PLCs, Power Supplies & Others

Precision Switching with Time-Stamping Capability

This board delivers 32 relay outputs with integrated time-stamping for sequence-of-events recording. It captures switching transitions with millisecond precision for critical process analysis. Many facilities rely on this module for fault diagnosis and operational auditing. The unit combines high-density relay outputs with advanced event tracking functionality.

Technical Specifications

Output Channels and Contact Configuration

This module provides 32 form-C relay contacts with both NO and NC terminals. Each relay handles continuous currents up to 5 A at 250 V AC or 30 V DC. The board supports solenoid valves, motor contactors, and annunciator panels. This extensive channel count satisfies demanding I/O requirements in large control systems.

Time-Stamping Functionality and Event Buffer

The unit records each relay transition with a precise 1 ms timestamp. An onboard buffer stores up to 1,024 time-stamped events for later retrieval. This feature enables accurate sequence-of-events analysis after plant upsets. Operators can reconstruct fault sequences using the captured timing data.

Power Consumption and Energy Characteristics

This board draws 18 W when all relays remain energized. Each relay coil consumes 0.75 W from the external 24 V DC source. The unit contains no internal batteries or supercapacitors for time retention. System power provides the necessary reference for all timing functions.

Physical Construction and Mounting Details

The module measures 250 mm in width and weighs approximately 1.35 kg. This solid construction accommodates the dense population of large power relays. Four ribbon cable connectors link the board to external termination assemblies. Installation uses standard Yokogawa backplane guides and retention hardware.

Status Indication and Diagnostic Support

Thirty-two LEDs display the instantaneous state of each output channel. A lit LED indicates the corresponding relay has received an energizing command. This direct visual feedback assists operators during system commissioning. Maintenance personnel can also observe switching activity without external monitoring tools.

Contact Durability and Inrush Performance

These relays offer 20 million mechanical operations under no-load conditions. At rated 5 A loads, the contacts achieve 100,000 reliable switching cycles. The module handles inrush currents of 10 A for up to 20 milliseconds. This robust performance supports motor and inductive load applications effectively.

Regulatory Approvals and Quality Assurance

The ARM55T carries CE, UL, and CSA certifications for international use. These approvals validate compliance with global safety and EMC standards. Each board passes functional testing and timing verification before shipment. This meticulous quality process ensures dependable operation throughout the product life.

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