Abaco Systems / VMIC VMIVME-2128-001 128-bit High-Voltage Digital Output Board with Built-In-Test

The Abaco Systems VMIVME-2128-001 is a 128-bit high-voltage digital output board for VMEbus systems. It delivers high-current sink outputs across 128 channels, supporting voltages from 5 to 48 VDC (55 V absolute maximum). Each channel provides 600 mA continuous sink capability with automatic surge current shutdown protection up to 990 mA, thermal shutdown, and inductive flyback protection via output clamp diodes. Integrated Built-in-Test (BIT) logic enables software-controlled verification of each output channel for rapid fault isolation and system diagnostics, with front panel Fail LED indication. The board addresses four 32-bit longwords, eight 16-bit words, or sixteen 8-bit bytes, supporting 8, 16, and 32-bit data transfers. Positive true logic operation energizes output drivers with logic one inputs. Optional pull-up resistor configurations accommodate different voltage levels: 270 Ω/5V/6V, 1.5 kΩ/12V/14V, 6.8 kΩ/24V/30V, and 27 kΩ/48V/55V. SIP sockets accept user-supplied warming resistors for applications exceeding 990 mA inrush current. Two 96-pin female connectors (P3 and P4) provide front panel I/O connections with user ground options on P2.

Technical Specifications

• Output Channels: 128 digital outputs
• Output Configuration: High-voltage, high-current sink drivers
• Voltage Range: 5 to 48 VDC (55 V absolute maximum)
• Current Drive: 600 mA per channel sink capability
• Surge Protection: Automatic shutdown at 990 mA surge current limit
• Thermal Protection: Integrated shutdown circuit
• Data Transfer: 8, 16, or 32-bit transfers
• Logic Polarity: Positive true (logic 1 enables driver)
• Power Consumption: Typical 3.0 A at +5 VDC

– Key Features

• Built-in-Test logic with software-controlled channel verification
• Inductive flyback protection with output clamp diodes
• Configurable pull-up resistor options for multiple voltage standards
• SIP sockets for inrush current management resistors
• Front panel Fail LED for diagnostic indication
• Addressable in four 32-bit longwords, eight 16-bit words, or sixteen 8-bit bytes

– Typical Applications

• Relay drivers
• Lamp drivers
• Solenoid drivers
• Stepper motor control

– Compatibility & Integration

Full VMEbus compliance (ANSI/IEEE STD 1014-1987, IEC 821 and 297). Compatible with Intelligent I/O Controllers. Address mnemonics: A24:A16:D32/D16/D08 (EO); Slave: 39/3D:29/2D.