The Abaco Systems VMIVME-2120-122 is a VMEbus-compatible double Eurocard delivering 64 channels of high-voltage digital output for industrial control and instrumentation systems. Open-collector output drivers source up to 600 mA sink current and support output voltages from 5 VDC to 55 VDC, making this board suitable for relay activation, solenoid control, and incandescent load switching. Eight independently addressable 8-bit registers enable flexible data transfer in 8-, 16-, or 32-bit configurations across jumper-selectable short supervisory or nonprivileged I/O address space. A dedicated Control Status Register (CSR) with independent address mapping optimizes memory efficiency and software control flow.
Technical Specifications
• Channels: 64 digital output channels
• Output Voltage Range: 5 VDC to 55 VDC
• Output Driver Type: Open-collector, 600 mA sink capability
• Data Transfer Modes: 8-, 16-, or 32-bit
• Address Decoder: Separate CSR decoder for hardware control address grouping
• Address Modifier Codes: Jumper-selectable short supervisory or short nonprivileged I/O (factory set to short supervisory)
• I/O Connectors: Dual 64-pin DIN 41612 high-reliability connectors
• Power Consumption: +5 V at 3.786 A maximum
• Operating Temperature: 0 to 55 °C
• Storage Temperature: -20 to +85 °C
• Humidity: 20 to 80 percent relative, noncondensing
• Cooling: Forced air convection
– Key Features
• Built-in-test (BIT) logic supports offline and real-time fault detection
• Test Mode Bit enables offline diagnostics with all outputs OFF
• Fail LED indicates power-up status, extinguished under software control
• Output clamp diodes prevent inductive flyback damage
• Optional automatic surge current shutdown protection
• Optional thermal shutdown protection for incandescent load driving
• Contiguous memory mapping conserves I/O and CSR address space
– Compatibility & Integration
Fully VMEbus specification compatible with standard short supervisory and nonprivileged I/O access modes. Integrates into VMEbus crates with forced-air cooling infrastructure.
