The Schneider Electric TWDLCDA40DRF belongs to the Twido family of compact base controllers. It delivers 40 total discrete I/O points on a single unit. You get 24 digital inputs and 16 digital outputs for your control applications.
This controller accepts 24V DC inputs with sink or source logic. The output section combines two transistor outputs and 14 relay outputs. Many engineers choose this model because of its flexible output types. Relays handle AC or DC loads up to 2A. Meanwhile, transistor outputs handle fast switching for positioning tasks.
Furthermore, the TWDLCDA40DRF includes advanced built-in functions. You can use event processing for time-critical reactions. The PID controller handles analog process loops without extra modules. Additionally, two PWM/PLS channels run at 7 kHz for motion control.
The TWDLCDA40DRF operates on a rated supply voltage of 24V DC. The supply limits range from 20.4V to 28.8V. Inrush current stays below 35A. An internal fuse provides power protection.
Input characteristics vary by terminal assignment:
I0.0 to I0.1: 11 mA current, 2100 Ohm impedance
I0.2 to I0.5: 7 mA current, 3400 Ohm impedance
I0.6 to I0.7: 11 mA current, 2100 Ohm impedance
I0.8 to I0.23: 7 mA current, 3400 Ohm impedance
Filter times differ between input groups as well. Fast inputs I0.0 to I0.5 have a 35 µs turn-on delay. I0.6 to I0.23 take 40 µs to turn on. Turn-off delays measure 40 µs for I0.0 to I0.5 and 150 µs for I0.6 to I0.23. You can add programmed filter time to each group.
Output specifications include:
Transistor outputs: 2 channels at 7 kHz for PWM or PLS functions
Relay outputs: 14 channels rated at 2A at 30V DC or 240V AC
Relay mechanical life: 20 million cycles minimum
Relay electrical life: 100,000 cycles minimum
The Schneider Electric TWDLCDA40DRF stores your program in internal RAM. A lithium battery backs up this memory for 30 days. The battery charges in 10 hours and lasts 10 years. Program memory holds 3000 instructions.
Processing speed reaches 1 ms per 1000 instructions. System overhead adds only 0.5 ms. Memory resources include:
3000 internal words
256 internal bits
128 timers
128 counters
The real-time clock drifts less than 30 seconds per month. It runs for 30 days on battery backup. Four counting channels operate at 5000 Hz with 16-bit resolution. Two additional channels run at 20,000 Hz with 32-bit resolution.
The TWDLCDA40DRF includes a non-isolated serial link. It uses a mini DIN connector. This port supports Modbus protocol in RTU or ASCII modes. You can configure it as a master or slave device.
Communication parameters include:
Physical layer: RS485 half duplex
Maximum speed: 38.4 kbit/s
Supported modes: Modbus, character mode
Adapter option: RS232C/RS485 interface converter
This serial link allows connection to HMIs, drives, and other Modbus devices. You can also use it for programming and monitoring. For larger systems, the controller accepts up to seven I/O expansion modules. Total I/O can reach 264 points with HE-10 connectors.
The Schneider Electric TWDLCDA40DRF measures 90 mm wide, 95 mm high, and 70 mm deep. It weighs 0.525 kg. Wiring connects through non-removable screw terminal blocks. This ensures secure connections in high-vibration environments.
Operating temperature ranges from 0°C to 55°C. Storage temperature spans -25°C to 70°C. Relative humidity stays between 30% and 95% without condensation. The IP20 protection rating suits control cabinet installation.
Vibration resistance depends on mounting method. On a DIN rail, it handles 0.075 mm from 10 to 57 Hz and 1gn from 57 to 150 Hz. On a panel, it withstands 1.6 mm from 2 to 25 Hz and 4gn from 25 to 100 Hz. Shock resistance reaches 15gn for 11 ms.
Isolation ratings include 1500Vrms between channels and internal logic. Dielectric strength measures 1500V between I/O and earth terminals. Supply to earth terminals withstands 500V. Immunity to microbreaks lasts 10 ms.
TWDLCDA40DRF compact base controller (1 unit)
Non-removable screw terminal blocks (pre-installed)
Lithium battery (pre-installed)
Note: No cables, certificates, or warranty documents are included in the package.
Shipping methods: FedEx, UPS, DHL
1. Can the TWDLCDA40DRF handle analog signals?
Yes, this controller includes built-in PID functions for analog process control. However, you need external analog sensors. The two analog adjustment points (0-1023 and 0-511) provide internal reference values.
2. How do I expand I/O beyond the built-in 40 points?
The Schneider Electric TWDLCDA40DRF supports up to seven expansion modules. Total I/O can reach 264 points. You can mix digital and analog expansion modules as needed.
3. What happens when the battery fails?
The lithium battery backs up internal RAM for 30 days. If the battery fails, you lose stored data. Replace the battery every 10 years as preventive maintenance. The controller continues running but memory becomes volatile.
4. Can I use both relay and transistor outputs simultaneously?
Absolutely. The 14 relay outputs handle AC loads or slow DC switching. The 2 transistor outputs handle high-speed applications like PWM or pulse positioning. Each output type operates independently.
5. Is the TWDLCDA40DRF compatible with TwidoSoft software?
Yes, TwidoSoft programs this controller. You can connect through the mini DIN serial port using an RS485 to USB converter. The software supports all built-in functions including PID and event processing.
| Brand Name | Schneider Electric |
| Model No. | TWDLCDA40DRF |
| Product Type | Compact Base Controller |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
