The Schneider Electric TWDDDI8DT is a compact and reliable digital input module designed to expand the I/O capacity of your Twido PLC system. This module efficiently monitors up to 8 discrete 24V DC signals from pushbuttons, limit switches, and sensors. Additionally, its flexible sink/source logic configuration ensures compatibility with various field devices and wiring practices. The TWDDDI8DT serves as an excellent solution for applications that require a small number of additional inputs.
This section details the key technical parameters that define the performance of the TWDDDI8DT.
Input Specifications: The module provides 8 discrete input channels. It operates with a nominal 24V DC voltage, with acceptable limits from 20.4V to 28.8V DC. The rated input current is 7 mA per channel at 24V DC, which is powered by an input impedance of 3.4 kOhm.
Input Logic and Wiring: The discrete input logic supports both sink and source configurations, providing great flexibility for connecting to different sensor types. The module uses a removable screw terminal block for all I/O connections, simplifying wiring and maintenance. It features a single common point for all 8 inputs.
Performance and Filtering: Each input has a built-in filter time of 8 ms for both state 0 and state 1 transitions. This filtering helps to reject high-frequency noise and contact bounce, ensuring stable and reliable signal reading. Moreover, the TWDDDI8DT provides photoisolator insulation of 1500 Vrms for one minute between the input channels and the internal logic.
Power Consumption: For power budgeting, note that the TWDDDI8DT consumes just 5 mA at 5V DC when all inputs are at state 0. However, when all 8 inputs are energized (state 1), consumption rises to 25 mA at 5V DC.
Understanding the physical and operational limits of the TWDDDI8DT is crucial for a successful installation.
Operating Environment: The module is rated for an ambient air temperature between 0°C and 55°C during operation, and can be stored in temperatures from -25°C up to 70°C.
Protection and Certifications: It carries an IP20 protection degree, making it suitable for installation in a clean, dry control cabinet. The TWDDDI8DT holds CSA and UL certifications and is CE marked, confirming its compliance with international safety standards.
Installing the Schneider TWDDDI8DT module is a straightforward process, but following these steps will ensure reliable operation.
Mounting: First, ensure the Twido base unit is powered off. Attach the TWDDDI8DT to the right side of the controller or an existing expansion module using the built-in clip mechanism.
Wiring: After mounting, wire your field devices to the removable screw terminal block. A key feature of this module is that the terminal block is detachable, allowing you to pre-wire it before installation or easily remove it for maintenance.
Configuration: Following physical installation, proceed to the software configuration. Use the Twido programming software to define the TWDDDI8DT and configure its inputs according to your application's logic.
Verification: Finally, apply power and test each input by manually activating connected sensors. Monitor the input status LEDs on the module to confirm the signals are correctly received and processed by the PLC.
When you order the TWDDDI8DT, it will be securely packaged to prevent damage during transit. The packaging typically includes:
(1) Schneider Electric TWDDDI8DT discrete input module
(1) Quick start guide
(1) Product information sheet
Please note: The product does not come with installation tools or wiring harnesses.
We ship all orders via premium courier services. Your order will be dispatched using Fedex, UPS, or DHL, depending on your location and shipping preferences.
A1: The TWDDDI8DT is a dedicated expansion module designed specifically for the Schneider Electric Twido range of programmable logic controllers.
A2: No, this module is designed exclusively for DC signals. It accepts a 24V DC input voltage. Applying AC voltage to the TWDDDI8DT may damage the module.
A3: This means the module offers flexible wiring, supporting both positive (source) and negative (sink) common voltage configurations. This is a key feature for adapting to different sensor types and power supplies.
A4: The module uses a removable screw terminal block, which is a key advantage over connector-based models. You can wire your sensors directly to the block and then plug it into the module, simplifying installation and maintenance.
A5: The TWDDDI8DT draws 5 mA at 5V DC when all inputs are off. When all 8 inputs are on, it consumes 25 mA at 5V DC.
| Brand Name | |
| Model No. | TWDDDI8DT |
| Product Type | Discrete Input Module |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
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