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en:wiring [2018/10/10 11:58]
en:wiring [2020/03/25 16:28] (current)
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-**Cable ​network**+====== Cabling ====== 
 +**About the Cable Network**
 {{ ru::​wiring1.jpg?​direct&​200|}} {{ ru::​wiring1.jpg?​direct&​200|}}
-The on-board cable network is necessary for information exchange between on-board devices and the central computer, as well as for supplying power to these devices. 
-The satellite subsystems ​have two redundant connectors for connection to the on-board ​network. ​Thusthe device connected to the on-board ​network ​is not only available ​for information exchange, ​but it also provides the possibility of connecting through a “daisy-chain network” of subsequent subsystems ​in the sequence.+The satellite ​depends on its cable network for information exchange between subsystems and the central computer as well as powering its subsystems. 
 +Satellite ​subsystems ​are provided with two redundant connectors for the orbiter ​network. ​In that mannerdevice connected to the onboard ​network ​will not only be itself accessible ​for communication ​but will also enable ​daisy-chain ​connections to subsequent components in the circuit. 
 +The data exchange ​network ​is based on a bus architecture using RS-485 serial interfaces. Power and data network lines are combined into a single ribbon cable to facilitate assembly. Subsystems are connected using a DB-9F (female) connector on the harness side and a DB-9M (male) connector on the device side. Considering that components ​of the construction set can be arranged ​in different ways, sizing and making individual ribbon cables of necessary lengths and configurations will be left to the user.
-The information network is built on the bus architecture using serial RS-485 interfaces. It is important to note that for ease of installationthe power lines and the information network are combined into one loop. Subsystems are connected via the DB-9F (female-ended) connector on the harness side and DB-9M (male-ended) connector on the device side. Since different arrangements ​of the construction set elements are possible, the definition of the length ​of each loop, its configuration,​ and eventually ​the production is defined by the user+**Preparations** 
 +  * Take the following items out of the Orbicraft kit: crimperwire-cutters, ribbon cable spool, 2 female ​connectors, ribbon cable tester ​and 12VDC power adapter; 
 +  * Cut a ribbon cable of required ​length ​from the 9-channel ribbon cable spool.
-A serial connection of all network devices is possible by implementing a "​point-to-point"​ loop-type and creating branches using loops with more than two connectors. ​+**Ribbon Cable Assembly**
-When crimping the stub, it is important to recall ​from the installation instructions that the connectors should match as shown in the illustrations ​below.+  * Insert a yellow fixture ​from the kit into the crimper; 
 +  * Place the connector into the yellow fixture ​below the clamping bar of the crimper; 
 +  * Holding the crimper with the connector with one hand, insert cable end into the crimper with your other hand; 
 +  * Compress the connector with cable end inserted until the crimper makes a distinct click; 
 +  * Perform a visual check to make sure that the connector has clicked into place.
-**//​Correct ​connection//**+<note important>​ 
 +**//Take care to ensure that the ribbon cable has fully entered the connector but does not protrude too far from its back side.//** 
 +<note important>​ 
 +**//Before applying force to the crimper to click, press the latch gently to make sure that cable wires fit evenly between contact pins and only then finally click the connector into place.//​** 
 +  * Repeat the same operations with the opposite end of the ribbon cable having the second female connector. 
 +<note important>​ 
 +**//When crimping the cable, remember that all connectors must be facing the same side, as shown in pictures below.//​** 
 +**//​Correct ​assembly://**
 {{ru:​wire2x.jpg?​direct&​200|}} {{ru:​wire_3x.jpg?​direct&​300|}} {{ru:​wire2x.jpg?​direct&​200|}} {{ru:​wire_3x.jpg?​direct&​300|}}
-**//Incorrect connection//**+**//Wrong assembly://**
 {{ru::​wrongwire2x.jpg?​direct&​200|}} {{ru:​wrongwire_3x.jpg?​direct&​300|}} {{ru::​wrongwire2x.jpg?​direct&​200|}} {{ru:​wrongwire_3x.jpg?​direct&​300|}}
-The existing ​connector ​pin assignment ​(the purpose ​of each contact) minimizes the possibility ​of damage ​to the equipment if the user makes a wrong loopHowever, ​it does not guarantee that the device ​can not be disabled in principleWe also note that user does not require ​special ​skills ​and tools to make and modify loops.+<note tip> 
 +**//The current ​connector ​pinout ​(designations ​of individual pins) minimizes the likelihood ​of damage ​of the equipment if the user fails to terminate the ribbon cable correctlyNevertheless ​it provides no guarantee that the device ​cannot ​be damaged at allIt should ​also be noted that ribbon cables can be made and tailored by the user without any need for special ​knowledge ​and tools
 +All devices in the network can be connected both in series using point-to-point cables (as shown in the figure below) or branched using ribbon cables with more than two connectors.//​** 
 +<note important>​ 
 +**//The male-male camera cable may not be longer than 40 cm.//** 
 +<note warning>​ 
 +**//Never mix orbiter devices with devices not designed for “orbital” operation (the “terrestrial” HF receiver ​and the “terrestrial” VHF/UHF receiver) in the same cable circuitTake special care to avoid mixing the USB-RS485 surface segment cable and the orbiter power system (OPS) in the same cable network. Failure to do so may result in damage to components of the construction set.//** 
-**Important notes** \\  +**Ribbon Cable Test**
-It should be noted that despite its simplicity, the crimped connector on the cable requires accuracy. Before applying the clamping force, it is necessary to press the latch lightly in order to make sure that the conductors of the loop fall exactly between the contacts and only then finally snap the connector.+
-**//Correct crimping //** +  ​Connect the ribbon cable tester to the 220 VAC mains using a 12 VDC adapter from the set; 
-{{ ru:​clipping2.jpg?​direct&​200 |}}+  ​Insert the assembled ribbon cable into the respective receptacles of the cable tester. The “OK” green LED will light up.
-**//​Incorrect crimping //** 
-{{ ru:​clipping1.jpg?​direct&​200 |}} 
-It is forbidden to connect devices that are not intended to be used "​on-board"​ ("​terrestrial"​ HF receiver and "​terrestrial"​ telemetry receiver) with the on-board network equipment into one cable network. It is especially important to ensure that one cable network does not have a USB-RS485 ground segment connection cable and an on-board power supply system. Otherwise, the components of the construction set may be damaged.+<note important>​ 
 +**//If the “Open Circuit” yellow LED remains lit, there is a discontinuity in the circuit. Poorly crimped ribbon ​cable is the most likely reason.//** 
-The cable with two male connectors ​that is used for connecting a camera should not be longer than 40 cmMore information can be found in the article about [[camera_subsys|the camera]]+<note important>​ 
 +**//If the “Short Circuit” red LED lights up, this may be caused either by punctured insulation of two adjacent channels during ​cable crimping or by improper orientation of two connectors ​against each otherTry to crimp the cable again following instructions above.//​** 
en/wiring.1539161927.txt.gz · Last modified: 2020/03/25 16:29 (external edit)