Configured for discrete telemetry tracking and sequence monitoring within CENTUM CS and CENTUM VP Distributed Control System (DCS) architectures, the Yokogawa SAV144-S63 (SAV144-S63 Digital Input Module) provides direct physical/electrical execution. The module serves as a 16-channel isolated sensing array utilized to capture no-voltage contact inputs from field switches, status interlocks, and critical process alarms.
Hardware Specifications
Parameter
Specification
Model
SAV144-S63
Brand
Yokogawa
Product Type
Digital Input Module (16 Isolated Channels)
System Platform
CENTUM CS / CENTUM VP Control Systems
Origin
Japan (JP)
Weight
Approx. 0.41 kg (0.90 lbs)
Dimensions
2.5 cm x 12.7 cm x 12.7 cm
Operating Temp
-20 to +70 deg C (-4 to +158 deg F) / ISA Standard G3 compliant
Signal Type
No-voltage contact (Dry contact sensing)
ON / OFF Resistance
ON State: <= 1 kOhm / OFF State: >= 100 kOhm
Input Current
6 mA (+/- 20%) at external 24 VDC supply loop
Maximum Input Voltage
30 VDC instantaneous limit
Response Time
<= 40 ms input signal processing latency
Withstand Voltage
2 kV AC for 1 minute (Input-to-system boundary)
Current Consumption
290 mA max (5 VDC internal bus), 140 mA max (24 VDC internal bus)
External Interfaces
Pressure clamp terminal block, MIL cable, or AKB331 signal cable
Yokogawa Process Control and DCS Optimization
4-20 mA HART Loop and Signal Isolation Coexistence: While parsing discrete states, the SAV144-S63 shares backplane power lines with analog field loops. It features 2 kV AC galvanic and optical isolation blocks between input loops and internal logic buses, ensuring that adjacent high-frequency HART communications or analog telemetry streams remain unaffected by common-mode noise or transient field faults.
Channel-to-Channel Isolation Control: The 16 isolated channels use independent sensing loops driven by an external 24 VDC interrogation supply. Electrical boundaries between input sectors prevent localized ground loop currents from feeding back through the backplane, preserving signal integrity across the primary node controller.
