Yokogawa ARM55T Mechanical Relay Terminal Board

Overview

The Yokogawa ARM55T is a robust mechanical relay terminal board designed for industrial automation systems. It efficiently interfaces digital output modules with field devices, converting electronic signals into mechanical relay contacts. This board provides essential features like galvanic isolation, signal amplification, and fail-safe switching, ensuring reliable operation in demanding environments. The ARM55T supports both single and dual-redundant configurations, offering flexibility for various control system setups. Additionally, each channel is equipped with an AUTO/OFF/ON switch for precise control, allowing for convenient adjustments in real-time.

Key Features

Galvanic Isolation: The ARM55T ensures complete separation between the field devices and control system, protecting against electrical interference.
Flexible Control: Each channel includes an AUTO/OFF/ON switch, providing users with versatile control options for different industrial processes.
Mechanical Wet Contact Relays: This board utilizes SPST (Normally Open or Normally Closed) relay configuration, making it adaptable to various industrial control needs.
Redundant Configurations: The board supports single or dual-redundant system setups, enhancing reliability and fault tolerance in critical applications.
High Load Capacity: It can handle up to 9.6 A at 250 V AC, 30 V DC, and 125 V DC, ensuring stable operation under heavy loads.
Comprehensive Isolation: The board offers multiple isolation voltages, protecting the system from unexpected surges and spikes.

Technical Specifications

Parameter	Specification
Model Number	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	0.65 A – 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 @ 500 V DC
Internal Power Supply	24 V DC

Applications

The Yokogawa ARM55T excels in industrial applications requiring reliable relay switching and signal conversion, such as:

Process Automation: Perfect for converting digital outputs into mechanical relay contacts for controlling field devices.
Control Systems: Its flexibility makes it ideal for integration into complex control systems with redundancy requirements.
Field Device Control: Used to control and interface with a wide range of field devices, including sensors, actuators, and other industrial equipment.
Heavy Load Environments: Its high load capacity makes it suitable for controlling high-power devices, ensuring stable operations in demanding applications.

Conclusion

In conclusion, the Yokogawa ARM55T is a highly reliable mechanical relay terminal board designed to meet the needs of industrial automation systems. With 32 output points, flexible relay configurations, and comprehensive isolation features, it ensures optimal performance in critical applications. The board is an excellent solution for users requiring high-load capacity and redundancy, making it a trusted choice for industrial control systems.