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Product Overview
The Yokogawa SCP461-51 S2 is an advanced I/O signal conditioning module designed for use in Yokogawa’s CENTUM control systems and safety instrumented systems (SIS). It plays a crucial role in ensuring accurate transmission and conversion of process signals between field instruments and the control system. Known for its stability, reliability, and compliance with rigorous industrial standards, the SCP461-51 S2 is often deployed in critical applications such as chemical plants, oil & gas facilities, power generation units, and water treatment operations.
This model specifically supports analog input processing, offering enhanced precision and electrical isolation, ensuring safe and uninterrupted communication. The “S2” suffix denotes a safety-certified variant suitable for SIL-rated environments, aligning with IEC 61508 standards.
Technical Specifications
| Parameter | Details |
|---|---|
| Model | SCP461-51 S2 |
| Manufacturer | Yokogawa Electric Corporation |
| Module Type | Analog Input Signal Conditioning Module |
| Input Signal | 4–20 mA DC (standard analog input) |
| Output Signal | Converted digital input for control system use |
| Signal Channels | 1 channel |
| Isolation | Optical isolation between field and system sides |
| Accuracy | ±0.1% of span |
| Operating Voltage | 24 V DC |
| Power Consumption | Approx. 3 W |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 5% to 95% RH (non-condensing) |
| Dimensions | 130 x 32.8 x 107.5mm |
| Weight | 0.36 kg |
| Mounting Type | DIN Rail mounting |
| Certification | SIL2 (IEC 61508), CE, RoHS |
| Communication Protocol | Proprietary (CENTUM DCS integration) |
| Response Time | ≤ 50 ms |
Product Applications
The SCP461-51 S2 is widely used in the following application domains:
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Distributed Control Systems (DCS): For analog signal input conditioning.
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Safety Instrumented Systems (SIS): Certified for SIL2 safety loop applications.
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Petrochemical Plants: For secure analog data collection from hazardous zones.
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Power Plants: Real-time monitoring of turbine, boiler, and auxiliary systems.
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Water and Wastewater Facilities: Signal integrity for process regulation.
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Pharmaceutical Manufacturing: Ensures precise measurement in validated systems.
Product Advantages
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High Signal Accuracy: Delivers ±0.1% accuracy across industrial environments.
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SIL2 Certified: Ensures suitability for use in safety-critical systems.
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Robust Isolation: Built-in optical isolation guarantees signal integrity and system protection.
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Compact Design: Slim 25 mm width enables space-efficient installation.
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Easy Integration: Seamless compatibility with Yokogawa’s CENTUM VP and ProSafe-RS platforms.
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Enhanced Reliability: Designed for continuous operation in high-demand environments.
Installation Instructions
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Ensure Power Isolated: Before installation, disconnect all power to the panel.
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DIN Rail Mounting: Securely mount the module to a standard DIN rail inside the control cabinet.
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Wiring the Input Signal: Connect the 4–20 mA analog signal from the field instrument to the designated terminal.
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Connect System Side: Interface the output terminals to the CENTUM or ProSafe-RS input module.
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Grounding: Use the grounding terminal to minimize electrical noise and ensure safety.
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Power Up: Once connections are confirmed, power the system and verify correct operation via diagnostics.
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Loop Testing: Perform loop integrity tests to confirm signal response.
Frequently Asked Questions (FAQs)
Q1: What type of signals does the SCP461-51 S2 accept?
A1: It accepts standard 4–20 mA DC analog signals from field instruments.
Q2: Is this module suitable for use in safety applications?
A2: Yes, it is SIL2 certified under IEC 61508 and suitable for use in safety loops.
Q3: Can I use this module with non-Yokogawa systems?
A3: While optimized for Yokogawa DCS/SIS, integration with other systems is technically possible but not recommended due to protocol differences.
Q4: What is the response time of this module?
A4: The response time is typically less than or equal to 50 milliseconds.
Q5: Is there electrical isolation between the input and output?
A5: Yes, the SCP461-51 S2 features full optical isolation.
Q6: Can it operate in outdoor environments?
A6: It should be installed within a protected enclosure. Direct outdoor exposure is not recommended.
Q7: What are the power requirements for this module?
A7: It operates at 24 VDC and consumes approximately 3 W.
Q8: Is calibration required for this module?
A8: Factory calibration is provided, but periodic validation is advised depending on application.
Q9: How many channels does this module support?
A9: This model supports 1 input channel.
Q10: Does it support redundant operation?
A10: Redundancy support depends on the system configuration, not the module itself.
Related or Similar Models (Same Series/Function)
| Model | Description |
|---|---|
| SCP461-52 S2 | Dual-channel analog input conditioning module |
| SCP401-51 | Standard analog input signal conditioner |
| SCP451-51 | Signal converter with configurable scaling |
| SCP461-51 | Base version without S2 (non-SIL certified) |
| SCP461-53 S2 | Analog input with enhanced diagnostics |
| SCP460-51 | Compatible module for legacy DCS systems |
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