Abaco Systems / VMIC VMIVME-1150-323 64-Bit Optically Coupled Digital Input Board

The Abaco Systems / VMIC VMIVME-1150-323 is a 64-channel optically isolated digital input board for VMEbus systems. It acquires logic-level signals across a wide voltage range with 1,000 V sustained and 7,500 V pulsed isolation, making it suitable for industrial control, data acquisition, and signal monitoring in harsh electrical environments. The board supports 8-bit or 16-bit data transfers with individually addressable ports, configurable input polarity, and jumper-selectable filtering for noise rejection.

Technical Specifications

• Channels: 64 optically coupled digital inputs


• Input Voltage Range: 5 VDC to 48 VDC


• Input Configuration: Voltage sourcing or current sinking; configurable for voltage input or contact closure


• Data Polarity: Positive or negative true, field-selectable


• Isolation: 1,000 V sustained; 7,500 V pulsed


• Data Transfers: 8-bit or 16-bit modes supported


• Addressing: Individually addressable 8-bit ports on 8- or 16-bit boundaries in short supervisory or nonprivileged I/O space


• Board Address: DIP switch selectable; supported in any VMEbus slot except slot 1


• Input Filtering: Jumper-selectable filtered input options


• Form Factor: Standard VME double-height Eurocard (160 mm × 233.5 mm)


• Power: +5 VDC @ 1.1 A typical, 2.2 A maximum


• Operating Temperature: 0 °C to +55 °C


• Storage Temperature: -40 °C to +85 °C


• MTBF: 139,706 hours (MIL-HDBK-217F)

Key Features

• Dual 64-pin DIN connectors for signal I/O


• VMEbus electrical and mechanical compatibility


• DTACK reply generation for decoded short supervisory or nonprivileged access


• Drop-in replacement for legacy VMIVME-1150 models with software and cable compatibility

Typical Applications Industrial process control, data acquisition systems, machine monitoring, and equipment with mixed-signal sensing requirements where optical isolation is critical.

Compatibility & Integration Fully compatible with VMEbus architecture. Operates within any standard VME slot configuration except slot 1. Includes hardware reference manual and IOWorks integration documentation.