Remote Terminal Units Space Terma


Flexible and modular interface units for LEO, MEO, GEO and deep space satellites.

Flexible Remote Terminal Units

Remote Terminal Units (RTU) are applied as part of the satellites data handling system to extend the capabilities and the interfaces of the On-Board Computer. Terma’s RTU system provides a wide range of capabilities for monitoring, controlling, and powering of satellite equipment including sensors, thermistor, Attitude and Orbit Control System (AOCS) equipment and heaters.

Maximum flexibility during spacecraft integration

Customized Remote Terminal Units concept

In-house test and manufacturing facilities

Remote Terminal Unit Terma Space
For all mission types

Modular and flexible unit design

Terma's RTU system enables fast assembly of units of "any" size. Units can be assembled of off-the-shelf and custom-made modules as needed, and the customer can through configuration commands and tables modified the unit's operation. All unit configurations can as standard be manufactured to support any main bus range from 20V to 100V.
Terma RTU In Use DLR Heinrich Hertz Satellite in OHB, Bremen integration
Simplified satellite architecture

Distributed RTU system

Terma’s RTU system are designed as a small formfactor unit to support small and large satellites. For smaller satellites a single unit is typically able to provide the needed interfaces, while larger satellite may have several RTUs distributed throughout the satellite. The distributed unit architecture offer a number of benefits compared to a traditional single RTU, easier and more flexible satellite integration, simpler harness routing, lower harness mass and easier adaption to the satellite requirements.
Terma Space Rtu A4 V10
For all interface types

RTU Modules

Terma have currently ten different off-the-shelf modules which provides a wide range of functionalities including; High Power Commanding, High accuracy signal and temperature acquisition, Serial data interfaces, Reaction wheel control and monitoring, Magnetorquer driving, Flow control valve, latch valve and ball valve driving, Voltage supply distribution, and Heater power distribution.
Remote Termainal Units Module
Flexible Satellite Integration

Maximum Flexibility during satellite integration

The Remote Terminal Units concept provides great flexibility, allowing to add, remove, or replace modules without unit dismounting during spacecraft integration phase. High ESD tolerance on all external interfaces (>4 kV) ensures robustness in the integration phase.
Galileo Constellation ESA P. Carril ESA - P. Carril
For all environments

Mechanical, Thermal, and Radiation Endurance

Mechanical design of the assembled units is robust to sustain vibration and shock levels generates by most of the world’s launchers. A direct module thermal contact area to satellite structure ensures thermal segregation and proper temperature balance in the unit during all electrical load combinations. The electrical design provides full performance after 15 years in Geostationary Orbit


Terma has delivered more than 40 flight model RTUs for along range og missions, including H2Sat, Electrra, LUXEOSys (NAOS), HERA, and CO2M.


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Søren Pedersen SPDS

Director, Sales and Business Development

Søren Pedersen