ARM55W

Overview

ARM55W is a Yokogawa mechanical relay board providing wet contact outputs for single or dual-redundant configurations.

Contact and Terminals

• Contact Points: 32

• Field Device Terminals: M4 screws

• Modules Supported: ADV551 (32-point DO) + ATD5A terminal block; ADV561 (64-point DO)

Signal Cables

• 32-point: AKB331

• 64-point: AKB337

Load Ratings

• Maximum Load: 250 V AC: 0.6 A per point; 30 V DC: 0.6 A per point; 125 V DC: 0.1 A per point

• Minimum Load: 5 V, 10 mA

Power Supply

• Internal Circuit: 24 V DC, max. 0.65 A

• Field Device Supply: Dual-line per 16 points; 250 V AC / 30 V DC: max 9.6 A; 125 V DC: max 1.6 A

Electrical Safety

• Insulation Resistance: ≥ 10 MΩ (500 V DC)

• Withstanding Voltage:

• Field terminals ↔ Case: 2 kV

• 24 V power terminals ↔ Case: 500 V

• 24 V power terminals ↔ Field terminals: 2 kV

Environmental Conditions

• Operating Temperature: 0–50°C

• Humidity: 10–90% RH

Standards

• Safety: CE, CSA

• EMC: CE, C-Tick, KC

Physical Specifications

• Dimensions: W 482.6 mm × H 132.5 mm × D 177 mm (4U)

• Weight: 2.2 kg

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