Technical Overview
The Yokogawa SAV144-S33 functions as a high-density analog input module for the CENTUM VP and ProSafe-RS distributed control systems. This module provides 16 isolated channels that accept 1–5 V or 4–20 mA signals from field transmitters and sensors. Its 40 ms data update frequency ensures timely acquisition for process control loops. The SAV144-S33 also supports dual-redundant configurations for mission-critical safety applications.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Yokogawa Electric Corporation |
| Product Type | Analog Input Module |
| System Compatibility | CENTUM VP, ProSafe-RS |
| Input Channels | 16 (module-level isolation) |
| Rated Input Range | 1–5 V or 4–20 mA (software-configurable) |
| Input Impedance | 1 MΩ (voltage) / 250 Ω (current) |
| Accuracy | ±4 mV (voltage) / ±16 µA (current) |
| Temperature Drift | ±4 mV/10°C (voltage) / ±16 µA/10°C (current) |
| Data Update Frequency | 40 ms |
| Withstand Voltage | 1.5 kV AC (input to system) |
| Current Consumption | 300 mA (5 V) / 140 mA (24 V) |
| External Connections | Pressure clamp terminal, MIL cable, KS1 cable |
| Dimensions (W x H x D) | 130 x 124 x 32.8 mm |
| Weight | 0.24–0.29 kg |
| Operating Temperature | -20°C to 70°C |
| Environmental Standard | ISA Standard G3 (conformal coating) |
Input Architecture and Signal Processing
The Yokogawa SAV144-S33 converts analog signals into digital values for the controller’s monitoring and regulatory control tasks. Each channel shares module-level isolation, so a fault on one input will not affect the others. The 1 MΩ input impedance prevents loading on the field transmitter, while the 250 Ω resistor handles current signals. Furthermore, the software-configurable range allows mixing of voltage and current transmitters across channels within the same module.
Environmental Resilience and Suffix Code
The S33 suffix specifies ISA Standard G3 conformal coating, which provides enhanced corrosion resistance for harsh plant environments. The extended temperature range of -20°C to 70°C ensures reliable operation in outdoor cabinets or areas with high ambient heat. Consequently, this module suits applications in chemical plants, oil and gas facilities, and power generation stations.
Integration and Redundancy
The SAV144-S33 seamlessly integrates into Yokogawa CENTUM VP and ProSafe-RS system cabinets via its backplane interface. It supports hot-swapping, enabling module replacement without system shutdown. Furthermore, dual-redundant configurations enhance availability, as the system automatically switches to the backup module upon failure detection.
Details
| Weight | 0.24 kg |
|---|---|
| Dimensions | 130 × 124 × 32.8 mm |
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