Description
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | SST-PFB3-VME-2 |
| Manufacturer | SST Technologies / Molex |
| Product Type | PROFIBUS DP VME Interface Card |
| Bus Interface | VMEbus |
| VME Data Width | 16-bit (D16) |
| Address Modes | A24 / A16 |
| PROFIBUS Interface | Dual-channel PROFIBUS DP |
| Communication Protocol | PROFIBUS DP, FDL Layer 2 |
| Network Ports | 2 independent PROFIBUS channels |
| Transmission Speed | Up to 12 Mbps (depending on configuration) |
| Node Address | Configurable |
| Connector Type | DB9 PROFIBUS connector |
| Firmware | Downloadable application firmware modules |
| Power Supply | 5 VDC from VME backplane |
| Typical Current Consumption | Approx. 1.4 A (dual channel version) |
| Mounting | Standard VME rack |
| Module Size | 6U VME form factor |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 5–95% non-condensing |
| Protection Rating | IP20 |
Product Introduction
SST-PFB3-VME-2 Product Introduction
SST-PFB3-VME-2 is a PROFIBUS communication interface card designed for VMEbus-based industrial control systems. It provides a communication bridge between VME computers and PROFIBUS DP networks, allowing legacy control platforms to exchange real-time process data with distributed field devices, PLC systems, and automation equipment.
The SST-PFB3-VME-2 uses a modular firmware architecture where application functions are loaded into the communication processor. This allows the same hardware platform to support different PROFIBUS communication requirements, including master and slave operation depending on the installed firmware and configuration.
The SST-PFB3-VME-2 is typically found in industrial computers, test systems, motion control platforms, and specialized automation equipment where VMEbus technology remains in service. Replacement requires more than matching the hardware part number; engineers should confirm the firmware version, PROFIBUS configuration database, and host software driver compatibility.
SST-PFB3-VME-2
Application Scenarios & Field Pitfalls (The Engineer’s Perspective)
Engineering Pain Point
A VME-based automation controller continues running, but communication with remote PROFIBUS devices becomes unstable. The field devices are healthy, and the PLC network appears normal, but the VME system cannot exchange reliable process data.
Communication interface cards are often considered simple network adapters. In older control systems, they are part of the application architecture. Firmware, host driver software, and fieldbus configuration all affect system operation.
Typical Applications
Industrial Automation
Used in VME-based machine controllers requiring PROFIBUS connectivity to remote I/O, drives, sensors, and auxiliary controllers.
Process Control Systems
Applied in legacy process monitoring and control platforms where VME computers communicate with distributed field equipment.
Test and Measurement Systems
Used in automated test benches requiring deterministic communication with PROFIBUS instruments and control devices.
Power and Energy Systems
Found in specialized control systems where long-life VME platforms remain installed for equipment operation.
Technical Pitfalls to Avoid
1. Verify Firmware Compatibility
The SST-PFB3-VME-2 hardware behavior depends on the installed firmware module. A replacement card without the correct firmware image may not communicate with the existing application.
2. Confirm PROFIBUS Configuration
Check:
- Master/slave role
- Baud rate
- Station addresses
- GSD configuration files
- Network termination settings
Incorrect PROFIBUS parameters can appear as hardware failure.
3. Check VME System Compatibility
Verify:
- VME CPU board compatibility
- Address mapping
- Interrupt settings
- Driver software support
A physically compatible VME card may still fail if the host application expects different memory or interrupt behavior.
4. Inspect Fieldbus Wiring
Many PROFIBUS communication faults are caused by:
- Incorrect cable shielding
- Missing termination resistors
- Poor connector contact
- Ground potential differences
Related Products
- Single-channel version of the SST PROFIBUS VME interface family. Suitable for applications requiring one independent PROFIBUS network connection.
- SST-PB3-VME-2
Related PROFIBUS VME interface card family with similar communication functions. Used for connecting VME systems to PROFIBUS networks. - Extended version of the VME PROFIBUS interface family with revised hardware/software features.
- SST-PB3-CNF Configuration Software
Engineering utility used for configuring SST PROFIBUS interface cards and network parameters. - VMIVME-7750
VME industrial computer board often used in automation and data acquisition systems requiring communication interface expansion. - VMIVME-7698
VME single-board computer platform commonly paired with communication interface modules. - SST-PB3-CLX-RLL
PROFIBUS communication module designed for Rockwell ControlLogix environments. - Molex SST PROFIBUS Interface Family
Communication products supporting integration between industrial controllers and PROFIBUS field networks.
