.4 kbit/s. The controller can function as a master or slave on the RS485 network. It also features 3000 instructions of program memory, with 128 timers and 128 counters. Moreover, the unit offers 256 internal bits and 3000 internal words, providing ample storage for moderate logic applications.
This model supports up to 4 I/O expansion modules, allowing you to increase the total I/O count to a maximum of 120 points. Furthermore, it includes a slot for a memory cartridge or real-time clock cartridge. The TWDLCDA24DRF also incorporates an event processing function and PID control capabilities. Consequently, users can handle more complex control loops and time-critical tasks without extra hardware.
The controller boasts a compact footprint, measuring 90 mm in width, 95 mm in height, and 70 mm in depth. Its lightweight design weighs only 0.305 kg, which simplifies mounting on DIN rails. This small form factor makes it ideal for control cabinets with limited space.
Designed for industrial environments, the TWDLCDA24DRF operates within an ambient temperature range of 0 to 55 °C. For storage, it can withstand temperatures from -25 to 70 °C. It also performs reliably in relative humidity levels between 30% and 95% (non-condensing). The unit carries an IP20 protection rating, so it is suitable for installation inside enclosures. Additionally, it complies with UL and CSA standards, ensuring safety and reliability.
The controller demonstrates robust resistance to mechanical stress. It withstands vibrations of 0.075 mm from 10 to 57 Hz and 1 gn from 57 to 150 Hz when mounted on a DIN rail. For shock, it tolerates 15 gn for 11 ms. These specifications guarantee stable operation in environments with moderate vibration, such as those near heavy machinery.
Install the TWDLCDA24DRF on a standard 35 mm symmetrical DIN rail. First, hook the top of the unit onto the rail. Next, press the bottom firmly until it snaps securely into place. Ensure proper spacing around the module for ventilation and wiring access.
Connect the 24 V DC power supply to the designated terminals on the non-removable screw terminal block. Then, wire the 14 input devices and 10 relay output loads according to the sink/source configuration. The terminal block is clearly labeled, simplifying the wiring process. For the serial link, use the mini DIN connector to connect to your Modbus network.
If you need more I/O points, connect up to 4 expansion modules to the side of the base controller. The system automatically recognizes these modules upon power-up, making addition straightforward. Finally, ensure the total system current consumption does not exceed the power supply capacity.
The product package includes the following items:
TWDLCDA24DRF base controller unit
Non-removable screw terminal block (pre-installed)
User manual (quick start guide)
DIN rail mounting clips
Product identification label
Each unit is packed in a single carton measuring 10.5 cm x 12.5 cm x 12.5 cm. The total package weight is approximately 0.437 kg. For all deliveries, we use reliable couriers including FedEx, UPS, and DHL to ensure prompt and secure shipping.
1. Can the TWDLCDA24DRF be used as a Modbus slave device?
Yes, the TWDLCDA24DRF supports Modbus RTU/ASCII protocol and can operate as either a master or a slave on the RS485 network.
2. What is the maximum number of expansion modules for this controller?
This base controller supports up to 4 I/O expansion modules, allowing you to significantly increase your total I/O count.
3. Does the unit include a real-time clock for time-stamping?
The base model does not include a built-in real-time clock. However, you can add this feature via a real-time clock cartridge in the designated slot.
4. How do I set the input filter time for the digital inputs?
You can program the input filter time via the TwidoSoft software. The default hardware filters are 150 µs, and you can add a programmed filter time for specific inputs.
5. What is the difference between the TWDLCDA24DRF and the TWDLMDA20DRT?
The TWDLCDA24DRF features 14 inputs and 10 relay outputs, while the TWDLMDA20DRT has a mixed configuration with both relay and transistor outputs. Check your application’s output requirements to choose the right model.
| Brand Name | |
| Model No. | TWDLCDA24DRF |
| Product Type | Compact Base Controller |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
