Abaco Systems / VMIC VMIVME-1111-000 64-Bit High-Voltage Digital Input Board

The Abaco Systems VMIVME-1111-000 is a 64-channel high-voltage digital input board for VMEbus systems. It accepts input signals ranging from 1.25 VDC to 66 VDC with user-selectable thresholds, supporting contact closures, voltage sources, current sinking, and differential signals. The board delivers 8-, 16-, or 32-bit configurable data transfers across individually addressable ports.

Technical Specifications

• Input Channels: 64 channels organized in groups of 32


• Data Transfer Modes: Configurable for 8, 16, or 32-bit transfers


• Form Factor: Double Eurocard VMEbus module (ANSI/IEEE STD 1014-1987, IEC 821 and 297)


• Input Voltage Range: 1.25 VDC to 66 VDC (user-selectable thresholds)


• Differential Signal Performance:

Common-mode input voltage: -30 V to +66 V

Input sensitivity: ±100 mV (common-mode range -7 V to +12 V)

Input impedance: 33 kΩ

RS-422/RS-485-compatible differential receivers with ±7 V noise immunity
• Single-Ended Signal Performance:

Input impedance: 33 kΩ

Threshold accuracy: 1% across 66 V range (typical)

• Input Filtering: Optional series RC terminator or low-pass filter (0.14 ms time constant)


• Power Consumption: +5 V at 1.4 A typical, 2.0 A maximum


• Operating Temperature: 0 to 55 °C


• Storage Temperature: -20 to 85 °C


• Relative Humidity: 20 to 80%, noncondensing


• Connectors: Dual 64-pin DIN 41612 high-reliability connectors


• MTBF: 186,600 hours (MIL-HDBK-217F)

Key Features

• Per-group jumper selection for contact closure, voltage source, current sink, or differential input modes


• Open-circuit logic programmable as zero or one


• On-board built-in test (BIT) logic with front-panel Fail LED indicator


• Thirteen jumpers enable full short I/O address map selection


• Independent control and status register (CSR) addressing


• Eight ports individually addressable on 8-, 16-, or 32-bit boundaries


• Forced-air convection cooling

Typical Applications Industrial process control, embedded avionics systems, military instrumentation, and distributed I/O architectures requiring high-voltage signal acquisition in harsh environments.

Compatibility & Integration Software compatible with VMIVME-1110. VMEbus-compliant for integration into existing supervisory and nonprivileged short I/O mapping systems.