Robotis Dynamixel DX-117 - Manual (Page 8)

7
DYNAMIXEL DX-Series
The direction of data signals on the TTL level TxD and RxD depends on the
DIRECTION485 level as the following.
• When the DIRECTION485 level is High: the TxD signal is outputted as D+, D-
• When the DIRECTION485 level is Low: the D+, D- signal is inputted to RxD
RS485 The communication protocol used by the Dynamixel actuator, RS485 (IEEE485), uses
the multi-drop method of connecting multiple terminals on a single node. Thus a protocol
that does not allow multiple transmissions at the same time should be maintained on a
RS485 network.
Note Please ensure that the pin assignments are correct when connecting the Dynamixel
actuators. Check the current consumption after the wiring is completed. The current
consumption of a single Dynamixel actuator unit in standby mode should be no larger
than 50mA.
Connection Status Verification
When power is applied to the Dynamixel actuator, the LED blinks twice to confirm its
connection.
Inspection If the above operation was not successful, check the connector pin assignment and the
voltage/current limit of the power supply.
Main
Controller
[RS485 Multi Drop Link]