Yokogawa SCP451-11 Safety Processor Module

Technical Specifications

Model:SCP451-11

Brand:Yokogawa

CPU:32-bit RISC real-time safety processor

Memory:64MB ECC RAM,32MB Flash memory

Safety certification:TÜV SIL3 (IEC61508)

Control cycle:5ms ~10s configurable

Max safety I/O points:8192

Communication port:Dual Vnet/IP Ethernet ports,RS232C service port

Redundancy:1:1 hot standby redundant support,bumpless switchover

Power supply:24V DC,20.4~26.4V DC

Max power consumption:20W

Suffix -11:Standard type for ProSafe-RS SCS safety station

Operating temperature:0~+50℃

Relative humidity:5~95% non-condensing

Weight:0.75kg

Certification:CE,UL,TÜV SIL3

System compatibility

Designed for Yokogawa ProSafe-RS safety instrumented system(SIS),installed in SCS safety control station,cooperates with SDV series safety I/O modules,can communicate with CENTUM VP DCS via Vnet/IP network,widely used in ESD emergency shutdown,F&G fire and gas protection of petrochemical,power,chemical refining plants.

Function

SCP451-11 is core safety processor module of SCS safety control station.It executes safety interlock logic,emergency shutdown sequence,alarm management and safety data collection.Dual MPU comparison architecture ensures high diagnostic coverage to detect transient errors.Dual SCP451-11 can form 1:1 hot redundant configuration,standby processor synchronizes safety data real-time,realize bumpless switchover once main CPU fails.It communicates with HIS operator station,engineering station and safety I/O modules via Vnet/IP safety bus.Safety logic can be downloaded and configured via ProSafe-RS engineering software.

Installation

Install on SCS chassis backplane slot,connect Vnet/IP network cable to dual Ethernet ports,configure safety logic and redundancy parameters via ProSafe-RS engineering software.Hot swap supported under redundant configuration.

Interface

‑Dual Vnet/IP RJ45 ethernet ports

‑RS232C service debug port

‑Internal ESB bus backplane connector

‑LED indicators for run,standby,alarm and fault status

Circuit feature

Dual MPU comparison architecture,ECC memory error correction,hardware watchdog,continuous hardware self-diagnosis,galvanic isolation on network ports,high diagnostic coverage>99%,strong anti-electromagnetic interference for safety critical application.

Feature

SCP451-11 belongs to Yokogawa ProSafe-RS SCS safety processor series.Suffix -11 represents standard version.Common faults:backup battery aging,Vnet/IP port damage,memory failure,backplane poor contact.Confirm firmware version before replacement.

Diagnostic

CPU operation error,memory fault,safety communication link loss or module hardware fault triggers alarm and upload diagnostic information to DCS HIS station.

Built‑in function

Safety interlock,emergency shutdown control,alarm processing and safety network communication management for SCS safety control station,used for SIS safety spare replacement.

Product Brief

SCP451-11 is Yokogawa ProSafe-RS SIL3 certified safety processor module,supports 1:1 hot standby bumpless switchover.Check SCS chassis and system firmware compatibility before ordering.ESD anti-static protection required during installation.