Product Introduction

The ADV157 is a high‑density digital input module designed to interface an industrial control or distributed control system (DCS) with many discrete field‑device signals. Belonging to the Yokogawa field I/O module family, it supports 24 V DC discrete ON/OFF input signals from sensors, switches and contact devices, and delivers them reliably into the control logic.

Typically used in field I/O racks, remote I/O nodes or control cabinets, the ADV157 offers a compact footprint, robust isolation, and compatibility with standard 24 V discrete wiring. The module is intended for installations needing many digital input channels, high reliability and simplified wiring.

Technical Specifications

Applications

• The ADV157 module is used in field I/O racks for DCS systems to capture discrete inputs from field devices such as limit switches, float sensors, proximity contacts, push‑buttons and relay outputs.

• It is ideal for manufacturing automation environments where machine status, operator panel buttons, conveyor run/stop signals or safety interlocks need to be captured and processed by the control system.

• In process industries (such as petrochemical, oil & gas, power generation, water/wastewater treatment) the module enables high‑density discrete input acquisition, reliable signal capture in noisy environments and simplified wiring in tight panel spaces.

• The module also finds use in retrofits or expansions of control systems where many additional input points must be added but space, wiring cost and downtime must be minimized.

• It is applicable in control architectures where standardized 24 V DC discrete inputs are used, requiring modules offering high channel count, robust isolation and compatibility with existing wiring practices.

Advantages

1. High channel density: With 32 discrete inputs in one module, the ADV157 reduces the number of modules needed and helps conserve panel space and wiring cost.

2. Reliable and fast response: With response time of ≤ 8 ms and support for push‑button edge detection (≥ 20 ms ON time, up to ~25 Hz), the module can handle fast digital events and operator inputs.

3. Robust isolation and signal integrity: Isolation ratings of 2 kV AC input ↔ system and 500 V AC among channel commons help maintain signal integrity in electrically noisy and harsh industrial environments.

4. Standard discrete input interface: Accepts 24 V DC ON/OFF signals widely used in industrial automation, making field‑device wiring easier and reducing signal conversion needs.

5. Compact and lightweight: At approx. 0.30 kg and modest dimensions, the module is easy to install, replace or retrofit.

6. Wiring flexibility: Pressure‑clamp terminals and supported cable or connector options simplify field wiring and maintenance.

7. Scalable for different installations: Suitable for new installations or expansions where many discrete inputs are required but wiring cost and space are constrained.

8. Part of a proven modular I/O platform: The module integrates into Yokogawa’s modular field I/O architecture, offering long service life and system compatibility.

Brand & Series

• Brand: Yokogawa

• Series: Digital Input Module Series (within Yokogawa field I/O modules)

• Category: 24 V DC isolated digital input modules, 32‑channel type

• Positioning: The ADV157 sits alongside other modules in the field I/O series designed to handle discrete input signals to distributed control systems. It offers a straightforward, high‑density discrete input capability optimized for 24 V field wiring.

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