Abaco Systems / VMIC VMIVME-2232-010 32-Channel Relay Output Board with Built-in-Test (BIT)

The Abaco Systems / VMIC VMIVME-2232-010 is a VMEbus-compatible relay output board delivering 32 Form C (SPDT) channels for direct control of external loads. Built-in-Test (BIT) capabilities enable comprehensive active component diagnostics and relay coil state monitoring, with test activation via software, power-up, or system reset. The board employs dual 50-pin SCSI connectors organized as four 8-bit ports, accessible on 8-, 16-, or 32-bit boundaries. All relay drivers are disabled during test mode to prevent unintended output switching while maintaining full data path verification through write/read-back and inverted data readback operations.

– Technical Specifications

• Relay Channels: 32 Form C (SPDT) outputs
• Contact Ratings: 60 W, 125 VA maximum; 220 VDC / 250 VAC maximum voltage; 2 A maximum switching current; 3 A maximum carry current
• Data Transfer: 8, 16, or 32-bit word access
• Addressing: Four ports on 8-, 16-, or 32-bit boundaries; jumper-selectable Address Modifier Codes for short supervisory and short non-privileged I/O access; factory-configured for short supervisory I/O
• Control & Status Register (CSR): Fail LED control, relay driver enable, and BIT circuitry management via three control bits
• Connectors: Dual 50-pin SCSI-compatible; four 8-bit port organization
• Form Factor: Double height VMEbus board

– Key Features

• Internal logic monitors relay coil state in real time
• Software-controlled test mode with hardware relay driver disable for safe diagnostics
• Special test data write/read capability for data path validation
• Online inverted data readback for operational health verification
• Front panel Fail LED; illuminated at power-up and under program control
• Optional contact protection electronics for DC switching applications

– Compatibility & Integration

Full VMEbus specification compliance enables straightforward integration with Intelligent I/O Controllers. Software compatibility with the VMIVME-2532 and VMIVME-2533 boards ensures drop-in functionality within existing relay control architectures.