The Keithley KUSB-3116 is a multifunction data acquisition USB module combining analog input/output, digital I/O, and counter/timer functions in a compact, metal-enclosed package. USB 2.0 connectivity (480 Mbps, backward compatible with USB 1.1) enables high-speed data transfer to host systems. A 500V isolation barrier protects connected equipment from voltage transients, surges, and electrostatic discharge.
## Technical Specifications
**Connectivity & Processing**
• USB 2.0 (up to 480 Mbps) / USB 1.1 support
• Windows 2000, Windows XP (Professional Edition required for USB 2.0)
• Minimum processor: Pentium 233 MHz
• 500V isolation barrier
**Analog Input**
• 16-bit A/D converter, 500 kSamples/s throughput
• 16 single-ended or 8 differential channels
• Programmable gain: 1, 2, 4, 8
• Input ranges: ±10 V (gain 1), ±5 V (gain 2), ±2.5 V (gain 4), ±1.25 V (gain 8)
• 1024-location channel-gain list for continuous/triggered scanning
• Very high input impedance
**Analog Output**
• Four 16-bit D/A converters, 500 kSamples/s output rate
• ±10 V output range
• Waveform memory: 128 kSamples (single channel) or 24 kSamples per channel (all channels)
• Deglitched DACs
• Continuous and waveform output modes with output channel list support
**Digital I/O**
• 16 digital input lines (readable via analog input channel-gain list)
• 16 digital output lines (controllable via output channel list, 12 mA sink capability)
• 1 dynamic digital output line synchronized to analog input reads
**Counter/Timer**
• Five 32-bit counter/timer channels
• Event counting, up/down counting, frequency measurement, edge-to-edge measurement
• Continuous and one-shot pulse output modes
## Key Features
The 1024-location channel-gain list enables flexible scanning configurations with mixed gain settings across analog inputs. Deglitched DAC outputs minimize noise in signal reconstruction. Digital outputs directly control external solid-state relays. Counter/timer channels support both measurement and signal generation tasks.
## Typical Applications
Multichannel data logging, process monitoring, waveform generation, frequency measurement, relay control, and triggered acquisition in industrial and laboratory environments.
## Compatibility & Integration
Portable metal enclosure suitable for field deployment. Operates on legacy Windows platforms (2000/XP) with standard Pentium-class processors and USB 2.0 infrastructure.
