The VMIVME-5532M is a master VMEbus fiber-optic repeater link that extends VMEbus system capabilities across long distances using fiber-optic cables. This board operates as one half of a two-board set (paired with a slave board such as the VMIVME-5532S) to enable communication between separate VMEbus chassis, allowing a master CPU in one chassis to control slave I/O boards in another. The link provides total electrical isolation between connected systems, eliminating EMI and delivering high-voltage isolation in electrically noisy or safety-critical environments.
Technical Specifications
• Link Type: Master VMEbus fiber-optic repeater (requires paired slave board)
• VMEbus Compliance: Specification revision C
• Data Transfer Support: 8-, 16-, and 32-bit transfers
• Address Support: 16-, 24-, and 32-bit addressing
• Address Modifiers: 09, 0D, 29, 2D, 39, 3D
• Fiber Cable Length: Up to 6,560 feet (2,000 meters)
• Fiber Type: Multi-mode, 62.5 micron core, 125 micron clad, 900 micron buffer
• Operating Wavelength: 1,300 nm
• Maximum Attenuation: 9.0 dB at 1,300 nm (including connectors)
• Fiber Bandwidth: 500 MHz-km at 1,300 nm
• Connectors: ST type or 2.5 mm bayonet
• Cable Rating: OFNP (U.L./NEC)
• Read Cycle Overhead: 4.0 µs maximum
• Write Cycle Overhead: 4.0 µs maximum
• Minimum Transfer Rate: 1 Mbyte/s (D32, 10-foot cable, 250 ns slave response)
– Key Features
• Complete electrical isolation between VMEbus chassis eliminates ground loops and cross-coupling noise
• Software-transparent operation achieves direct master-to-slave communication with zero software overhead
• Unidirectional link control with bidirectional data transfers
• Repeated VMEbus signals: D00–D31, A01–A15, SYSRESET*, SYSCLK, DS0*, DS1*, LWORD*, IACK*, AS*, SYSFAIL*, AM0–AM5, BERR*, WRITE*, DTACK*
• Isolated arbitration signals (BR0*–BR3*, BGIN0*–BGIN3*) remain local to each chassis
• System expansion to 19 × 19 slots using 20-slot backplanes in star configuration
• Supports multiple remote computers accessing shared I/O resources
– Typical Applications
• Multi-chassis VMEbus systems requiring galvanic isolation
• High-EMI industrial and power distribution environments
• Systems requiring separation of safety-critical and general I/O domains
• Distributed data acquisition across geographically separated locations
– Compatibility & Integration
Pairs with VMIVME-5532S slave board. Complies with VMEbus specification revision C for standard signal timing and protocol adherence.
