产品介绍
The Yokogawa NFAI135 Analog Input Module is a high-performance analog signal acquisition 件 designed for integration with ProSafe-RS Safety Instrumented Systems (SIS). It plays a crucial role in gathering and converting field analog signals into digital form for monitoring and control purposes in safety-critical applications.
This module supports multiple channels and is engineered to deliver high accuracy, noise imm件y, and fault tolerance, making it suitable for demanding industrial environments such as oil & gas refineries, petrochemical complexes, and power stations. It meets stringent safety and reliability standards (including SIL compliance), enabling it to be used confidently in safety layers / plant automation architecture.
Designed to interface seamlessly with the SCS (Safety Control Station) in Yokogawa’s ProSafe-RS platform, the NFAI135 /fers redundant connection support, diagnostic capabilities, and easy field termination, making it a cornerstone in the design / safety-integrated process control systems.
Technical Specifications
| Parameter | Details |
|---|---|
| 型号 | NFAI135 |
| Function | Analog Input Module for Safety Systems (SIS) |
| System Compatibility | Yokogawa ProSafe-RS |
| Number / Channels | 16 analog input channels |
| Input Signal Type | 4–20 mA DC (standard), other ranges configurable |
| Input Type | Single-ended or differential |
| Input Impedance | ≥250 Ω |
| Resolution | 16-bit A/D conversion |
| Accuracy | ±0.1% / span |
| Sampling Rate | 100 ms (typical) |
| Isolation | Channel-to-bus and channel-to-channel isolation |
| Self-Diagnostics | Open circuit detection, out-/-range detection |
| Redundancy 支持 | Yes (with SCS redundancy configuration) |
| Operating Temperature | 0 to 55°C |
| Storage Temperature | -20 to 70°C |
| Humidity Range | 5% to 95% RH (non-condensing) |
| Mounting Method | Mounted on SCS base 件 |
| Material | Flame-retardant engineering plastic |
| Power Supply | Supplied via backplane from SCS |
| Dimensions (W × H × D) | 130 x 107.5 x 32.8 mm |
| 重量 | 0.3 kg |
| Certifications | CE, ATEX, SIL3, RoHS, CSA, UL |
Applications
The NFAI135 Analog Input Module is specifically designed for safety applications where reliable signal acquisition and system diagnostics are critical. It is widely adopted in:
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Oil & Gas Refining – For pressure, temperature, and flow monitoring in hazardous areas.
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Petrochemical Plants – Collects analog data from safety valves, emergency shutdown sensors, and process analyzers.
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Power Generation – Gathers analog input from turbines, boilers, and auxiliary safety systems.
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Pharmaceutical Industry – Ensures critical temperature and pressure inputs are safely acquired in GxP environments.
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LNG and Chemical Storage – Used in SIS architectures to monitor tank levels and leak detection systems.
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Offshore Platforms – Ideal for high-integrity safety system input acquisition in extreme conditions.
Product Advantages
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Certified for Safety: Fully compliant with SIL3 (IEC 61508), suitable for the most demanding safety functions.
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High Accuracy and Stability: 16-bit resolution with low drift ensures precision over long operational periods.
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Full Diagnostics: Built-in open-loop and range-check diagnostics allow proactive fault identification.
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Compact Design: Slim module width enables dense installation within ProSafe-RS racks.
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Redundant Operation: Seamlessly integrates with SCS redundancy configurations for fault-tolerant operation.
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Fast Sampling: Ideal for real-time safety-critical feedback with rapid input scanning.
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Channel Isolation: Each channel is isolated from the others to prevent signal interference or cascading faults.
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Easy Integration: Plug-in module with pre-terminated cables or terminal blocks for reduced wiring time.
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Environmental Durability: Operates under a wide temperature and humidity range.
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Long Lifecycle 支持: Backed by Yokogawa’s industrial support policy for longevity and upgrade pathways.
常见问题 (FAQ)
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What type / signals does the NFAI135 accept?
The NFAI135 is primarily designed for 4–20 mA DC analog signals, which are standard in industrial process instrumentation. -
Is the module suitable for safety-related applications?
Yes, it is SIL3 certified and specifically designed for use in Safety Instrumented Systems (SIS). -
Can the NFAI135 detect faults in field wiring?
Absolutely. It includes diagnostics such as open loop detection and out-/-range input detection. -
Does this module support redundant safety configurations?
Yes, it can be used in dual-redundant SCS architectures to ensure high availability. -
What type / isolation is implemented in the NFAI135?
It provides both channel-to-channel and channel-to-bus isolation for enhanced signal integrity. -
Can the module handle noisy industrial environments?
Yes, with high CMRR (Common Mode Rejection Ratio) and robust shielding, it is built for electrically noisy environments. -
How is the module powered?
It receives power via the ProSafe-RS SCS backplane, eliminating the need for external power wiring. -
How do I connect field wiring to the NFAI135?
Field wiring is typically connected via terminal blocks or pre-wired connectors depending on the rack setup. -
Can this module be hot-swapped?
While physical removal is possible, it is recommended to follow system shutdown procedures to maintain safety compliance. -
Which s/tware is used to configure the NFAI135?
Configuration is done through ProSafe-RS Engineering Tools such as SENG and SCS Configurator within the Yokogawa environment.
Related 型号s (Same Series or Functional 分类)
| 型号 | Function | Channels | Signal Type | System Compatibility |
|---|---|---|---|---|
| NFAI141 | Analog Input Module | 16 | 4–20 mA DC | ProSafe-RS |
| NFAT135 | Thermocouple Input Module | 16 | T/C (Type K, J, etc) | ProSafe-RS |
| NFDV151 | Digital Input Module | 16 | 24 VDC | ProSafe-RS |
| NFDV152 | Digital Output Module | 16 | 24 VDC | ProSafe-RS |
| NFAV161 | Analog Output Module | 8 | 4–20 mA DC | ProSafe-RS |
| NFCP100 | Control Processor 单位 | N/A | CPU Module | ProSafe-RS |
Popular Yokogawa 型号s
| 型号 | Function | System | Key Feature |
|---|---|---|---|
| AAI543 | Analog Input Module | CENTUM CS3000 | Multi-signal support, high precision |
| ADV551 | Fast Analog Input Module | CENTUM VP | High-speed analog data acquisition |
| CP451 | Controller Processor Module | CENTUM VP | Advanced control with redundancy |
| YHC5150X | HART Communicator | Field Devices | Universal field device configuration |
| PW482 | Power Supply Module | ProSafe-RS | Dual-redundant power supply support |
| F3SP76-7S | High-Speed PLC CPU | FA-M3R | Designed for high-performance control |
公司信息
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