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
Parameter
Specification
Model
SAV144
Brand
Yokogawa
Series
ProSafe-RS Safety Instrumented System (SIS)
Origin
Japan
Weight
Standard ProSafe-RS safety plug-in module mass
Dimensions
Dedicated modular slot form factor geometry
Operating Temp
-40 to +85 deg C absolute operational limits
Humidity Range
0% to 95% RH non-condensing relative threshold
Input Voltage Range
1 to 5 VDC or 1 to 10 VDC configurable signal bands
Maximum Input Current
20 mA maximum current threshold per loop
Output Voltage
24 VDC nominal integrated loop excitation power
Maximum Output Current
20 mA maximum drive capability per channel
Product Type
Analog Input Modules
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.
