SARM15A | Yokogawa Terminal Board (Mechanical Relay Contact Input)

Product Overview

The SARM15A is a mechanical relay contact input terminal board for the CENTUM VP FIO subsystem. It interfaces dry-contact or voltage signals from field devices to digital input modules such as ADV151 and ADV161.

Key Features

• 32 contact input points
• Mechanical relay isolation
• M4 screw terminals
• Supports single and dual-redundant configurations
• External 24 V DC power supply required

Technical Specifications

• Contact Points: 32
• Terminals: M4 screws
• ON Signal: ≤150 Ω
• OFF Signal: ≥200 kΩ
• External Contact Rating: 24 V DC, 13 mA minimum load
• Internal Power: 24 V DC, max 0.32 A
• Field Power: Dual-line 24 V DC, max 0.3 A per line (per 16 points)
• Insulation Resistance: ≥10 MΩ at 500 V DC
• Withstanding Voltage: 1.5 kV AC (field to case), 500 V AC (power to case)
• Dimensions: 482.6 mm (W) × 132.5 mm (H) (3U)
• Weight: Approx. 2.2 kg
• Ambient: 0 to 50 °C, 10 to 90 %RH

FAQ

• What digital input modules is it compatible with? ADV151 (32-point) and ADV161 (64-point).
• What cables are required? AKB331 (32-point) or AKB337 (64-point).
• Is external power needed? Yes, for both internal circuit and field device supply.

Installation Guide

1. Mount the board in a 19-inch rack (3U height).
2. Connect the signal cable to the ADV digital input module.
3. Wire field contacts to the M4 terminals observing polarity and rating.
4. Connect external 24 V DC power supplies.
5. Power up and verify input status via the system.

Selection Tips

• Select for dry-contact or voltage input applications requiring mechanical relay isolation.
• Confirm 32-point density and redundancy requirements.
• Ensure adequate external 24 V DC power capacity.