This page contains the documentation pertaining to manufacturing and stocking of UAVCAN UCANPHY cables and related accessories. For the background information, please refer to the UAVCAN Hardware Design Recommendations.
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UCANPHY Micro patch cable
A twisted-pair cable with standard UAVCAN UCANPHY Micro plugs (JST GH, 4 circuits) on both ends.
The following table documents the pinout of UAVCAN of UCANPHY Micro patch cable.
| Function | Side A pin number | Wires | Side B pin number |
|---|---|---|---|
| Bus power | 1 | Flat or twisted with Ground | 1 |
| CAN High | 2 | Twisted with CAN Low | 2 |
| CAN Low | 3 | Twisted with CAN High | 3 |
| Ground | 4 | Flat or twisted with Bus power | 4 |
Manufacturing instructions
Parts needed
| Part Name | Manufacturer | Part Number | Quantity |
|---|---|---|---|
| JST GH plug housing, 4 circuits | JST | GHR-04V-S | 2 |
| JST GH crimp terminal | JST | SSHL-002T-P0.2 | 8 |
| Twisted pair cable (see requirements below) | Not specified | Not specified | N/A |
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- Type: two twisted pairs, or one twisted pair plus one straight pair.
- Twisting pitch: 0.3–1 twists per centimeter.
- Wire gauge: #26–30 AWG.
- Wire strands: 7 or more.
- Wire insulation outer diameter: 0.8 to 1 mm.
- Conductor material: copper.
Optional tools
| Part Name | Manufacturer | Part Number | Notes |
|---|---|---|---|
| JST GH hand crimping tool | JST | YRS-1590 | Can be purchased from DigiKey (and other suppliers as well). |
Manual assembly instructions
Wire strip requirements:
- Outer insulation strip length (if any): 10 to 20 mm.
- Wire insulation strip length: 1.5 mm.
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- Cut the cable.
- Strip the insulation on both ends of the cable as described above.
- Crimp the terminals using the hand crimp tool.
- Insert the terminals into plug housings following the pinout specification above.
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UCANPHY Micro termination plug
A UAVCAN UCANPHY Micro plug with a 120 Ω resistor between the pins CAN High and CAN Low.
| Function | UAVCAN UCANPHY Micro | Resistor |
|---|---|---|
| (Not used) | 1 | |
| CAN High | 2 | Any pin |
| CAN Low | 3 | Any pin |
| (Not used) | 4 |
Manufacturing instructions
Parts needed
| Part Name | Manufacturer | Part Number | Quantity | Notes |
|---|---|---|---|---|
| JST GH plug housing, 4 circuits | JST | GHR-04V-S | 1 | |
| JST GH crimp terminal | JST | SSHL-002T-P0.2 | 2 | |
| Wire (see requirements below) | Not specified | Not specified | 2 | |
| Termination resistor, 120 Ω (see requirements below) | Vishay BC Components | MBA02040C1200FCT00 | 1 | Can be replaced with an alternative. |
| Heat shrink tube (recovered inner diameter: 0.5–0.8 mm) | TE Connectivity | PD-CAP-1/8-0 | 20–30 mm | Can be replaced with an alternative. |
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- Wire gauge: #26–30 AWG.
- Wire strands: 7 or more.
- Wire insulation outer diameter: 0.8 to 1 mm.
- Conductor material: copper.
- Length: 25±10 mm each.
Optional tools
Refer to the UAVCAN UCANPHY Micro Patch Cable assembly specification.
Manual assembly instructions
Wire strip requirements:
- Outer insulation strip length (if any): 10 to 20 mm.
- Wire insulation strip length: 1.5 mm.
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- Cut the leads of the resistor so that each lead is approximately 5 mm long.
- Solder two short wires directly to the leads of the resistor.
- Cover the resistor, its leads with the wire soldering joints, and at least 3 mm of each wire past the end of the lead with a single piece of heat shrink tube.
- If necessary, bend both leads of the resistor so that they point in the same direction.
- Apply heat to recover (shrink) the insulating heat shrink tube. This step can be performed later if necessary.
- Crimp JST GH terminals onto the free ends of both wires.
- Insert the crimped terminals (wires) into a JST GH plug according to the specified pinout.
- Using an ohmmeter ensure that the resistance between the pins 2 and 3 of the plug is within 120±10 Ω.
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UCANPHY Micro to
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UCANPHY D-Sub adapter cable
A twisted-pair adapter cable with UAVCAN with UCANPHY Micro plug (JST GH, 4 circuits) on one end and UAVCAN and UCANPHY D-Sub socket (D-Sub DE-9F) on the other end. This cable serves as an adapter between different types of UAVCAN of UCANPHY connectors.
| Function | UAVCAN UCANPHY Micro pin number | Wire | D-Sub DE-9F pin number |
|---|---|---|---|
| Bus power | 1 | Flat or twisted with Ground | 9 |
| CAN High | 2 | Twisted with CAN Low | 7 |
| CAN Low | 3 | Twisted with CAN High | 2 |
| Ground | 4 | Flat or twisted with Bus power | 6 |
Cable requirements: same as for the UAVCAN the UCANPHY Micro patch cable.