The Yokogawa ARM55C is a 32-point mechanical relay board used in the CENTUM VP process control system. It is designed for receiving contact or voltage input signals from field devices and amplifying them for output.

Mechanical Relay Specifications

• Output Type: Dry contact (a or b) – NO (Normally Open) or NC (Normally Closed)
• Configuration Options: Single or dual-redundant systems
• Mounting: M3.5 screws for mounting; M4 screws in the power input section
• Relay Points: 32-point relay configuration

Power and Voltage Specifications

• Input Voltage: 30 VDC, 1.5 A per point
• Auxiliary Power: 24 VDC, 0.85 A max
• Control Voltage: 5 V, 10 mA

Insulation and Safety Standards

• Insulation Resistance: ≥10 MΩ at 500 VDC
• Dielectric Strength:
  • 2 kV between field device terminals and cases
  • 500 V between 24V power terminals and cases
  • 2 kV between 24V power and field device terminals

Environmental and Mechanical Design

• Operating Temperature: 0 to 50°C
• Humidity Range: 10 to 90% RH
• Dimensions: 482.6 mm (W) x 132.5 mm (H), 3U
• Weight: 2.2 kg

Compliance and Certification

• EMC Standards: CE, C-Tick, KC Marking