Yokogawa ADV142-S02 Digital Input Module

The Yokogawa ADV142-S02 is a high-reliability Digital Input (DI) module engineered for demanding industrial applications within Yokogawa’s CENTUM VP and ProSafe-RS platforms. It is used to interface with external digital field devices, receiving discrete signals such as switch statuses, contact closures, or binary indicators.

This module supports 16 channels of voltage-free digital input, each optically isolated to prevent ground loop interference and signal degradation. The ADV142-S02 is particularly suited for applications where safety integrity and signal precision are critical, such as in Safety Instrumented Systems (SIS) or Emergency Shutdown (ESD) systems.

With its compact footprint, environmental resilience, and diagnostic features, the ADV142-S02 is an excellent choice for engineers seeking durability, integration flexibility, and long-term operational stability in digital input interfacing.

Product Specifications

Product Applications

The ADV142-S02 is designed for digital signal acquisition in mission-critical process control and safety systems. Its applications span a wide range of industries:

• Oil and Gas: Monitoring valve positions, pressure switches, and emergency pushbuttons in hazardous environments.

• Chemical Plants: Receiving binary signals from alarms, level switches, and safety interlocks.

• Power Generation: Used in turbine control systems, boiler protection, and distributed I/O subsystems.

• Water Treatment: Monitoring digital inputs from pump controls, gate valves, and flow switches.

• Steel and Metallurgy: Capturing digital inputs for interlock and safety control in rolling mills and furnaces.

• Pharmaceutical Manufacturing: Interface with limit switches and safety sensors in cleanroom automation.

Product Advantages

• Channel-Level Isolation: Each input is optically isolated, ensuring high signal integrity and electrical safety.

• Safety Integrity Level (SIL3): Certified for use in high-reliability safety instrumented systems (when combined with ProSafe-RS).

• Diagnostics-Friendly: Channel LEDs provide instant feedback on signal status, simplifying maintenance.

• Environmental Robustness: Operates effectively in extended temperature and humidity ranges.

• Compact Form Factor: Space-saving design ideal for dense I/O cabinets and modular systems.

• Long Lifecycle Support: Designed in line with Yokogawa’s strategy for long-term system compatibility and spares availability.

• Redundancy Ready: Fully compatible with redundant system architectures for critical operations.

• Global Certifications: Certified for international deployment in hazardous and regulated industries.

Frequently Asked Questions (FAQ)

1. What kind of signals can the ADV142-S02 receive?

   It receives dry contact or voltage-free digital signals from binary field devices.

2. Is the module suitable for safety applications?

   Yes, it is SIL3 certified when integrated with Yokogawa’s ProSafe-RS system.

3. How many channels does the module support?

   It supports 16 optically isolated digital input channels.

4. Can this module operate in high-temperature environments?

   Yes, it is rated for continuous operation up to +70°C.

5. Does each input channel have signal indication?

   Yes, each channel features a front-panel LED for status indication.

6. What is the response time for input detection?

   Typical signal detection delay is less than 10 milliseconds.

7. Is this module hot-swappable?

   No, it should be replaced while the system is powered down, unless the system architecture allows redundancy.

8. Does it require shielding or grounding for noisy environments?

   While the inputs are optically isolated, proper field wiring practices are still recommended.

9. What is the recommended power supply voltage?

   The input side operates at a nominal 24 VDC, supplied by the field.

10. Is the module compatible with other Yokogawa systems?

    Yes, it is compatible with CENTUM VP, ProSafe-RS, and related control systems.