ARM55D-000 CENTUM VP Relay Output Board | Yokogawa

Product Overview

The Yokogawa ARM55D-000 serves as a robust 32-point relay interface for high-integrity control systems. This module provides mechanical dry contact outputs using "a" contact (Normally Open) logic, making it essential for switching field devices in both single and dual-redundant configurations. We supply this unit as 100% Brand New and Original, ensuring optimal contact conductivity and mechanical longevity for your Distributed Control System (DCS) infrastructure.

Part Number Breakdown

Technical Specifications

Engineering Advantages

• High-Torque Field Termination: The ARM55D-000 utilizes M4 screw terminals for field device connections. This larger screw size allows for higher tightening torque compared to standard M3 terminals, preventing loose connections in environments subject to industrial vibration.

• Redundancy Ready: This board supports dual-redundant configurations, allowing the control system to maintain operation even if a primary signal path encounters an issue. This architecture eliminates single points of failure in critical interlock or shutdown loops.

• Standardized Rack Integration: The 19-inch rack-mountable design facilitates seamless integration into standard industrial cabinets. The fixed dimensions ensure that the board aligns perfectly with other FA-M3 or CENTUM series hardware, optimizing cable routing and airflow.

• Superior Galvanic Isolation: With an insulation resistance of at least 10 MΩ at 500 V DC, the board provides a high-integrity barrier between the control logic and the field environment. This prevents ground loops and protects sensitive electronics from high-voltage transients present on the field side.

FAQs

• What is the difference between the ARM55D and ARM55C models?

  The ARM55D model specifically features larger M4 terminal screws for field connections, whereas other models may use M3.5 or different connector types. The ARM55D is optimized for heavy-gauge field wiring and high-vibration applications.

• Does this board support Normally Closed (NC) configurations?

  No. The ARM55D-000 utilizes "a" contact logic, which refers to Normally Open (NO) mechanical relays. If your application requires NC logic, you must handle the inversion through the DCS software or use an external interposing relay.

• What are the mounting requirements for this unit?

  The board requires a standard 19-inch rack space. Ensure you provide sufficient clearance for the 18.4 cm depth to allow for wire bend radiuses and proper ventilation within the cabinet.

• Is the 10 MΩ insulation resistance sufficient for high-voltage environments?

  Yes, the 10 MΩ rating at 500 V DC exceeds the requirements for standard industrial digital output modules. It ensures that the board safely isolates low-voltage control signals from 24VDC or 110VAC field circuits.