The Abaco Systems IP-Thermistor is a single-high IndustryPack module that delivers precise temperature monitoring across 16 independent thermistor channels. Built for industrial applications requiring reliable, high-speed thermal data acquisition, the module integrates a switched 1 mA current source, multiplexers, amplifiers, and a 12-bit ADC to enable accurate two-wire thermistor measurements with minimal self-heating effects.
– Technical Specifications
Measurement Architecture
• 16 temperature input channels supporting two-wire thermistor sensors
• Switched, highly stable 1 mA current source with sequential channel activation
• 12-bit ADC with integral sample/hold; data sign-extended to 16-bit words
• Per-channel conversion cycle: 17 µsec
• Maximum scan rate: 58.8 Ksample/sec
• Programmable 16-bit pacer clock with 1 µsec resolution, configurable from 17 to 65,535 µsec intervals
Protection & Storage
• Heavy-duty over-voltage protection rated ±35 V continuous (with or without power applied)
• 2 Kbit calibration EEPROM for per-channel thermistor type and calibration data storage
Control & Signaling
• Standard IndustryPack bus interface
• Programmable vectored interrupts upon conversion completion
• ADC_BUSY status bit available for host polling
• Programmable pacer clock functions as general-purpose timer with interrupt capability
– Key Features
• Minimized thermistor self-heating through pulsed current excitation
• High-speed conversion enables real-time multi-channel thermal monitoring
• On-module EEPROM simplifies system integration and calibration management
• Robust input protection sustains ±35 V faults without component degradation
• Flexible interrupt or polling-based completion detection for varied host architectures
– Typical Applications
Temperature-critical industrial environments including thermal monitoring in distributed sensor networks, process control systems, and equipment protection circuits where 16-channel simultaneous acquisition and high scan rates are required.
– Compatibility & Integration
Designed as a plug-in module for carrier boards supporting the IndustryPack (IP) form factor. Standard IP bus interface ensures compatibility with Abaco Systems, SBS, and Greenspring host platforms.
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