1.3.3 Pulse interfaces
z
The differential input connection is recommended for a correct transfer.
z
The RS422 driver(e.g AM26LS31、MC3487) is used to make the differential connection.
z
The action frequency will be fall down under a single connection. Base on the input circuit,
the driver current is in the range of 10~15mA , the maximum voltage of external DC power
supply is 25V, the R value will be got, Experience data:VCC=24V, R=1.3~2k; VCC=12V,
R=510~820Ω; VCC=5V, R=82~120Ω.
z Under the single connection, inverting the polarity of DC power source, which is provided by the
user, can cause the servo driver damage.
z The input mode、timing and parameters of the pulse are shown below, the arrow indicates the
counting edge. When use the mode of A、B phase, the maximum of the four times the frequency
is 500kHz.
Input pulse mode
5
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