Product Description

The SCB100-S0 is a specialized diagnostic wiring adapter designed for the Yokogawa Electric Corporation digital input architectures within the CENTUM VP and legacy DCS environments.

Its primary function is open-circuit detection for digital input loops. This prevents field wiring failures from being incorrectly interpreted as valid OFF signals. In safety-critical process plants, this capability is essential for detecting cable breaks, loose terminals, or corrosion-induced wiring failures.

The SCB100-S0 is engineered for harsh industrial atmospheres and complies with ISA G3 environmental corrosion resistance standards, making it suitable for chemical, oil & gas, and wastewater facilities where reactive gases and high humidity are present.

Detailed Technical Specifications

Field Applications

Oil & Gas Production
Used for safety monitoring of valve limit switches and shutdown permissives.

Chemical Processing
Protects critical interlock logic from undetected wiring failures in corrosive atmospheres.

Water & Wastewater Treatment
Ensures reliable status monitoring of pumps, gates, and level switches in high-humidity environments.

The SCB100-S0 is particularly valuable in high-availability safety loops, where distinguishing between intentional contact opening and accidental wiring damage is critical for plant safety.

Frequently Asked Questions

Why is the ISA G3 rating important?
The G3 rating ensures the adapter’s internal conductive components and terminals are protected against corrosion from sulfur compounds, chlorine gases, and high humidity environments, preventing signal degradation over time.

Does the SCB100-S0 require external power?
No. The adapter is a passive device that operates directly within the digital input signal loop, using the existing loop current for diagnostic monitoring.

Can it be used with standard DI modules?
Yes. The SCB100-S0 is designed for seamless integration with Yokogawa digital input modules and standard field termination assemblies.