Cables
Table of Contents
Comms cables
Communications from and to servos are transmitted as a differential signal over twisted pairs of wires. These cables have the following specs:
- Connectors: female JST PH-3 (3-pin JST connectors with 2.0 mm (PH) pin-to-pin pitch)
- Wire gauge: 26 AWG (24 AWG to 32 AWG should work)
- Wire length: 42 cm
- Tip: order PVC rather than Silicon wires (they are easier to twist)
Comms cable have female-female connectors, that is, female connectors on both sides. Pins inside are ordered as follows, when looking at the back of the connector (from the cable to the connector):
- Left:
CAN_H(typically blue) - Center:
CAN_L(typically green) - Right:
GND(typically black) ⚠️ we leave this one empty
See also the JST PH-3 CAN section in the power-dist board reference.
Power cables
The power bus is obtained by daisy-chaining bigger cables through servos and electronics to the battery. These cables don't need to be twisted.
- Connectors: XT-30
- Wire gauge: 14 AWG (16 AWG works too)
We have two types of power cables, as depicted in the pictures to the right:
- Power cables between actuators:
- Connectors: female-female
- Wire length: 42 cm
- Power cables to the power dist board:
- Connectors: female-male
- Wire length: 20 cm
Ask questions about these cables in Hardware discussions.
