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Yokogawa SCP451-51
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DEIF SCM-2 1044220110E
DEIF SCM-2 1044220110E
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Bürkert SE35 00423924
Bürkert SE35 00423924

Yokogawa SCP451-51

Product Introduction:​
The SCP451-51 is the central logic solver (Safety PLC processor) within Yokogawa’s ProSafe-RS SIS. It executes safety application logic, monitors I/O modules, performs self-diagnostics, and communicates with the CENTUM VP DCS via Vnet/IP or ESB bus. Certified for SIL3 (IEC 61508/ IEC 61511) applications.
Category:
Description
Key Features:
  • Dual-redundant hot-standby configuration supported (two SCP451 modules)
  • 32-bit high-speed RISC processor
  • Integrated watchdog, memory parity check, I/O consistency check
  • Online download of modified safety logic (with appropriate password)
  • Event & SOE (Sequence of Events) logging with 1 ms resolution
Technical Specifications:
  • Model:​ SCP451-51 (Standard type, no IS/Ex protection)
  • Function:​ SIS Logic Solver / Processor Module
  • Backplane Supply:​ 5 VDC via rack backplane (typ. 850 mA, ≈4.25 W)
  • Memory:​ Program memory + NV RAM for retain variables; Flash for firmware
  • Scan Time:​ <100 ms typical for typical SIS logic (depends on program size)
  • Communication Ports:​ Vnet/IP (optical fiber), ESB bus to I/O nest; RS-232/485 for engineering PC
  • Supported I/O:​ Up to 1024–2048 I/O points (system dependent)
  • Redundancy:​ Hot-standby pair with automatic switchover
  • Operating Temp.:​ –10 °C to +55 °C (some references –20 °C to +60 °C)
  • Humidity:​ 5–95 % RH non-condensing
  • Vibration:​ 2.5 G, 10–500 Hz
  • Dimensions (H×W×D):​ ≈123 × 122 × 100 mm
  • Weight:​ ≈1.2 kg
  • Certification:​ SIL3 (TÜV), CSA, FM, ATEX/IECEX (when used in certified system), G3 anti-corrosion coating option
Applications:​ Emergency Shutdown (ESD), Fire & Gas (F&G) systems, High-Integrity Pressure Protection (HIPPS), Burner Management (BMS) in oil & gas, refinery, petrochemical, power plants.
Installation Notes:​ Install in designated ProSafe-RS rack slot (typically leftmost). Ensure proper earthing of rack chassis. Never remove/insert module with system live unless hot-swap is confirmed enabled and redundant partner present. Always verify SIL certificate and last firmware compatibility before project download.
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