SCP451-51 S1 Yokogawa Safety Processor Module | Order Online
Manufacturer: Yokogawa
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Part Number: SCP451-51-S1
Condition：New with Original Package
Product Type: Safety System Processor Modules
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Country of Origin: Japan
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Yokogawa SCP451-51 S1 ProSafe-RS Safety Processor Module
The Yokogawa SCP451-51 S1 serves as the primary SCP451 Safety Processor Module utilized to execute real-time safety logic across ProSafe-RS platforms. Mounted inside SSC50S/D or SSC57S/D Safety Control Units, the unit processes application programs to trigger active emergency shutdown (ESD) routines and safety interlocks. Deterministic communication travels over Vnet/IP network channels to coordinate field data across redundant controller configurations. Channel-to-channel galvanic isolation prevents signal degradation across backplane circuits while non-explosion-protected construction ensures stable continuous execution in controlled hardware enclosures.
Suffix Breakdown & Model Matrix
The suffix structure of the SCP451 platform defines physical protection options and internal hardware revisions:
- Base Model (SCP451): Standard ProSafe-RS safety processor module hardware architecture.
- First Suffix (-51): Standard industrial enclosure build designated as non-explosion-proof type.
- Second Suffix (S1): Hardware design revision level and internal firmware baseline release.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SCP451-51 S1 |
| Brand | Yokogawa Electric Corporation |
| Origin | USA |
| Weight | 0.70 kg |
| Dimensions | 160 mm x 60 mm x 210 mm |
| Operating Temp | 0 to 50 deg C |
| Power Consumption | 15 W maximum |
| Series | ProSafe-RS |
| System Type | Safety Instrumented System (SIS) |
| Compatible Controllers | SSC50S/D, SSC57S/D |
| Core Network Protocol | Vnet/IP control bus protocol |
| Safety Architecture | SIL 3 configurable in dual-redundant setups |
Process Control & DCS Instrumentation Features
The SCP451-51 S1 processes continuous safety signals using high-speed Vnet/IP communication channels. Integrated galvanic isolation barriers isolate internal microprocessors from field wiring ground loops and electrical voltage transients. The module continuously calculates cold junction compensation values and monitors 4-20 mA analog trip limits sent from remote safety I/O modules, maintaining microsecond-level synchronization across dual-redundant processor pairs to eliminate single points of failure.
Frequently Asked Questions
Q: What action occurs during a single-module replacement in a dual-redundant SSC50D Safety Control Unit?
A: Technicians can extract a faulted SCP451-51 S1 module while the partner processor maintains continuous safety logic execution. Inserting the replacement module into the live rack initiates automated backplane memory synchronization, restoring redundant redundancy without interrupting field safety loops.
Q: How do installer technicians verify cabinet grounding compliance for the SCP451-51 S1?
A: Installation personnel must connect the rack earth lug directly to the main station ground bar using a dedicated copper strap. Measurement across the ground connection must show a path resistance of less than 1 Ohm to ensure effective shield drain currents and suppress noise on Vnet/IP network lines.
Field Installation Guidelines
Align the SCP451-51 S1 card edges with the guide tracks of the target SSC50S/D or SSC57S/D Safety Control Unit slot. Push the module firmly into the chassis until the rear backplane connectors seat completely, then tighten the upper and lower faceplate retaining screws to a torque of 0.5 Nm. Ensure all Vnet/IP communication cables route through isolated wire ducts, maintaining at least 200 mm of physical distance from high-voltage power lines to prevent high-frequency noise coupling. Connect cabinet earth straps directly to the main protective earth bar with less than 1 Ohm total resistance.