User`s manual

4 - 6
4
4-3 Connecting (wiring) to external devices
[1] to [8] show the wiring between this module and external equipment. Pay attention to the following
points during wiring.
Noise from power lines in the periphery or external loads sometimes cause electronic control devices
to malfunction (e.g. positional shift). Adopt the following countermeasures to eliminate malfunction
caused by noise and improve system reliability.
1. Use power leads and cables specified in the instruction manual for the motor driver made of lead
materials for use in wiring.
2. Wire with the power line (AC power supply, motor power leads) separated from the control line
(pulse output line, external I/O signals leads).
3. Use a shielded lead with outer jacket for the control line.
4. Connect the shielded lead to the frame ground (FG) on the driver side.
5. Use a class III grounding, and use thick cable lead material of at least 1.25 mm
2
in cross-sectional
area.
6. Use of twisted pair cable is recommended for the power line.
7. Be sure to install a surge absorber to inductive loads (relays, solenoids).
8. When an inductive load is connected to input signals, connect a diode as follows near to the load to
absorb noise.
IN
COM
This module
Diode :
Use a diode having a peak total reverse
voltage (VRM) of 3 times the load voltage
or more, and a mean rectifying current of
the load current or more.
Load