L3-CDH-DIST-IO
ESSENTIAL
COMMAND CONTROL
Level 3 · hardware
Analog/Digital I/O Modules
Multi-Channel Sensor Interface Electronics
Signal conditioning and digitization modules interfacing with Ark sensors and actuators
Purpose
Signal conditioning and digitization modules interfacing with Ark sensors and actuators
Context
Child of L2-CDH-DIST
Principles
- ▸Multi-channel ADCs digitize analog sensor signals (temperature, pressure, voltage)
- ▸DAC outputs drive analog actuators (valve positioners, heater controllers)
- ▸Signal conditioning (amplification, filtering, isolation) matches sensor characteristics
- ▸Galvanic isolation prevents ground loops between distributed nodes
Typical implementations
- ▸Analog Devices AD7768 8-channel simultaneous-sampling ADC
- ▸Texas Instruments ADS131M08 delta-sigma ADC for precision sensing
- ▸National Instruments CompactRIO industrial I/O modules (concept adapted)
Lunar considerations
- ▸Radiation causes ADC/DAC accuracy degradation (INL, offset drift)
- ▸Wide temperature range requires temperature-compensated signal conditioning
- ▸Must handle diverse sensor types (RTD, thermocouple, strain gauge, voltage)
Specifications
Functional
| primary function | Signal conditioning and digitization modules interfacing with Ark sensors and actuators |
Physical
| materials | Rad-hard ADCs, Precision resistor networks, Isolation amplifiers |
Interfaces
Provides
- Digitized sensor data for processing
Requires
- Thermal sensor signals requiring digitization
Cite this entry
Lunar Ark Codex. "Analog/Digital I/O Modules" (L3-CDH-DIST-IO). Retrieved 10 September 2026, from https://lunarark.com/entry/L3-CDH-DIST-IO
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.