The Interface Technology IO110VXI is a 128-channel CMOS digital I/O module designed for high-density signal interfacing in industrial and automation applications. It delivers simultaneous read/write capability across all 128 channels, software-configurable I/O groups, and multiple logic format support including CMOS, TTL, TTL Open Collector, Differential TTL, and Switched HV outputs. The module integrates on-board processing, external handshaking, and VXI TTLTRG synchronization for multi-module operation.
## Technical Specifications
• **Channels:** 128 I/O channels per module
• **Channel Configuration:** Groups of 8 channels software-configurable as input or output
• **Logic Formats:** CMOS, TTL, TTL Open Collector, Differential TTL, Switched HV outputs
• **Data Fields:** User-defined 1 to 32 bits wide; multiple fields supported
• **Simultaneous Operations:** Full 128-bit latched reads and double-latched writes ensure all output channels transition simultaneously
• **Handshaking:** External I/O handshaking with 4 strobes per connector; memory-backed pins for timing control
• **Control Lines:** 4 tri-state control/output enable inputs per connector
• **Connectors:** Four 50-pin IDC connectors on front panel
• **Termination:** User-configurable I/O termination
• **Isolation:** Optical, 3750 V
## Electrical Characteristics
• **Input Voltage:** Vih 2.2 V min, Vil 0.8 V max
• **Output Current (Standard):** −40 mA to +40 mA
• **Output Current (Open-Collector):** −128 mA
• **Carry Current:** 120 mA
• **Differential TTL:** Vol 0.50 V, Voh 2.5 V, Iol 20 mA, Ioh −20 mA max, skew 21 ns max per card (50 ns added across multiple cards), rise/fall time 14 ns typical
• **Switched HV:** Up to 100 V; sourced from user supply or backplane options (+5, ±12, ±24 V)
## Key Features
• Tri-state output control for bus emulation
• VXI TTLTRG synchronization for linked multi-module operation
• On-board processor for autonomous operation
• Simultaneous reads and writes on any field size or count
## Typical Applications
Industrial automation, digital signal acquisition, multi-channel control systems, and real-time data capture requiring high channel density and deterministic timing.
## Compatibility & Integration
Part of the IO50–IO130 family. Operates within VXI systems utilizing TTLTRG for cross-module triggering.
