Technical Overview

The ARM55C is a high-density relay terminal board within the Yokogawa FAST/TOOLS and I/O interface family. Designed for integration with CENTUM VP and CENTUM CS 3000 systems, it provides a reliable interface for controlling high-power field devices using low-level control signals.

With 32 independent dry contact outputs, the ARM55C electrically isolates control electronics from field-side noise and surge conditions, ensuring stable operation in demanding process automation environments.

Detailed Specifications

Application

• Solenoid valve control

• Motor starters and contactors (via interposing relays)

• Alarm annunciators

• Any application requiring dry-contact isolation between control logic and field devices

Functional & Maintenance Characteristics

• Supports hot-swapping for maintenance without process interruption

• Built-in diagnostics assist in early fault detection

• 19-inch rack–compatible for standard industrial cabinets

• Designed for long relay life and high switching reliability

Technical FAQ

What types of loads can the ARM55C control?
The dry contact outputs are suitable for solenoid valves, motor starters, annunciators, and interposing relays, where galvanic isolation is required.

Does the ARM55C support redundant power supplies?
Yes. The board is compatible with dual-redundant power configurations to maintain output availability during a single power source failure.

How does the ARM55C manage high wiring density?
The use of M3.5 screw terminals provides secure wiring while accommodating high channel density and resisting vibration common in industrial environments.