SLLSEY7G June   2017  – February 2025 ISO1211 , ISO1212

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Power Ratings
    6. 5.6  Insulation Specifications
    7. 5.7  Safety-Related Certifications
    8. 5.8  Safety Limiting Values
    9. 5.9  Electrical Characteristics—DC Specification
    10. 5.10 Switching Characteristics—AC Specification
    11. 5.11 Insulation Characteristics Curves
    12. 5.12 Typical Characteristics
  7. 6 Parameter Measurement Information
    1. 6.1 Test Circuits
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Sinking Inputs
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Setting Current Limit and Voltage Thresholds
          2. 8.2.1.2.2 Thermal Considerations
          3. 8.2.1.2.3 Designing for 48V Systems
          4. 8.2.1.2.4 Designing for Input Voltages Greater Than 60V
          5. 8.2.1.2.5 Surge, ESD, and EFT Tests
          6. 8.2.1.2.6 Multiplexing the Interface to the Host Controller
          7. 8.2.1.2.7 Status LEDs
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Sourcing Inputs
      3. 8.2.3 Sourcing and Sinking Inputs (Bidirectional Inputs)
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Development Support
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Related Links
    4. 9.4 Receiving Notification of Documentation Updates
    5. 9.5 Support Resources
    6. 9.6 Trademarks
    7. 9.7 Electrostatic Discharge Caution
    8. 9.8 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

8.1 Application Information

The ISO1211 and ISO1212 devices are fully-integrated, isolated digital-input receivers with IEC 61131-2 Type 1, 2, and 3 characteristics. These devices are designed for high-channel density, digital-input modules for programmable logic controllers and motor control digital input modules. The devices receive 24V to 60V digital-input signals and provide isolated digital outputs. No field side power supply is required. An external resistor, RSENSE, on the input signal path precisely sets the limit for the current drawn from the field input. This current limit helps minimize power dissipated in the system. The current limit can be set for Type 1, 2, or 3 operation. The voltage transition thresholds are compliant with Type 1, 2, and 3 and can be increased further using an external resistor, RTHR. For more information on selecting the RSENSE and RTHR resistor values, see the Section 8.2.1.2 section. The ISO1211 and ISO1212 devices are capable of high speed operation and can pass through a minimum pulse width of 150ns. The ISO1211 device has a single receive channel. The ISO1212 device has two receive channels that are independent on the field side.

ISO1211 ISO1212 Switching Characteristics for IEC61131-2 Type 1, 2, and 3 Proximity SwitchesFigure 8-1 Switching Characteristics for IEC61131-2 Type 1, 2, and 3 Proximity Switches