Yokogawa SCP451-11CPU Safety Processor Module

Technical Specifications

Model:SCP451-11CPU

Brand:Yokogawa

CPU:32-bit RISC real-time safety processor,Dual MPU comparison safety architecture

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 version 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 SSC50S single SCS or SSC50D dual redundant SCS safety control station,cooperates with SDV series safety I/O modules,interconnects with CENTUM VP DCS through Vnet/IP network,widely used in ESD emergency shutdown,fire & gas detection systems of petrochemical,power,chemical refining plants.

Function

SCP451-11CPU is the core safety CPU processor of SCS safety control station.It adopts dual MPU comparison architecture,two processors execute identical safety calculation and cross-check results to detect transient faults.It executes safety interlock logic,emergency shutdown sequence,alarm management and safety trend data collection.It communicates with HIS operator station,engineering station and safety I/O modules via Vnet/IP safety bus.Two SCP451-11CPU modules can form 1:1 hot redundant configuration,standby processor synchronizes safety data in real-time,realizes bumpless switchover once main CPU fails.Safety logic program can be downloaded,edited and diagnosed via ProSafe-RS engineering software.

Installation

Install on SCS chassis dedicated 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 cross-comparison design,ECC memory error correction,hardware watchdog circuit,continuous hardware self-diagnosis,galvanic isolation on network ports,diagnostic coverage＞99%,strong anti-electromagnetic interference,meets safety critical industrial application requirements.

Feature

SCP451-11CPU belongs to Yokogawa ProSafe-RS SCS safety CPU 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 operator 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

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