SST SST-PFB3-VME-2 / SST-PB3-VME-1 — PROFIBUS Network Interface Card | VMEbus Platform
Engineering Background
The SST-PFB3-VME-2 (and its predecessor SST-PB3-VME-1) is a high-performance PROFIBUS DP/FMS network interface card designed for VMEbus-based control architectures. Developed under the SST (Woodhead / Molex) industrial communications portfolio, this card enables deterministic fieldbus communication in mission-critical automation environments where VME backplane integration is mandatory.
Product Positioning
Targeted at process control engineers and system integrators who require a proven, slot-in PROFIBUS master or slave solution within existing VMEbus chassis — eliminating the need for external gateways or protocol converters. Ideal for legacy system upgrades, DCS expansions, and new VME-based SCADA deployments.
Complete Technical Specifications
| Part Numbers | SST-PFB3-VME-2 / SST-PB3-VME-1 |
| Manufacturer | SST (Woodhead / Molex) |
| Form Factor | VMEbus single-slot card (6U) |
| Fieldbus Protocol | PROFIBUS DP / FMS |
| Node Role | Master (Class 1 & 2) / Slave (configurable) |
| PROFIBUS Baud Rate | 9.6 kbps – 12 Mbps (auto-detect) |
| Max Slave Nodes | Up to 125 per segment |
| VMEbus Interface | VME64 / VME32 compatible |
| Bus Width | A24/D16, A32/D32 |
| Connector | DB-9 female (PROFIBUS standard) |
| Onboard Memory | Dual-port RAM for host/fieldbus data exchange |
| Firmware | Field-upgradeable via host interface |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +85 °C |
| Power Consumption | ≤ 5 W (from VME backplane +5 V rail) |
| Weight | 120 g |
| Certifications | CE, UL (per original product listing) |
| RoHS Compliance | Consult datasheet for specific revision |
Proven Application Environments
- DCS (Distributed Control System) expansions requiring VMEbus PROFIBUS master integration
- SCADA systems with VME chassis communicating to field devices (drives, I/O, sensors)
- Legacy PLC/VME migration projects retaining existing backplane infrastructure
- Semiconductor fab equipment and test systems using VMEbus with PROFIBUS peripherals
- Power generation and substation automation with deterministic fieldbus requirements
- Oil & gas process control panels requiring certified fieldbus communication
Engineering Advantages
- Dual-port RAM architecture — zero-wait-state data exchange between VME host CPU and PROFIBUS network, minimising cycle-time jitter
- Auto baud-rate detection — plug into any PROFIBUS segment from 9.6 kbps to 12 Mbps without manual DIP switch configuration
- Master Class 1 & 2 support — supports both cyclic I/O (Class 1) and acyclic parameter/diagnostic access (Class 2) in a single card
- Field-upgradeable firmware — future protocol revisions applied without hardware replacement, protecting capital investment
- Backward compatibility — SST-PB3-VME-1 software drivers are forward-compatible with SST-PFB3-VME-2 hardware, simplifying migration
- Proven Molex/Woodhead lineage — manufactured under the same quality system as the broader SST industrial communications family, with global installed base
System Architecture & Signal Flow
The card occupies a single VMEbus slot and presents a dual-port RAM window to the host CPU. The host application writes I/O data and configuration commands into the shared memory; the onboard PROFIBUS controller autonomously manages token-ring arbitration, cyclic polling of slave nodes, and error recovery — offloading all fieldbus timing from the host processor. Status LEDs on the front panel provide real-time indication of bus activity, error states, and power status. The DB-9 connector interfaces directly to the PROFIBUS cable trunk via standard termination resistors.
Sourcing & Quality Verification
- All units sourced through verified industrial automation distributors and authorised channel partners
- Each card undergoes incoming inspection: visual check, label verification, and functional power-on test
- Serial numbers and firmware revision recorded at intake for full traceability
- Original manufacturer packaging preserved where available; anti-static packaging applied to all shipments
- Counterfeit-risk assessment performed per IPC-1782 guidelines for critical components
Procurement Process
- Step 1 — Confirm compatibility: Verify your VMEbus chassis slot pitch (6U), backplane bus width (A24/D16 or A32/D32), and PROFIBUS segment baud rate
- Step 2 — Request quote: Contact [email protected] or call +0086 198 5928 8691 for volume pricing and lead time
- Step 3 — Place order: Add to cart and complete checkout; HKD pricing shown — multi-currency invoicing available on request
- Step 4 — Shipping: Worldwide express shipping (DHL / FedEx); export documentation and HS code 8473.30 provided
- Step 5 — Technical support: Post-delivery driver installation and configuration support available via email
Technical FAQ
Q: Is the SST-PFB3-VME-2 a drop-in replacement for the SST-PB3-VME-1?
A: Yes. The PFB3 revision uses the same VME footprint and is software-compatible with existing PB3 drivers. A firmware update may be required — consult the SST migration guide.
Q: Can this card operate as a PROFIBUS slave?
A: Yes, the card supports slave mode configuration via the host software API, allowing the VME system to appear as a PROFIBUS slave to an upstream master.
Q: What operating systems are supported by the SST driver?
A: SST provides drivers for VxWorks, LynxOS, and Windows (via VME-to-PCI bridge). Linux support is available through third-party EPICS/RTEMS integrations.
Q: Is the card compatible with PROFIBUS PA (process automation)?
A: No. This card supports PROFIBUS DP/FMS only. PROFIBUS PA requires a DP/PA coupler/link at the segment boundary.
Q: What is the warranty?
A: Konmask provides a 90-day functional warranty on all tested units. Extended warranty and exchange programmes available — contact us for details.
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Contact: [email protected] | +0086 19859288691
