The Curtiss-Wright/Pentland Systems MPV924 is a 6U VMEbus digital input/output board delivering 96 TTL-compatible channels for industrial control, data acquisition, and automation systems. Each channel is individually programmable as input or output, with group configuration via DATA DIRECTION REGISTER. The board sources VMEbus interrupts across seven software-selectable levels and monitors 16 I/O lines with custom-programmable change-of-state detection. Six 34-way latching IDC connectors provide field access, compatible with Burr-Brown termination panels for screw-terminal wiring.
## Technical Specifications
• **Form Factor:** 6U Single Width
• **Digital Channels:** 96 TTL-compatible channels, individually or group-programmable
• **Channel Configuration:** Programmable as inputs or outputs; channels reset to input on power-up, SYSRESET, or SOFTRESET
• **Interrupt Monitoring:** 16 I/O lines with software-programmable change-of-state response
• **Interrupt Control:** Two 16-bit interrupt registers; software-selectable levels 1–7
• **I/O Connectors:** Six 34-way latching IDC connectors
• **VMEbus Interface:** A16/A24:D16/D08(EO) addressing; DTB Slave; IRQ 1–7
• **Power Supply:** +5V DC ±5% @ 2A max (VME bus); +5V DC @ 450mA typical for outputs (fused)
• **Operating Temperature:** 0°C to 60°C
## Key Features
• TTL input thresholds: 0.8V DC max (low), 2.0V DC min (high)
• TTL output levels: 0.5V DC max (low), 2.4V DC min (high)
• Output drive: 24mA DC max (low), 2.6mA DC max (high)
• Input impedance: 60µA DC max (high level), −0.62mA DC max (low level)
• Change-of-state hysteresis: 0.2V DC min
• IEEE STD 1014-1987 VMEbus compliance (electrical and mechanical)
## Typical Applications
• Industrial automation and discrete logic control
• Multi-channel data acquisition systems
• Process monitoring and supervisory control
• Test and measurement equipment integration
## Compatibility & Integration
• VMEbus: IEEE STD 1014-1987
• Termination Panels: Burr-Brown PCI-20058T-1 and PCI-20025T-2 (screw terminal connection)
