SSC50D-S2121 Yokogawa Duplexed Safety Control Unit

SSC50D-S2121 Yokogawa ProSafe-RS Duplexed Safety Control Unit

SSC50D-S2121 Yokogawa ProSafe-RS Duplexed Safety Control Unit

Availability: 20 left in stock

Yokogawa SSC50D-S2121 ProSafe-RS Safety Control Unit Configured for high-availability dual-redundant processing in ProSafe-RS Safety Instrumented Systems, the Yokogawa SSC50D-S2121 (SSC50D...

SKU: SSC50D-F2121

Manufacturer: Yokogawa
Product No.: SSC50D-F2121
Product Type: Safety Control Units
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 6000g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa SSC50D-S2121 ProSafe-RS Safety Control Unit

Configured for high-availability dual-redundant processing in ProSafe-RS Safety Instrumented Systems, the Yokogawa SSC50D-S2121 (SSC50D Duplexed Safety Control Unit) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

Model / Suffix Code	Specification
SSC50D	Duplexed Safety Control Unit (Rack Mountable Type)
-S	Standard type processor module execution
2	Dual-redundant power supply module capability
1	Single ESB bus interface module configuration
2	ISA Standard G3 conformal coating for harsh environment protection
1	Standard specification for system expansion

Hardware Specifications

Parameter	Specification
Model	SSC50D-S2121
Brand	Yokogawa
Origin	Japan
Weight	6 kg
Dimensions	Standard 19-inch rack chassis
Operating Temp	-10 to +55 deg C
Power Consumption	Dual 24 VDC internal bus distribution
Input Channels	50 digital inputs
Input Voltage	24 VDC +/-10%, 12 VDC +/-10%, 5 VDC +/-10%
Channel Current	10 mA max per channel
Input Impedance	3 k-ohm minimum
Isolation Rating	500 Vrms (input to ground)

4-20 mA HART Loop Protocol & Channel Isolation

The Yokogawa SSC50D-S2121 processes sensor data and safety logic execution across isolated 4-20 mA HART loop channels and discrete field inputs. Internal 500 Vrms isolation networks separate the main processor backplane from external ground loops and voltage spikes. Integrated safety communication controllers handle real-time diagnostics over the ESB bus, allowing dual-redundant processor modules to mirror state vectors continuously while maintaining galvanic separation across process variable measurement channels.

Frequently Asked Questions

Q: How does the duplex architecture maintain continuous safety logic execution during a processor fault?

A: Dual redundant CPU modules run identical safety control applications in lockstep; if a hardware fault occurs on the primary CPU, control transfers seamlessly to the secondary CPU without dropping output signals.

Q: What insulation isolation level exists between the field digital input channels and system ground?

A: The digital input circuitry provides a galvanically isolated barrier rated up to 500 Vrms between the input terminals and chassis ground.

Q: Can an auxiliary power module be replaced without de-energizing the main safety unit?

A: Yes, the unit supports live maintenance, allowing technicians to hot-swap a faulty power supply module while the redundant power module carries the system load.

Field Installation Guidelines

Engineers must follow standard industrial safety rack-mounting practices during installation:

Mount the chassis into a standard 19-inch enclosure using four M5 screws and install grounding isolation washers to prevent chassis ground loop currents.
Route high-voltage power lines away from low-voltage DC signals and ESB communication cables to prevent electromagnetic coupling.
Torque all power supply and ground wire terminal connections to manufacturer specifications before energizing the 24 VDC bus feeds.
Confirm proper seating and locking lever engagement for both duplex processor modules prior to system startup.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.