The VMIVME-5504M is an RS-485 VMEbus Repeater Link Master Board that extends VMEbus communication across distributed chassis architectures over distances up to 1,000 feet (305 meters). Operating as the master element in a repeater link system, it connects up to 16 slave-only VMEbus chassis while maintaining software transparency—no special drivers required. The board supports 8-, 16-, and 32-bit VMEbus data transfers with 16-bit addressing, making it ideal for applications requiring geographically separated I/O control.
Technical Specifications
• Model: VMIVME-5504M
• Manufacturer: Abaco Systems / VMIC
• Form Factor: Double Eurocard with DIN-type I/O connectors
• Communication Protocol: RS-485 differential serial
• VMEbus Data Transfers: 8-bit, 16-bit, 32-bit
• VMEbus Addressing: 16-bit
• Maximum Extension Distance: 1,000 feet (305 meters)
• Slave Chassis Support: Up to 16 per master board
• Common-Mode Noise Rejection: ±7 V
• VMEbus Cycle Delay (10-ft cables): Read 340 ns; Write 380 ns
• Power (Master): +5 VDC @ 2.0 A max; ±12 VDC @ 50 mA max
• Power (Slave): +5 VDC @ 2.1 A max
• MTBF: 243,100 hours (MIL-HDBK-217F)
• Operating Temperature: 0 to 65 °C
• Storage Temperature: -40 to 85 °C
• Operating Altitude: Up to 3,000 m
– Key Features
• Differential line drivers and receivers ensure signal integrity in electrically noisy industrial environments
• Software-transparent operation eliminates custom driver requirements
• Automatic slave chassis reset upon master power loss or link cable disconnection
• Power-on reset provided by slave board during slave chassis startup
• Single pair cable assembly with cable taps simplifies interconnection
– Typical Applications
• Multi-chassis VMEbus systems requiring extended I/O control
• Distributed industrial test and measurement architectures
• Remote data acquisition systems spanning facility distances
– Compatibility & Integration
Operates exclusively with VMIVME-5504 Slave boards. Compatible with standard VMEbus systems supporting the specified data transfer widths and addressing scheme.
