YOKOGAWA STB4S-00 Pressure Clamp Terminal Block

Product Overview

The YOKOGAWA STB4S-00 is an essential hardware interface component engineered specifically for Yokogawa’s ProSafe-RS safety instrumented system architecture. Designed as a single-configuration pressure clamp terminal block for digital I/O signals, it acts as a secure junction node between field-installed digital devices and compatible I/O modules such as SDV144, SDV531, and SDV541. By ensuring reliable physical wire termination, the STB4S-00 maintains signal integrity and supports stable safety loop operations.

Key Features & Highlights

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

• Digital I/O Optimization: Dedicated single-configuration terminal block tailored for 16-channel or 8-channel digital input and output signal applications.

• Pressure Clamp Security: Utilizes secure pressure clamp termination technology to prevent loose connections caused by operational vibration in industrial plants.

• Environmental Hardening: Manufactured with built-in ISA Standard G3 corrosive gas resistance to withstand harsh industrial atmospheres.

• Compact Footprint: Features space-saving physical dimensions (approx. 32.6 mm width) optimized for dense control cabinet layouts.

• Lightweight Design: Weighs approximately 0.2 kg, minimizing mechanical stress on mounting rails and system backplanes.

Functional Architecture

The STB4S-00 model designation indicates a standard unit without a built-in surge absorber (suffix code -0), making it ideal for standard digital signal routing where external surge protection is separately managed. It mounts easily onto standard DIN rails or structural panels, providing fast installation and maintenance for system integrators and field technicians.

Application

• Oil & Gas Refineries: Emergency shutdown systems (ESD) and fire & gas monitoring control panels.

• Petrochemical & Chemical Plants: High-integrity digital interlock and safety instrumented protection loops.

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

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

Technical Specifications

Item / Feature	Specification Details
Model & Suffix Code	STB4S-00
Module Type	Pressure Clamp Terminal Block for Digital Signals
Configuration	Single configuration (Non-redundant)
System Compatibility	ProSafe-RS Safety Instrumented System
Compatible I/O Modules	SDV144, SDV531, SDV541
Connection Channels	16-channel or 8-channel digital I/O
Surge Absorber Option	Without surge absorber (Suffix -0)
Environmental Protection	Built-in ISA Standard G3 compliance
Dimensions (W x H x D)	Approx. 32.6 mm x 114 mm x 60.5 mm (Without surge absorber)
Weight	Approx. 0.2 kg
Mounting Type	DIN Rail / Panel Mounting

FAQ

Q1: What is the primary application of the YOKOGAWA STB4S-00?

A: The STB4S-00 is designed specifically for digital I/O signals (such as digital inputs and outputs) in single-configuration setups within ProSafe-RS safety systems.

Q2: Does the STB4S-00 include a built-in surge absorber?

A: No, the “-0” suffix code indicates that this specific model is supplied without a built-in surge absorber.

Q3: Which digital I/O modules are compatible with the STB4S-00 terminal block?

A: It is compatible with Yokogawa ProSafe-RS digital I/O modules including SDV144, SDV531, and SDV541.

Q4: Can the STB4S-00 be used for dual-redundant safety loops?

A: No, the STB4S-00 is a single-configuration terminal block. For dual-redundant digital configurations, the STB4D model should be utilized.

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