CURRENT LIMITED OVER-VOLTAGE PROTECTED QUAD DIGITAL TERMINATION

The CLT3-4B is a quadruple logic input termination for sensor or mechanical switch interfaces. It is designed to work in 24 VDC applications such as PLCs (programmable logic controllers), PACs (programmable automation controllers) and distributed I/O systems used in factory automation.

The device optimizes the input VI characteristic to reduce its power dissipation. This becomes critical when the application cabinet or housing requires higher protection levels such as IP65 and IP67. These closed cabinets are used in various automated lines including the food and chemical industry.

The power dissipated inside the module is very limited as there is usually no air circulation inside the box. The current limitation also reduces the power losses in the sensor.

The most important aspect of the CLT3-4B is the electrical protection and susceptibility its brings to the application. The CLT3-4B implements efficient protection diodes on each input and supply voltage line. Serial resistors ensure a higher level of susceptibility of the entire input module.

Thanks to its compact TSSOP20 package CLT3- 4B device occupies very little space on the PCB compared to an equivalent discrete solution.

Key Features

  • For IEC61131-2 type 1 and 3 inputs
  • Fully integrated internally fixed current limiter
  • 4 input channel topology
  • Wide range supply voltage and temperature operation
  • Optocoupler output drive

Circuit Diagram

0 Download

Resources

Technical Documentation

Product Specifications
Description Version Size
Current limited over-voltage protected quad digital termination 5.2 188 KB
Application Notes
Description Version Size
CLT3-4BT6 demoboard: check the robustness of CLT3-4BT6 1.4 106 KB
Technical Notes & Articles
Description Version Size
Packing information for IPAD™, protection, rectifiers, thyristors and AC Switches 5.0 1 MB

Publications and Collaterals

Flyers
Description Version Size
Current-limiting terminations for automation digital inputs 2.1 400 KB
ST Protection Finder - The new app for Android and iOS 1.0 1 MB
Selection Guides
Description Version Size
Protection devices and integrated EMI filtering selection guide 2.0 743 KB
Brochures
Description Version Size
Products and Solutions for Factory Automation and Control 2.0 3 MB

Tools and Software

Development Tools
Software Development Tools
Support & Community


Sample & Buy

Part Number Package Packing Type Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
CLT3-4BT6 TSSOP 20 Tube Active 1.474 1000 NEC EAR99 MALAYSIA MORE INFO DISTRIBUTOR AVAILABILITY
CLT3-4BT6-TR TSSOP 20 Tape And Reel Active 1.474 1000 NEC EAR99 MALAYSIA MORE INFO Get Sample Add to cart DISTRIBUTOR AVAILABILITY
test

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
CLT3-4BT6 ActiveTSSOP 20IndustrialEcopack2
CLT3-4BT6-TR ActiveTSSOP 20IndustrialEcopack2
test

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

×