Product Introduction
SCP451-11 is a processor module manufactured by Yokogawa for use in industrial automation systems. Its main function is similar to the "brain" of an industrial control system, used to run control programs and safety logic, and is the core computing and decision-making component of the system. It performs logic, makes decisions, and coordinates other modules and devices. It is the core of the automated control system.

Technical Specifications
|
Brand |
YOKOGAWA |
|
Model |
SCP451-11 |
|
PN Number |
SCP451-11 S1 |
|
Description |
ProSafe Processor Module |
|
Origin |
Singapore / Indonesia |
|
Dimension |
23*18*10cm |
|
Weight |
1.25kg |
Product Details
The SCP451-11 processor module is equipped with multiple industrial communication interfaces to enable interconnection with I/O modules, upper-level systems, and field devices: Serial interface: RS-232C, RS-485 (used for point-to-point/bus-type low-speed device communication)
Ethernet or industrial fieldbus: Some versions support 10/100 Mbps Ethernet or higher-speed interfaces
In large-scale refineries or chemical plants, SCP451-11 can be integrated with safety systems to perform emergency shutdown (ESD), leak detection interlocks, and high-temperature protection logic, effectively preventing the spread of accidents.
The system is typically composed of on-site I/O, redundant buses, and multiple SCP451-11 units to form a safety logic network.
The SCP451-11 processor module has a compact size and a lightweight design for easy installation and use. Its durability and reliability allow it to perform well in a variety of industrial applications.
The processor module offers a variety of interface options, including serial and parallel interfaces, as well as digital and analog input/output. It is compatible with a variety of communication protocols and can operate over a wide range of ambient temperatures.
The SCP451-11 module is suitable for many fields such as industrial automation, process control, machine control, energy management, building automation, laboratory equipment, transportation systems, and environmental monitoring.
Technical Specifications:
Processor: MIPS R5000 Processor.
Main Memory Capacity: 32 MB.
Memory Protection: In case of power failure, the application is stored in the flash memory, and the processor module's operation data is stored in the NVRAM (non-volatile memory).
Temperature Adaptability: For the case where the ambient temperature exceeds 40°C, a fan unit is provided.
Communication Interface: Vnet/IP-Upstream Interface: Dual Redundancy ESB Bus Interface: Dual Redundancy.
Communication on Vnet/IP-Upstream: Communication speed 100 Mbps, full-duplex Connection: UTP cable (CAT5e or higher), RJ45 connector, interface compliant with 100BASE-TX standard, maximum distance: 100 meters (between SSC57S/SSC57D and the second layer switch).
Connecting Safety Node Units: Up to nine safety node units can be connected to each safety control unit. When installing, the ESB bus coupler module (SEC401) should be installed on the 7th and 8th slots. The ESB bus can be extended by an optical ESB bus relay module.
Number of I/O Modules: Up to 8 per safety control unit and up to 78 per safety control station (SCS).
Power Requirements: Specify suffix code. Voltage: 100 to 120 V AC, 50 or 60 Hz; Voltage: 220 to 240 V AC, 50 or 60 Hz; Voltage: 24 V DC.
Power Consumption:
SSC57S-S/SSC57D-S 100 to 120 V AC models: 200 VA; 200 to 240 V AC models: 230 VA; 24 V DC models: 5.5 A.
SSC57S-F/SSC57D-F 100 to 120 V AC models: 240 VA; 200 to 240 V AC models: 290 VA; 24 V DC models: 7.0 A.
Comparing SCP451 with SCP461 series
-

SCP451-11 → Focuses on basic security logic processing, suitable for general security control units;
SCP461 → Higher level / higher performance and broader system compatibility processor.The SCP461 series typically offers enhanced signal processing/anti-interference capabilities and larger system capacity support, making it better equipped to handle complex control tasks compared to SCP451.
| SCP451 | SCP461 | |
| Main purpose | Safety control system processor | Advanced Processor for Safety/Control System |
| System compatibility | ProSafe-RS SIS | ProSafe-RS SIS supports a wider range of hardware |
| RFI anti-interference capability | Standard level | There is an "Enhanced RFI" version |
| Redundant support | Dual-redundant bus, SIL3 | Also supports redundancy and is easier to integrate when updating the model. |
| Typical installation environment | Industrial site safety control cabinet | More demanding industrial scenarios |
| Memory / CPU | Medium configuration | Even more advanced or superior |












