The NI 780869-01 is a Camera Link I/O Extension PCIe board that expands the I/O capabilities of National Instruments image acquisition devices. It connects directly to compatible NI frame grabbers via PCIe, providing bidirectional TTL channels, optically isolated inputs and outputs, quadrature encoder support, and programmable camera power delivery. This extension board integrates into machine vision and industrial automation systems requiring enhanced signal control and acquisition synchronization.
Technical Specifications
Interface & Compatibility
• Camera Link interface
• PCI Express (PCIe) form factor
• Compatible with NI PCIe-1477, PCIe-1437, and PCIe-1473R frame grabbers
• Dimensions: 10.7 cm × 17.5 cm (4.2 in × 6.9 in)
TTL I/O
• 8 channels of bidirectional TTL I/O
• Logic levels: 3.3 V (LVTTL/LVCMOS)
• Input threshold: High 2.0 V, Low 0.8 V
• Minimum pulse detection: 10 µs
• Input noise filtering available
Optically Isolated Inputs
• 3 channels, 24 V-compatible, current sinking
• Input voltage range: 0 V to 30 V DC
• Turn-on threshold: 3.5 V to 30 V
• Turn-off threshold: 0 V to 2 V
• Turn-on current: 7.1 mA (14 mA maximum)
• Reverse polarity protection: ±30 V
Optically Isolated Outputs
• 3 channels with programmable polarity
• 3.3 V (LVTTL/LVCMOS) compatible
Quadrature Encoder Input
• 1 input supporting single quadrature encoder (2 channels)
• Differential (RS-422) or single-ended operation
• Voltage range: 0 V DC to 5.5 V DC
• RS-422 differential threshold: ±0.2 V maximum
• Single-ended TTL-compatible thresholds
• Maximum count rate: 5 MHz
• Only one quadrature encoder can be active at a time (frame grabber or extension board)
Camera Power
• Selectable +5 V or +12 V output
• Power over Camera Link (PoCL) compatible with supported frame grabbers
– Typical Applications
Machine vision systems requiring extended trigger and control signals, scientific imaging with encoder feedback, industrial automation with isolated signal conditioning, and distributed camera arrays with synchronized acquisition.
