SpaceTech RTU & Data Management

The cPCI-Serial-Space based Remote Terminal Unit (RTU) is designed to collect data from different avionic sensors and to control several avionic actuators. Main part is a cPCI-Serial-Space based IO-Module that can be used centralized inside an onboard-computer (e.g. small satellites) or decentralized in a RTU (large satellites with distributed I/O’s). The RTU is scaleable by using one or more I/O-modules.

Based on this concept also cold- and hot redundancy architectures can be realized. A dual core LEON3 processor provides enough processing power to perform pre-processing of sensor data. Based on STI’s Core Avionics concept, the RTU also provides all protected supply voltages necessary to power the connected avionic components.

SpaceTech Remote Terminal Units in detail

  • Analogue and digital standard interfaces
  • LCL protected supply voltages to power avionic or payload components
  • Switched power outlets for heaters and cold gas thrusters
  • Dual Core LEON3 processor, also usable for data pre-processing
  • Connection to an onboard-computer via CAN-Bus or SpaceWire
  • Standardized IO-module based on cPCI-Serial-Space standard

  • PT1000 interface: 28 channels
  • Analogue voltage input: 8 channels
  • Analog input resistive pressure transducer: 2 channels
  • Supply voltage resistive pressure transducer: 2 channels
  • Discrete digital input: 2 channels
  • Discrete digital output: 4 channels
  • Supply voltage, analogous +/-5.. 10V: 1 channel
  • Spacewire interface: 2 channels
  • UART interface (TX+RX): 5 channels
  • LCL protected power outlets: 3 channels
  • Current outlet: 2 channels
  • Pressure valve outlet: 10 channels
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Electronics & Sensors

Joachim Krieger