The Sensoray 118 is a 16-bit, 8-channel smart analog-to-digital VME module engineered for high-resolution data acquisition in VME bus systems. Each of eight differential input channels is individually programmable to condition and digitize signals from thermocouples, RTDs, strain gauges, voltage sources, 4-20 mA current loops, thermistors, and resistance measurements. An on-board microcontroller continuously scans all channels, performing amplification, digitization, filtering, linearization, and conversion to engineering units before storing results in onboard memory for immediate host access.
Technical Specifications
• Analog Input Channels: 8 differential inputs
• Resolution: 16-bit A/D conversion
• Scan Rate: <22 milliseconds per conversion cycle; 45 channels/second aggregate throughput
• Signal Conditioning: Per-channel programmability; pulsed excitation to minimize self-heating; four-wire circuits for RTDs, thermistors, and resistors; cold-junction compensation for thermocouple inputs
• Calibration: Fully electronic with periodic internal reference sampling; factory calibration stored in EEPROM for board interchangeability
• Memory: Onboard storage for processed sensor data
– Key Features
• Supports seven distinct sensor types with dedicated signal conditioning
• Excitation provided to passive sensors; selectable excitation topology reduces measurement uncertainty
• On-board microcontroller handles continuous channel scanning and data processing without host intervention
• Factory-calibrated electronics eliminate need for field recalibration during normal operation
– Typical Applications
• Multi-sensor industrial process monitoring
• Temperature measurement with mixed sensor types (thermocouple, RTD, thermistor)
• Strain and load cell data acquisition
• 4-20 mA sensor integration
• VME-based test and measurement systems requiring centralized analog front-end
– Compatibility & Integration
• VME bus interface (3U and 6U front panel options available)
• Field wiring via 40-conductor flat cable to remotely mounted screw-termination board
• EEPROM-stored calibration enables direct board swapping without reconfiguration
Note: This product is obsolete. Archived specifications are provided for existing user support.
