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Product Introduction
The Yokogawa ANS20 Node Interface Unit is an essential component of the ProSafe-RS safety instrumented system, functioning as a critical interface between subsystems and the main safety control units. It is specifically designed to manage redundant communication and ensure robust data transfer over the safety control network, contributing to safe, efficient, and fail-proof plant operation.
As part of Yokogawa’s modular safety platform, the ANS20 provides a reliable communication link between distributed input/output (I/O) nodes and the central controller (AFV10D CPU), enabling high-integrity, SIL-rated communication even under harsh industrial conditions. Its compact design and integration with Yokogawa’s ER Bus (Extension Redundant Bus) allow for simplified installation, scalability, and system diagnostics.
Product Specifications
| Parameter | Specification |
|---|---|
| Model Number | ANS20 |
| Product Type | Node Interface Unit |
| System Platform | Yokogawa ProSafe-RS |
| Communication Bus | ER Bus (Extension Redundant Bus) |
| Redundancy | Supported (Dual path redundancy) |
| Power Supply Voltage | 24 VDC nominal (supplied via baseplate) |
| Power Consumption | Approx. 120–160 mA |
| Input/Output Channels | Acts as gateway for multiple I/O modules |
| Communication Speed | Up to 1 Mbps |
| Mounting Type | DIN Rail Mountable |
| Operating Temperature | 0°C to +55°C (32°F to 131°F) |
| Storage Temperature | -20°C to +70°C (-4°F to 158°F) |
| Humidity Tolerance | 5% to 95% RH, non-condensing |
| Ingress Protection | IP30 (when installed in cabinet) |
| Certifications | SIL3 (IEC 61508), CE, ATEX, FM, CSA |
| Firmware Upgradeable | Yes (via engineering tool) |
| Diagnostics | Built-in diagnostics and status LEDs |
| Dimensions (W × H × D) | 30 × 130 × 100 mm |
| Weight | 0.36 kg |
Product Applications
The ANS20 Node Interface Unit is primarily used in distributed safety control environments, enabling safe communication across multiple I/O nodes. Its robust design and SIL3 certification make it ideal for:
-
Emergency Shutdown Systems (ESD)
Allows for high-integrity safety operations across distributed plant areas. -
Fire & Gas Systems (FGS)
Ensures reliable transmission of alarm and sensor signals to the central controller. -
Burner Management Systems (BMS)
Facilitates safe operation and shutdown of combustion systems. -
Pipeline Safety Systems
Used in oil & gas pipelines to manage safety barriers remotely. -
Offshore Platforms & FPSOs
Designed for safety systems where distributed topology is critical. -
Power Generation Facilities
Ensures safe and synchronized communication for turbine or boiler protection systems.
Product Advantages
-
Redundant Communication Support
Ensures continuous operation through dual ER Bus communication paths. -
Compact & Scalable Design
Small form factor allows for modular and space-efficient system architecture. -
SIL3 Safety Certified
Compliance with IEC 61508 makes it suitable for critical applications. -
Easy Integration
Seamlessly integrates with ProSafe-RS engineering tools and controller systems. -
Built-in Diagnostics
Real-time fault detection and status indication for faster troubleshooting. -
Low Power Operation
Energy-efficient design reduces thermal load in control cabinets. -
Environment-Resistant
Tolerant to industrial conditions with wide temperature and humidity range.
Frequently Asked Questions (FAQ)
-
Q: What system is the ANS20 designed for?
A: It is built specifically for Yokogawa’s ProSafe-RS Safety Instrumented System. -
Q: Does it support redundant communication?
A: Yes, ANS20 supports dual-path ER Bus redundancy for fault-tolerant operations. -
Q: Can the unit be hot-swapped during operation?
A: No, the unit must be powered down for safe replacement or maintenance. -
Q: What is the unit’s safety certification level?
A: It is certified to SIL3 per IEC 61508 standards. -
Q: What diagnostics features are included?
A: LED indicators for fault, status, and communication health; internal self-checking. -
Q: Is the ANS20 suitable for offshore use?
A: Yes, it meets ATEX and marine certifications suitable for offshore installations. -
Q: How is the unit mounted?
A: It is DIN rail mountable for standard industrial enclosures. -
Q: What is the max distance it supports via ER Bus?
A: Each ER Bus segment supports up to 100 meters (depending on cable type). -
Q: Can it interface with multiple I/O modules?
A: Yes, it serves as a communication gateway for several distributed I/O modules. -
Q: How is firmware upgraded?
A: Firmware updates are applied using the system’s engineering tools (e.g., SENG).
Related Models from the Same Series or Application Category
| Model Number | Description | Function |
|---|---|---|
| ANR10D-420 | ER Bus Communication Interface | Redundant Bus Interface |
| AAI141 | 4–20 mA Analog Input Module | Standard Analog Input for SIS |
| AAI143-S50 | Analog Input with SIL certification | Safety-Grade Analog Input |
| AFS10D-420 | Fail-Safe Digital Output Module | Safe Shutdown Output |
| AFV10D | Safety Controller CPU Module | ProSafe-RS Main Controller |
| ANR10S-420 | Standard ER Bus Unit (Non-redundant version) | Single-path Communication Interface |
Popular Yokogawa Models Across Automation Systems
| Model Number | Product Type | Primary Use | System/Series |
|---|---|---|---|
| ADV551-P00 | Communication Module | Ethernet I/O communication | CENTUM VP |
| AAI835-H00 | Analog Output Module | High-density output for control signals | CENTUM VP |
| PW482-10 | Power Supply Module | Redundant power for controllers | CS3000 / CENTUM |
| F3SP71-4S | PLC CPU Unit | Compact PLC controller | FA-M3 Series |
| AMN11D | Node Interface Module | Used in distributed safety systems | ProSafe-RS |
| STARDOM FCN-500 | Remote Automation Controller | Compact control for edge applications | STARDOM |
