YOKOGAWA SBM54D-00 Relay Board for Digital Output

Product Overview

The YOKOGAWA SBM54D-00 is an advanced DIN rail mount Relay Board engineered specifically for digital output applications within Yokogawa’s ProSafe-RS safety instrumented system architecture. Designed to interface directly with compatible SDV541 digital output modules via dedicated AKB331 signal cables, this board handles 16 channels of dry contact outputs. It plays a critical role in safety-instrumented systems (SIS) and emergency shutdown loops by providing secure and isolated electrical switching for field equipment.

Key Features & Highlights

• ProSafe-RS Safety Integration: Built explicitly for seamless hardware compatibility within Yokogawa ProSafe-RS safety instrumented system architectures.

• 16-Channel Dry Contact Output: Manages 16 channels of reliable dry contact switching for high-integrity digital output signals.

• DIN Rail Mount Design: Features a compact, space-saving DIN rail mountable form factor optimized for clean and organized control cabinet layouts.

• Dual Power Supply Support: Equipped with dual power supply capability and integrated status LED indicators to monitor normal operation and power status.

• SIL2 Compliance: Complies with SIL2 safety integrity levels when utilized in De-energized-To-Safe (DTS) output configurations under low demand modes of operation.

• Secure Pressure Clamp Terminals: Utilizes dependable pressure clamp terminal connections for fast, secure, and vibration-resistant field wiring termination.

Functional Architecture

The SBM54D-00 operates on an external 24 V DC power supply (+20%, -10%) with a current consumption of up to 500 mA. It features robust withstanding voltage protection (2 kV AC between field device terminals and case, and 2.5 kV AC between power and signal terminals) along with high insulation resistance. It also includes a dedicated READY contact terminal to monitor power supply and fuse operating status.

Application Fields

The YOKOGAWA SBM54D-00 digital relay board is widely deployed across critical safety and process control networks in industries such as:

• Oil & Gas Upstream & Downstream: Emergency shutdown systems (ESD), fire & gas interlocks, and offshore platform safety loops.

• Petrochemical & Chemical Plants: High-integrity safety shutdown and automated valve control trip networks.

• Power Generation Facilities: Boiler safety interlocks, turbine protection, and emergency trip systems.

• Water & Wastewater Management: Critical digital alarm switching and automated safety shutdown infrastructure.

Technical Specifications

Item / Feature	Specification Details
Model & Suffix Code	SBM54D-00
Board Type	Relay Board for Digital Output (DIN Rail Mount Type)
Number of Channels	16 channels x 1 (Dry contact outputs)
System Compatibility	ProSafe-RS Safety Instrumented System
Compatible Connection Module	SDV541 (Single and Dual-redundant possible)
External Signal Connection	Dedicated signal cable AKB331
Terminal Type	Pressure clamp terminals
Safety Integrity Level	SIL2 compliant (when used as DTS outputs under low demand mode)
External Supply Voltage	24 V DC (+20%, -10%), up to 500 mA
Rated Output Capacity	30 V DC / 4 A, 240 V AC / 4 A (per channel)
Withstanding Voltage	2 kV AC between field device terminal and case (1 minute)
Insulation Resistance	10 Mega-ohms minimum (500 V DC)
Ambient Temperature	-20°C to +70°C (during operation)
Dimensions & Weight	DIN rail mount profile, Approx. 0.6 kg

FAQ

Q1: What does the SBM54D-00 relay board connect to in a ProSafe-RS system? A: The SBM54D-00 is designed to connect directly with Yokogawa ProSafe-RS SDV541 digital output modules using dedicated AKB331 signal cables.

Q2: Does the SBM54D-00 support dual-redundant configurations? A: Yes, it supports both single and dual-redundant module connection configurations for high-availability safety loops.

Q3: What type of wiring connections does this relay board use? A: It features secure pressure clamp terminals for field device connections, ensuring reliable and vibration-resistant wiring.

Q4: What is the safety rating of the SBM54D-00 board? A: SBM54D-00 complies with SIL2 safety standards when used as De-energized-To-Safe (DTS) outputs under low demand modes of operation.

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