RDC6585G Control System Manual V1.0
SHENZHEN RUIDA TECHNOLOGY
25
6.1 Brief
The input signal end of step-servo motor driver employs the light-coupled isolation
technology. For the step-by-step impulse signal, some isolate the side OC diode from
cutoff to conduction (e.g. the valid falling edge of pulse signal inputted from the diode
minus end) and some do so from conduction to cutoff (e.g. the valid rising edge of pulse
signal inputted from the diode minus end).
When it is indicated whether the pulse signal of motor driver is the valid rising edge
or the valid falling edge, it will be subject to the pulse signal inputted from the
minus end of side OC diode.
Some input signals of motor driver are independent and some are internally of common
anode, so some have 4 external leading-out wires and some 3 wires (only the pulse and
directional signals are counted) as shown in Figure 6.1-1 and 6.1-2.
RDC6585G Controller has eight groups of 3-wires motion driver interface, each interface
has one direction signal, one pulse signal, and one 5V positive output, the direction signal
and the pulse signal are all OC output.
RDC6585G controller must be common anode with the motor driver. The polarity of
the direction signal can be changed in the factory parameters, and the valid edge of
the pulse signal can also be changed.
Figure: 6.1-1 Four Inputs, Independent
Input Signal of Driver
Figure: 6.1-2 Three Inputs, Common-anode
Input Signal of Driver
