Technical Overview

The ADV851 is a high-efficiency dual-function digital I/O module for the Yokogawa ST7-compatible FIO series, providing 16 digital inputs and 16 digital outputs in a single slot. This hybrid design allows for consolidated local control, reducing total module count and simplifying wiring in compact cabinets.

Fully compatible with CENTUM VP and CENTUM CS systems, the ADV851 supports dual-redundant configurations with hot-swap capability, ensuring reliable operation in mission-critical automation environments.

Technical Specifications

Key Features

• Hybrid Versatility: Combines inputs and outputs in a single module for local control of small equipment skids, valves, and dampers.

• Redundant Resilience: Maintains process control during module replacement in redundant setups.

• Compact Footprint: Slim module design maximizes I/O density in space-constrained cabinets.

• Industrial Durability: EMI-resistant and designed for harsh industrial environments.

Industrial Applications

• Valve Actuation: Reads limit switch status (input) while driving solenoid valves (output).

• Motor Starter Interface: Monitors motor "Run/Fault" feedback while sending "Start/Stop" commands.

• Skid Integration: Controls auxiliary skids such as chemical dosing or air compression units.

Technical FAQ

Does the ADV851 support hot-swapping?

• Yes. In dual-redundant setups, it can be replaced without interrupting the process or affecting the redundant partner module.

What is the benefit of the ST7-compatible FIO design?

• Ensures seamless integration with legacy ST7 systems, allowing the module to serve as a drop-in replacement or expansion unit.

Is external power required for outputs?

• Yes. While the module handles logic and transistor switching, the field-side loads (solenoids, relays, valves) require a separate 24 V DC supply to provide sufficient current.