Abaco Systems / VMIC VMIVME-2170A-110 32-Bit Optically Coupled Digital Output Board

The Abaco Systems / VMIC VMIVME-2170A-110 is a 32-bit optically isolated digital output board for VMEbus systems. It delivers 32 independent optically coupled outputs with selectable current drive and configurable data polarity, providing high noise immunity and field-to-VMEbus isolation in demanding industrial control applications.

Technical Specifications

• Output Channels: 32 optically isolated digital outputs


• Data Transfer Support: 8-bit and 16-bit transfers on VMEbus


• Addressing: Four 8-bit ports or two 16-bit registers; any 32-bit boundary within short supervisory or short non-privileged I/O space


• Address Selection: 14 on-board DIP switches


• Output Current Options: 2.5 mA or 300 mA (field-configurable)


• Output Voltage Tolerance: Up to 30 V


• Isolation Performance: - 1 kV sustained field-to-VMEbus - 6 kV pulsed field-to-VMEbus (one second duration) - 500 V maximum sustained channel-to-channel


• Output Configuration: Open collector style with source/sink capability (low current); field-configurable pull-up resistors; external pull-up voltage option for maximum isolation


• Data Polarity: Positive True or Negative True selectable


• Form Factor: Double Eurocard (9.2 in. / 233.4 mm height)


• Connector: 64-pin DIN front panel


• VMEbus Access: User-selectable supervisory or non-privileged short I/O via jumper; factory configured for short supervisory I/O

Key Features

• High isolation maintains signal integrity in electrically noisy environments


• Dual current output options accommodate diverse load requirements


• Flexible addressing within standard I/O memory space


• Open collector outputs enable direct integration with diverse control systems


• Externally supplied pull-up voltage maximizes isolation performance

Typical Applications

• Industrial process control and monitoring


• Equipment shutdown and safety control circuits


• Relay and solenoid driver interfaces


• High-noise factory automation environments

Compatibility & Integration Fully compliant with VMEbus mechanical and electrical standards. Operates in any VMEbus slot except slot 1. Supports both supervisory and non-privileged access modes within the short I/O address space.