3 Wiring and Connections
33 SD780 Series Servo Technical Manual
B
A
1
2
3
4
5
6
7
8
9
Signal definition
A pin number B pin number
Encoder power +5V
Encoder power 0V
Serial data SD+
Serial data SD-
PE(Shielding layer)
1
2
5
6
1
2
5
6
Iron shell
7
Pin definition
Absolute encoder battery BAT+
3
3
Absolute encoder battery BAT-
4
4
1
3
5
2
4
6
Note:
1. When welding the encoder, please pay attention to the definition of A-end and B-end pins (as
shown in the table above). The encoder wire uses twisted pair shielded wire, and the shielding
layers at both ends of the wire should be grounded.
2. When using the multi-turn absolute encoder, please pay attention to the positive and negative
electrodes of the battery. It is recommended to use the lithium battery with rated voltage of 3.6V
and rated capacity of 2.7AH.
3.4 CN7 USD communication terminal (connect to host machine)
Note: ordinary Android cable with data transmission function can also be used
Pin No.
Name
Function
1
VBUS
External power 5V
2
D-
Data-
3
D+
Data+
4
-
None
5
GND
Signal ground