YOKOGAWA STB4S10 S2 is a high-performance safety input module developed by Yokogawa Electric, specifically designed for the ProSafe-RS safety instrumented system (SIS)—a core solution for critical process industries such as petrochemicals, nuclear power, 

and pharmaceutical manufacturing. Certified to IEC 61508 SIL 3 (the highest safety integrity level for industrial safety systems), this module is engineered to reliably collect and transmit analog or digital input signals from field safety devices (e.g., emergency stop buttons, 

pressure/temperature safety transmitters, flame detectors) to the SIS controller, ensuring timely response to abnormal process conditions.

The module features 4 independent input channels (configurable for different signal types based on application needs), 

each with built-in signal filtering and error-checking functions to suppress electromagnetic interference (EMI) and noise in harsh industrial environments—preventing false alarms or missed fault signals. 

It adopts a redundant hardware design (compatible with ProSafe-RS’s dual-controller architecture) to eliminate single points of failure, ensuring continuous operation even if a partial component malfunctions.

In terms of integration and maintenance, YOKOGAWA STB4S10 S2 supports seamless communication with Yokogawa’s Centum VP distributed control system (DCS) via a dedicated high-speed safety bus, enabling unified monitoring of safety signals and process data. 

It also includes self-diagnostic capabilities (e.g., channel fault detection, power supply monitoring) and status indicator LEDs, 

allowing maintenance personnel to quickly identify and resolve issues without disrupting system operation. With its robust construction and compliance with global safety standards, 

the module provides long-term, reliable support for industrial safety control, minimizing the risk of accidents in high-hazard processes.

中文产品描述

YOKOGAWA STB4S10 S2 是横河电机研发的高性能安全输入模块，专为 ProSafe-RS 安全仪表系统（SIS）设计 —— 该系统广泛应用于石油化工、核电、医药制造等关键流程工业领域。

模块通过 IEC 61508 SIL 3 安全认证（工业安全系统的最高安全完整性等级），核心功能是可靠采集现场安全设备（如紧急停车按钮、压力 / 温度安全变送器、火焰探测器等）的模拟量或数字量输入信号，并将信号精准传输至 SIS 控制器，确保异常工艺工况下系统能及时响应。

该模块配备 4 个独立输入通道（可根据应用需求配置为不同信号类型），每个通道均内置信号滤波与错误校验功能，能有效抑制工业现场的电磁干扰（EMI）与杂波信号，避免误报警或漏检故障信号的风险。

其硬件采用冗余设计（适配 ProSafe-RS 双控制器架构），可消除单点故障隐患，即便部分组件出现故障，仍能保障模块持续运行。

在集成与维护方面，YOKOGAWA STB4S10 S2 通过专用高速安全总线，可与横河 Centum VP 分布式控制系统（DCS）无缝通信，实现安全信号与工艺数据的统一监控；

同时具备自诊断功能（如通道故障检测、电源状态监控）与 LED 状态指示灯，维护人员无需中断系统运行，即可快速定位并排查故障。凭借坚固的结构设计与全球安全标准合规性，该模块为工业安全控制提供长期可靠支撑，显著降低高危工艺场景的事故风险