SARM55W | Yokogawa Terminal Board (Wet Contact Output)

Product Overview

The SARM55W is a mechanical relay wet contact output terminal board for the Yokogawa CENTUM VP FIO subsystem. It provides 32 wet contact output points and interfaces digital output modules (ADV551 / ADV561) to field devices that require powered contacts.

Key Features

• 32 wet contact output points
• M4 screw terminals
• Supports single and dual-redundant configurations
• Dual-line field power supply (per 16 points)
• Compatible with AKB331 / AKB337 signal cables

Technical Specifications

• Contact Points: 32
• Contact Type: Wet contact output
• Terminals: M4 screws
• Maximum Load: 250 V AC 0.6 A, 30 V DC 0.6 A, 125 V DC 0.1 A per point
• Minimum Load: 5 V, 10 mA
• Internal Power: 24 V DC, max 0.65 A
• Field Power Supply: Dual-line (per 16 points)
• Compatible Modules: ADV551 (32-point), ADV561 (64-point)
• Dimensions: 482.6 mm (W) × 177 mm (H) (4U)
• Weight: Approx. 2.6 kg
• Ambient Temperature: 0 to 50 °C

FAQ

• What is the main difference from SARM55D? SARM55W provides wet contacts with field power supply; SARM55D is dry contact (NO only).
• Does it support redundancy? Yes, single or dual-redundant configurations are supported.
• What signal cables are used? AKB331 (32-point) or AKB337 (64-point).

Installation Guide

1. Mount the board in a 19-inch rack (note the 4U height).
2. Connect the AKB331 or AKB337 signal cable to the ADV551/ADV561 module.
3. Wire field devices to the M4 terminals.
4. Connect the dual-line field power supplies and internal 24 V DC power.
5. Power up and verify wet contact operation.

Selection Tips

• Select SARM55W when field devices require powered (wet) contacts.
• Confirm the dual-line field power capacity meets your load requirements.
• Check rack height (4U) before installation.