Yokogawa SAV144 ProSafe-RS Safety Analog Input Module

The Yokogawa SAV144, also cataloged as the SAV144 Safety Analog Input Module, operates as a dedicated hardware component for high-integrity signal conversion and diagnostic isolation within ProSafe-RS Safety Instrumented System networks. The module executes precise analog-to-digital processing natively at the hardware tier to convert raw voltage telemetry into synchronized digital registers for safety-critical logic evaluation.

Hardware Specifications

High-Reliability Safety Control (SIS)

• SIL3 Certification and Dual Redundancy Tracking The input card is manufactured to satisfy strict SIL3 safety integrity level requirements when deployed within certified ProSafe-RS node architectures. The module circuitry supports direct parallel binding, allowing two identical units to be configured for dual hardware-tier redundancy to prevent a single component failure from disrupting emergency shutdown (ESD) or fire and gas (F&G) detection paths.
• Galvanic Isolation and Fail-Safe State Execution The analog front-end channels are protected by integrated physical insulation barriers that deliver continuous galvanic isolation between the field-side wiring and the internal safety system logic bus. This high-dielectric split stops transient voltage spikes, field ground loops, and inductive surges from bleeding into the core microprocessors, guaranteeing predictable fail-safe state execution during active plant faults.