SSC50D-S2E21 Yokogawa | Safety Control Station Japan

Yokogawa SSC50D-S2E21 Duplex Safety Control Unit ProSafe-RS Vnet/IP

Product Description

The SSC50D-S2E21 (SSC50D) is a high-performance Duplexed Safety Control Unit designed for the Yokogawa ProSafe-RS Safety Instrumented System (SIS). As the central processing core of a Safety Control Station (SCS), this unit executes safety logic with SIL 3 integrity. The "Duplex" architecture features dual-redundant MIPS R5000 processors and dual-redundant power supplies, ensuring that the safety function remains active even in the event of a single hardware failure.

Configured for high-availability Vnet/IP communication, the SSC50D-S2E21 (SSC50D) provides a deterministic interface for I/O modules and peer-to-peer communication between controllers. This specific configuration includes the CFS1100 Safety Control Function License and is treated with ISA Standard G3 conformal coating for protection against corrosive gases. It is engineered for explosion-proof environments and operates on a 220-240 V AC power source, making it the industry standard for emergency shutdown (ESD) and fire and gas (F&G) systems in offshore and refinery applications.

Detailed Technical Specifications

The hardware parameters for the SSC50D-S2E21 (SSC50D) are defined for safety-critical execution:

• Manufacturer: Yokogawa

• Model Number: SSC50D-S2E21

• Product Type: Duplexed Safety Control Unit (Rack Mountable)

• System Architecture: ProSafe-RS (Vnet/IP)

• Safety Integrity: SIL 3 Certified (IEC 61508)

• Processor: MIPS R5000 Processor (Dual-redundant)

• Memory: 32 MB Main Memory; NVRAM for data; Flash for application programs

• Power Supply: Dual-redundant 220–240 V AC (Suffix: 2)

• Protection Suffixes: Explosion protection (Suffix: E); G3 Conformal Coating (Suffix: S)

• Software License: Integrated CFS1100 Safety Control Function

• Communication Interface: Vnet/IP (Dual-redundant support)

• Operating Temperature: -20 °C to +40 °C (Standard G3 Type)

• Mounting: 19-inch Rack Mountable

• Dimensions: 482.6 × 266 × 88.1 mm

• Net Weight: 8.5 kg

• Shipping Weight: 11 kg