Yokogawa SARM15A Relay Board

Overview

The SARM15A Relay Board is a 32-channel digital input interface module engineered for Yokogawa rack-based control and safety systems. It converts dry-contact or relay-contact signals from field devices into reliable logic inputs for process control, safety monitoring, and machine automation. Designed for industrial environments, this module provides high noise immunity and supports both single and redundant system architectures.

Technical Specifications

Electrical Features

• Input Type: Dry contact, mechanical relay contact

• Number of Channels: 32

• Nominal Input Voltage: 24 V DC

• Input ON Resistance: ≤150 Ω

• Input OFF Resistance: >150 Ω

• Isolation: Channel-to-channel and channel-to-system isolation

• Input Filtering: Built-in noise suppression for high-reliability signal detection

Mechanical & Physical

• Form Factor: Rack-mount relay input board

• Dimensions: 482.6 mm (W) × 132.5 mm (H)

• Weight: 2.2 kg

• Terminal Type: M4 screw terminals

• Mounting: Compatible with Yokogawa I/O base frames

Environmental Ratings

• Operating Temperature: −20 °C to +70 °C

• Humidity: Industrial-grade tolerance

• Shock & Vibration: Built to withstand harsh process-plant conditions

System Compatibility

• Works with Yokogawa CENTUM series, ProSafe‑RS, and other rack-based I/O platforms

• Supports single or redundant architectures

• Suitable for monitoring safety-related contacts (use within certified systems for SIL compliance)

Applications

• Emergency shutdown (ESD) system inputs

• Fire & gas contact monitoring

• Motor or solenoid relay feedback

• Valve limit switch monitoring

• Pushbutton and control panel signal acquisition

• General digital input acquisition in industrial automation

FAQ

Q: Can the SARM15A interface with high-voltage signals?
A: No, the module is designed for 24 V DC dry-contact or relay inputs. Use proper isolators for higher voltages.

Q: Is this module SIL certified?
A: The board itself is non-SIL; it can be used in SIL-rated systems if installed within a certified architecture.

Q: Can it be installed in existing Yokogawa racks?
A: Yes, the SARM15A fits standard Yokogawa I/O base frames and supports both CENTUM and ProSafe‑RS systems.