en:wiring [ОрбиКрафт 3D]

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What is Orbicraft for?

Assembling the OrbiCraft 3D

OrbiCraft 3D interfaces

Work with earth-based VHF

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Work through the WEB interface

Houston Control Center Software

Arduino-Based payload

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en:wiring

Assembling the cabling network

About the cabling network

The onboard cabling network is necessary for information exchange between subsystems and the central computer, as well as for supplying power to the subsystems.

Satellite subsystems have several redundant connectors for connecting to the on-board network. Thus, the device connected to the on-board network is not only itself available for information exchange with it, but also provides the ability to connect through itself subsequent subsystems in the circuit.

The information network is built using the UniCAN protocol. For ease of installation, the power supply lines, and the information network are combined into one ribbon cable. Subsystems are connected through the IDC-10F (DS1016-10) connector on the ribbon cable side and IDC-10M (DS1013-10) connector on the instrument side. Since a different arrangement of the elements of the constructor is possible, the determination of the length of each cable, its configuration, and production is up to the user.

IDC-10F connector

A wide ribbon cable with IDC-14F (DS1016-14) connectors is used to connect the OBC with the camera adapter.

IDC-14F connector

A narrow ribbon cable with IDC-6F (DS1016-06) connectors is used to connect the OBC and HF.

IDC-6F connector

10 pin ribbon cable

Preparation

  • From the OrbiKraft kit take: crimper, wire cutters, ribbon coil, 2 IDC-10F connectors, ribbon tester and 12V power adapter.
  • Cut the cable of the required length from the coil of the ten-channel ribbon cable with scissors.

Ribbon cable assembly

  • Insert the supplied yellow insert into the crimper.
  • Place the connector in the yellow insert under the center of the crimper clamping bar.
  • While holding the connector crimper with one hand, place the end of the ribbon cable into the connector with the other hand.
  • Clamp the connector with the inserted end of the cable with a crimper until you hear a characteristic snap.
  • Visually verify that the connector snaps into place.
Make sure that the cable is completely in the connector but does not stick out too much from the back side.

Before applying force for snapping, lightly press the latch, make sure that the conductors of the loop evenly fall between the contacts and only then finally snap the connector.
  • Repeat the procedure for the other end of the loop with the second IDC-10F connector.
When crimping a flat cable, it is important to remember that the directions for installing the connectors are the same, as shown in the illustrations below.

Correct assembly:

Incorrect assembly:

The existing pinout of the connector (the purpose of each of the pins) minimizes the likelihood of equipment damage if the ribbon is improperly done by the user. However, it does not guarantee that the device cannot be damaged in principle. Note also that the production and refinement of ribbons by the user does not require special skills and tools.

Connecting functional kit modules

When assembling a cable network, be sure to install a terminating resistor (terminator) into one of the empty connectors.

Terminating resistor (terminator)

Terminator, an energy absorber matching device (usually a resistor) at the end of a long line, the resistance of which is equal to the characteristic impedance of this line. With regard to electronics, the word “terminator” is used mainly in computer jargon, synonymous with the expression “matched load”. The CAN bus is terminated with a 120 Ohm resistor.

Checking the ribbon cable

  • Connect the tester to the 220V network using the 12V power adapter included in the kit.
  • Insert the assembled ribbon cable into the corresponding connectors on the ribbon cable tester. The green OK light should turn on.
If your yellow light “Break” is still on, then you have an open circuit. Most likely, you have not fully compressed the ribbon cable.

If you have a red “Short circuit” light on, then either you damaged the insulation of two adjacent channels when crimping the loop, or you placed two connectors incorrectly relative to each other. Try crimping the ribbon cable again following the instructions above.
en/wiring.txt · Last modified: 2021/09/20 15:27 by golikov