SSC50D-S2121 S1 YOKOGAWA Duplexed Safety Control Unit

Availability: 10 left in stock

YOKOGAWA SSC50D-S2121 S1 Duplexed Safety Control Unit The YOKOGAWA SSC50D-S2121 S1, also cataloged as the SSC50D Duplexed Safety Control Unit,...

SKU: SSC50D-S2121 S1

Manufacturer: Yokogawa
Product No.: SSC50D-S2121 S1
Product Type: Safety Control Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 8500g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

YOKOGAWA SSC50D-S2121 S1 Duplexed Safety Control Unit

The YOKOGAWA SSC50D-S2121 S1, also cataloged as the SSC50D Duplexed Safety Control Unit, operates as a dedicated hardware component for high-integrity safety logic execution and subsystem communication within ProSafe-RS Safety Instrumented System (SIS) platforms. Driven by dual-redundant MIPS R5000 processors, the unit processes SIL3-compliant logic solving and executes 2oo3 fail-safe decision algorithms across redundant Vnet/IP network channels.

Suffix Breakdown & Model Matrix

Base Model	Suffix Code	Hardware Configuration
SSC50D	-S	Single / Duplexed Safety Control Unit Base
SSC50D	2	100-120 VAC / 220-240 VAC or 24 VDC Power Supply Selection
SSC50D	121 S1	Revision 1 Hardware Specification for ProSafe-RS Integrated Control Node

Hardware Specifications

Parameter	Specification
Model	SSC50D-S2121 S1
Brand	Yokogawa
Origin	Japan
Weight	8.5 kg
Dimensions	482.6 mm x 88.1 mm x 266 mm
Operating Temp	0 to 55 deg C (fan-assisted >40 deg C)
Power Consumption	100-120 VAC (200 VA), 220-240 VAC (230 VA), or 24 VDC (5.5 A)
Processor	Dual-redundant MIPS R5000
Memory	32 MB Main Memory, Flash Memory, NVRAM
Safety Certification	SIL3 (IEC 61508 / IEC 61511 compliant)
Communication Ports	Dual Vnet/IP, 100BASE-TX (RJ45, CAT5e+), ESB bus interface
Subsystem Input Points	50 digital inputs (24 VDC / 12 VDC / 5 VDC)
Isolation	500 Vrms (input to ground)
Mounting	Standard 19-inch rack mount

High-Reliability Safety Control & Galvanic Isolation

The safety control unit utilizes dual-redundant CPUs operating in parallel with active self-checking diagnostic routines to enforce a fail-safe state during hardware faults. Galvanic isolation up to 500 Vrms between the input signals and the internal processing bus guards against field transients and differential ground potential spikes. The integrated Vnet/IP interface maintains deterministic, low-latency transmission of critical safety trip commands, preventing signal jitter across distributed safety node topologies.

Frequently Asked Questions

Q: Does the module support hot-swapping under active process operation?

A: Yes, both the redundant CPU and power supply modules within the SSC50D control chassis support online hot-swap operations without interrupting safety logic execution or bringing down the ProSafe-RS node.

Q: What network infrastructure is required for the primary control bus?

A: The unit connects via 100BASE-TX full-duplex Ethernet over UTP CAT5e+ cables to Layer 2 switches, maintaining redundant Vnet/IP communications up to a maximum distance of 100 meters per segment.

Q: How many I/O modules and safety node units can a single control unit manage?

A: The SSC50D host supports up to 8 direct-attached I/O modules per control unit chassis and scales up to 9 Safety Node Units (SNUs) for a maximum of 78 I/O modules per Safety Control Station (SCS).

Field Installation Guidelines

Mount the unit in a standard 19-inch instrument rack, ensuring adequate structural support for its 8.5 kg mass. Fasten all four front flange screws securely to the rack frame to guarantee physical stability and continuous chassis earth grounding.

Maintain a minimum clearance of 100 mm above and below the chassis for unimpeded convective airflow, and verify fan assembly operation if ambient enclosure temperatures exceed 40 deg C. Route dual Vnet/IP communication cables through separate wiring channels, keeping a minimum distance of 300 mm from high-voltage AC lines and motor control circuits. Ground all communication shielding at a single point on the main system ground bar to prevent ground loops.

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.