Yokogawa SAI143-H33/PRP – 16-Channel Analog Input Module | CENTUM VP DCS Platform
Engineering Background
The SAI143-H33/PRP is a high-density analog input module engineered for Yokogawa’s CENTUM VP distributed control system. Designed to meet the rigorous demands of continuous process industries, this module delivers reliable 4–20 mA signal acquisition with integrated HART communication and hardware-level redundancy (PRP – Parallel Redundancy Protocol), ensuring zero-interruption data integrity in mission-critical loops.
Product Positioning
Targeted at instrumentation and control engineers responsible for refinery, petrochemical, power generation, and pharmaceutical automation projects, the SAI143-H33/PRP provides a drop-in upgrade path for legacy CENTUM CS 3000 installations while natively supporting CENTUM VP R6 architecture. Its compact form factor and high channel density reduce cabinet footprint without sacrificing signal fidelity.
Complete Technical Specifications
| Part Number / SKU | SAI143-H33/PRP |
| Manufacturer | Yokogawa Electric Corporation |
| Series / Platform | CENTUM VP (also compatible: CENTUM CS 3000) |
| Module Type | Analog Input (AI) |
| Number of Channels | 16 channels |
| Input Signal Range | 4–20 mA DC (with HART superimposed) |
| Input Impedance | 250 Ω (internal burden resistor) |
| Resolution | 16-bit A/D conversion |
| Accuracy | ±0.1% of full scale |
| HART Protocol | HART 5 / HART 7 (per channel, simultaneous) |
| Redundancy | PRP (Parallel Redundancy Protocol, IEC 62439-3) |
| Isolation | Channel-to-channel and channel-to-bus optical isolation |
| Power Consumption | ≤ 5 W (typical) |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -25 °C to +70 °C |
| Humidity | 5% to 95% RH (non-condensing) |
| Weight | 360 g (approx.) |
| Country of Origin | Japan |
| Certifications | CE, UL, cUL, ATEX (zone 2 barrier required) |
| Mounting | Node Unit (NU) backplane slot, CENTUM VP field control unit |
Proven Application Environments
- Oil & Gas: Upstream wellhead monitoring, downstream refinery distillation column control
- Petrochemical: Reactor temperature and pressure loop acquisition in ethylene crackers
- Power Generation: Boiler drum level and steam flow measurement in coal/gas-fired plants
- Pharmaceutical: FDA 21 CFR Part 11-compliant batch process monitoring
- Pulp & Paper: Multi-zone temperature profiling in continuous digesters
- Water Treatment: Flow and pH signal aggregation in municipal SCADA-DCS hybrid architectures
Engineering Advantages
- PRP Redundancy: Dual-network parallel operation eliminates single points of failure; seamless switchover with zero packet loss per IEC 62439-3.
- Per-Channel HART: Simultaneous HART communication on all 16 channels enables live device diagnostics without interrupting primary 4–20 mA control loops.
- High-Density I/O: 16 channels per slot maximizes I/O density in CENTUM VP field control units, reducing hardware cost per loop.
- Optical Isolation: Full channel-to-channel isolation prevents ground loops and protects the controller bus from field-side transients.
- Hot-Swap Capable: Module can be replaced under power without shutting down the field control unit, supporting zero-downtime maintenance.
- Backward Compatibility: Fully interoperable with CENTUM CS 3000 node units, protecting existing infrastructure investments.
System Architecture & Signal Flow
Field transmitters (4–20 mA / HART) connect via marshalling cabinet to the SAI143-H33/PRP terminal block. The module’s 16-bit A/D converter digitizes each channel independently. Digitized values are transmitted over the CENTUM VP V-net/IP control bus to the Field Control Unit (FCU) processor. The PRP sub-module maintains two independent Ethernet paths (LAN-A / LAN-B) to the FCU, with the HSR/PRP coupler providing seamless frame duplication and elimination. HART frames are extracted in-module and forwarded to the HART multiplexer or Yokogawa’s Plant Resource Manager (PRM) for asset management.
Sourcing & Quality Verification
- All units sourced from authorized Yokogawa distributors or verified OEM surplus channels.
- Each module undergoes incoming inspection: visual check, firmware version verification, and functional loop test (4 mA / 12 mA / 20 mA per channel).
- Original Yokogawa serial number and date code retained; no remarking or refurbishment without disclosure.
- Packaging: anti-static bag + foam-lined carton; humidity indicator card included for long-haul shipments.
- Certificate of conformance (CoC) and test report available upon request.
Procurement Process
- Confirm compatibility: Provide your FCU model, CENTUM VP revision, and node unit slot count — our engineers will verify fit.
- Request quote: Contact [email protected] or call +0086 19859288691 for volume pricing and lead time.
- Place order: Purchase directly via this listing or via PO/proforma invoice for corporate procurement.
- Shipping: DHL / FedEx express worldwide; EXW Xiamen or CIF destination available. Typical lead time: 3–7 business days.
- After-sales: 12-month warranty; technical support from Konmask engineering team throughout commissioning.
Technical FAQ
Q: Is the SAI143-H33/PRP compatible with CENTUM CS 3000?
A: Yes. The module is backward-compatible with CENTUM CS 3000 node units. Confirm your FCU firmware revision supports PRP redundancy before installation.
Q: Can HART communication run simultaneously with 4–20 mA control?
A: Yes. HART is superimposed on the 4–20 mA loop; both signals operate concurrently without mutual interference.
Q: What does the /PRP suffix indicate?
A: /PRP denotes the Parallel Redundancy Protocol option, providing dual-path Ethernet redundancy per IEC 62439-3 for high-availability installations.
Q: Is hot-swap supported in a live CENTUM VP system?
A: Yes, provided the FCU is configured for redundant I/O operation. Always follow Yokogawa’s hot-swap procedure in the CENTUM VP engineering guide.
Q: What certifications does this module carry?
A: CE, UL, cUL. ATEX Zone 2 use requires an approved Zener barrier or galvanic isolator in the field wiring circuit.
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