Yokogawa SSC60D-S2522 ProSafe-RS Safety Control Unit
The Yokogawa SSC60D-S2522, also cataloged as the SSC60D Duplexed Safety Control Unit, operates as a dedicated hardware component for executing emergency shutdown and safety interlock logic within ProSafe-RS control platforms via Vnet/IP network architectures.
Suffix Breakdown & Model Matrix
| Code | Option / Specification | Description |
|---|---|---|
| SSC60D | Base Model | Duplexed Safety Control Unit (for Vnet/IP, Rack Mountable Type) |
| -S | Environmental Coating | Standard Type (-20 to +40 deg C) with ISA Standard G3 conformal coating |
| 2 | Redundancy | Dual-redundant power supply configuration |
| 5 | Explosion Protection | With no explosion protection |
| 2 | Voltage Rating | 220 to 240 VAC power supply voltage |
| 2 | License Configuration | Without Safety Control Function License (R4.01 or later) |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SSC60D-S2522 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 8.5 kg (Net), 11.0 kg (Shipping) |
| Dimensions | Standard rack-mountable 19-inch chassis unit |
| Operating Temp | -20 to +40 deg C |
| Power Consumption | Dual 220 to 240 VAC feeds |
| Network Protocol | Vnet/IP real-time control bus |
| System Platform | ProSafe-RS Safety Instrumented System |
| Safety Integrity Level | Certified SIL3 (IEC 61508) |
| Environmental Protection | ISA Standard G3 conformal coating |
| Redundancy Architecture | Dual-redundant processor modules and dual power supplies |
Process Control and DCS Connectivity
The SSC60D-S2522 processing platform transmits safety interlock status vectors over real-time Vnet/IP control buses while managing local I/O communication over ESB expansion channels. Internal circuitry incorporates dedicated galvanic isolation to eliminate field loop electrical noise and ground potential shifts across high-density marshalling panels. Designed for high availability in SIL3 safety instrumented systems, the dual-redundant architecture runs paired CPU modules in parallel to perform continuous cross-diagnostics and field signal updates without interrupting ongoing safety loops.
Frequently Asked Questions
Q: How does the duplexed CPU architecture handle primary module faults in the SSC60D-S2522?
A: Paired processor modules execute safety logic synchronously, enabling the backup CPU to instantly assume processing operations without delaying deterministic safety execution or dropping Vnet/IP network links.
Q: What environmental protection standard applies to the circuit boards within this unit?
A: The internal printed circuit assemblies feature factory-applied ISA Standard G3 conformal coating to resist atmospheric corrosion caused by airborne contaminants and chemical vapors.
Field Installation Guidelines
Mount the SSC60D-S2522 unit into a standard 19-inch instrument rack inside the control cabinet, tightening front panel rack screws to fix the chassis securely. Connect dual independent 220 to 240 VAC power sources to the respective power terminals, ensuring correct fuse sizing and external breaker isolation. Connect dual Vnet/IP Ethernet cables to the redundant interface ports on the rear backplane until cable connectors lock cleanly into place. Route cabinet ground straps directly to the dedicated earth grounding lug on the main chassis frame to ensure low-resistance shielding against electrical interference.
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