RTU — Remote Terminal Unit
Terma
Terma’s Remote Terminal Unit (RTU) is a modular spacecraft subsystem that connects the On-Board Computer to platform electronics including thrusters, heaters, sensors, pyrotechnic devices, and power switches. The RTU collects housekeeping telemetry (temperatures, voltages, currents), issues commands, controls valves, manages power distribution, and monitors system health in real time. The modular plug-in architecture enables configuration […]
Key figurescomparable across the catalogue
- Power
- 15 W
- TRL
- 9
Normalised to common units so this product can be compared with others in its category. The supplier's own wording is below.
As published by the supplier
- Function
- OBC interface to platform electronics: commanding, TM acquisition, thermal, power distribution, valve control
- Architecture
- Modular plug-in modules on common backplane
- Main bus voltage
- 20–100 V (any spacecraft bus, off-the-shelf)
- Power consumption
- ~15 W
- Primary interface
- MIL-STD-1553
- TRL
- 9 (40+ flight models delivered)
- Flight heritage
- H2Sat (in-orbit 2023), Electra, LUXEOSys/NAOS, HERA, CO2M
About
Terma’s Remote Terminal Unit (RTU) is a modular spacecraft subsystem that connects the On-Board Computer to platform electronics including thrusters, heaters, sensors, pyrotechnic devices, and power switches. The RTU collects housekeeping telemetry (temperatures, voltages, currents), issues commands, controls valves, manages power distribution, and monitors system health in real time. The modular plug-in architecture enables configuration for different platform sizes and interface types without redesigning the unit. The RTU operates across any spacecraft main bus voltage from 20 V to 100 V, with power consumption of approximately 15 W. MIL-STD-1553 is the primary interface. Terma has delivered over 40 RTU flight models with recent missions including H2Sat (2023, in-orbit, 50 V main bus), Electra, LUXEOSys/NAOS, HERA, and CO2M.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.