The Abaco Systems / VMIC VMIVME-2128-311 is a 128-bit high-voltage digital output board for VMEbus systems. It delivers open-collector output control across 128 channels with selectable 5 to 48 VDC output levels, 600 mA sink current per channel, and 55 V breakdown voltage rating. Built-in test logic enables software-controlled verification of each channel, while integrated protection circuitry includes automatic surge current shutdown, thermal shutdown, and inductive flyback clamp diodes. The board mounts in a 6U form factor and complies with ANSI/IEEE STD 1014-1987, IEC 821, and IEC 297 VMEbus specifications.
Technical Specifications
• Channels: 128 digital outputs
• Output Type: High-voltage open-collector drivers
• Output Voltage Range: 5 to 48 VDC
• Breakdown Voltage: 55 V
• Current Sink: 600 mA per channel
• Data Access: 8-bit, 16-bit, or 32-bit transfers; addressable as sixteen 8-bit bytes, eight 16-bit words, or four 32-bit longwords
• Data Polarity: Positive true (logic 1 asserts output)
• Operating Temperature: 0 to +55 °C
• Storage Temperature: -20 to +85 °C
• Humidity: 20 to 80% relative, non-condensing
• Altitude: To 10,000 ft
• Cooling: Forced air convection
• Form Factor: Double Eurocard (6U), 160 × 233.35 mm
– Key Features
• Integrated built-in test for channel-level diagnostics
• Automatic surge current shutdown protection
• Thermal shutdown protection
• Output clamp diodes for inductive load protection
• Fail LED for fault isolation
• Optional user-supplied warming resistor sockets
• Optional pull-up resistors for electronic switch outputs
– Interfaces
• Two 96-pin female connectors (P3, P4) with IDC or discrete wire termination options
• Optional user ground connection via P2 connector (VMIACC-0132 accessory recommended)
• VMEbus slave addressing: 39/3D:29/2D with A24:A16:D32/D16/D08 (EO) mnemonics
– Typical Applications
Industrial automation, high-voltage switching control, and systems requiring channel-level built-in diagnostics and fault isolation.
