产品介绍
The Yokogawa NFAI841-S50 Analog I/O Module is a high-performance, safety-rated analog input/output module designed for use within Yokogawa’s ProSafe-RS safety instrumented system (SIS). Engineered to comply with SIL3 standards under IEC 61508, this module supports analog signal monitoring and control in mission-critical applications such as oil & gas, chemical, power generation, and other industrial process systems.
The NFAI841-S50 features 8 isolated analog input channels and 4 analog output channels, with support for HART communication, ensuring smart signal processing and device diagnostics. Its rugged design and advanced fault detection capability provide maximum safety, reliability, and ease / integration into Field Control Station (FCS) environments.
This module enables real-time data acquisition, analog signal control, and secure transmission, making it ideal for systems that require high integrity and performance in both input and output operations.
产品规格
| Specification | Details |
|---|---|
| 型号 | NFAI841-S50 |
| Product Type | Analog I/O Module |
| Input Channels | 8 channels (Analog Input) |
| Output Channels | 4 channels (Analog Output) |
| Input Signal Types | 4–20 mA, 1–5 V, 0–10 V |
| Output Signal Range | 4–20 mA or 1–5 V |
| HART Communication | 支持ed (HART 5 / 7 compatible) |
| Resolution | 16-bit A/D and D/A conversion |
| Isolation | Channel-to-channel and channel-to-ground isolation |
| Power Supply | Supplied via baseplate (typically 24 V DC) |
| Power Consumption | Approx. 4.5 W |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Humidity Range | 5% to 95% RH, non-condensing |
| Certifications | SIL3 (IEC 61508), CE, CSA, FM, ATEX, RoHS |
| Mounting Method | DIN rail or panel via system baseplate |
| Dimensions (W × H × D) | 130 × 27.5 × 90 mm |
| 重量 | 0.25 kg |
Product Applications
The Yokogawa NFAI841-S50 is highly suited for applications requiring a blend / input monitoring and output control in harsh and safety-critical environments:
-
Oil & Gas Platforms
Used in upstream wellhead control and downstream refining operations to monitor and regulate flow, pressure, and temperature signals. -
Chemical and Petrochemical Plants
Ensures safe chemical reactions by precisely controlling and monitoring analog signals in reactors and batch processes. -
Power Plants (Nuclear, Thermal, Hydro)
Integrated into turbine control and boiler management systems requiring high-reliability analog data transmission. -
Water and Wastewater Treatment
Manages chemical dosing, flow monitoring, and feedback-based control in municipal and industrial treatment systems. -
Pharmaceutical Industry
Enables real-time analog feedback loops for temperature, pH, and pressure control under regulated GxP conditions. -
Food & Beverage Automation
Helps maintain consistent product quality by managing analog-controlled devices in mixing, heating, and filling stations.
Product Advantages
-
Dual Analog Capabilities (Input + Output)
Reduces hardware footprint by combining I/O functions into a single safety-rated module. -
SIL3 Certified for Safety
Complies with IEC 61508 to meet the most demanding process safety requirements. -
Integrated HART Communication
Allows for remote calibration, diagnostics, and enhanced device configuration. -
High Signal Accuracy
16-bit resolution on both A/D and D/A converters ensures accurate signal processing. -
Robust Channel Isolation
Each channel is independently isolated, minimizing crosstalk and improving system stability. -
Compact and Modular
Slim design helps reduce panel space while /fering modular expansion capability. -
Diagnostic and Fault Detection
Includes built-in features for loop monitoring, wire-break detection, and output feedback verification. -
Broad Environmental Tolerance
Operates in extreme industrial conditions without performance degradation.
常见问题 (FAQ)
-
What functions does the NFAI841-S50 support?
It provides 8 analog input channels and 4 analog output channels in one module. -
Is this module suitable for use in SIL3 applications?
Yes, it is certified to SIL3 under IEC 61508. -
What types / analog signals are compatible?
It supports standard 4–20 mA, 1–5 V, and 0–10 V signals for both input and output. -
Does this module support HART communication?
Yes, it supports both HART 5 and HART 7 for smart device integration. -
Can the module be mounted on a DIN rail?
Yes, it is designed for DIN rail or panel mounting via the baseplate system. -
Is each channel isolated?
Yes, channel-to-channel and channel-to-ground isolation is provided for both input and output. -
What control platforms is this module compatible with?
It is compatible with Yokogawa ProSafe-RS and CENTUM VP systems. -
What is the resolution / the A/D and D/A converters?
Both converters operate at a 16-bit resolution for precision. -
Does the module provide diagnostics or fault detection?
Yes, it includes loop integrity checks, wire break detection, and output loop monitoring. -
Can this module function in outdoor or extreme environments?
Yes, it supports operation from -20°C to +70°C and high humidity conditions.
Recommended Related or Series 型号s
| 型号 | 描述 |
|---|---|
| NFAI143-S50 | 16-channel analog input module with HART support and SIL3 compliance. |
| NFAI841-S00 | Base version / the NFAI841 without advanced diagnostics. |
| NFAR141-S50 | High-integrity analog input module designed for redundant input paths. |
| NFAI545-S50 | Compact analog input module for distributed systems. |
| NFAO141-S50 | Analog output module with 8 isolated current output channels. |
| NFAI143-H50 | Advanced version with enhanced HART integration and field diagnostics. |
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