Yokogawa ARM55T Mechanical Relay Terminal Board

Overview

The Yokogawa ARM55T is a high-reliability mechanical relay terminal board. It interfaces digital output modules with field devices, converting electronic signals into mechanical relay contacts. The board ensures galvanic isolation, signal amplification, and fail-safe switching. It supports demanding industrial automation environments and suits both single and dual-redundant system configurations. Each channel features an AUTO/OFF/ON switch for flexible control.

Technical Specifications

• Model: ARM55T

• Type: Mechanical Relay Terminal Board

• Number of Contact Points: 32 points

• Relay Type: Mechanical Wet Contact

• Contact Configuration: SPST (Normally Open or Normally Closed)

• Rated Input Voltage: 24 V DC

• Rated Input Current: Approx. 0.65–0.85 A

• Rated Output Voltage:

• 250 V AC, max 9.6 A

• 30 V DC, max 9.6 A

• 125 V DC, max 1.6 A

• Maximum Load: 30 V DC, 1.5 A per point

• Minimum Load: 5 V, 10 mA

• Isolation Voltage:

• Field terminals to case: 2 kV AC

• Power terminals to case: 500 V AC

• Power terminals to field terminals: 2 kV AC

• Insulation Resistance: ≥10 MΩ at 500 V DC

• Internal Power Supply: 24 V DC

• Redundancy: Supports single and dual-redundant configurations

• Switch: AUTO/OFF/ON per channel

• Terminal Type: M4 screw terminals for field connections

• Operating Temperature: 0 to 50°C

• Humidity Range: 10% to 90% RH, non-condensing

• Mounting: 19-inch rack mount, 3U height

• Weight: 2.2 kg