3. Installation and Wiring
3-18
3.4.4 Wiring the control circuit terminal
① Shield wire or vinyl insulated wire are highly recommended to be used for the control circuit terminal.
② Be sure to use twisted shield wire if wiring distance gets too long.
③ Wire should be at least as thick as 0.2 ~ 0.8 mm
2
(18 ~ 26 AWG).
④ Screwing torque limit should be kept under 5.2 lb-in.
⑤ Maximum interrupting capacity of auxiliary contact 1, 2 and 3 is of AC 250V/1A, DC 30V/1A.
⑥ Maximum interrupting capacity of fault alarm relay A, B contact is of AC 250V/1A, DC 30V/1A.
⑦ Open collector output 1, 2 and 3 and encoder output can be used below maximum of 24V/100mA.
⑧ Wires for the control circuit terminal should be separated from ones for the power circuit terminal, if possible
and in case wires for both control circuit terminal and the power circuit one cross each other, they should be
crossed at right angles (90°).
3.4.5
Caution on wiring pulse encoder
1) Check-up of the coupling and alignment of motor shaft and encoder shaft
① Be sure to mount the pulse encoder at the location where it rotates with same speed as the motor does.
(e.g. on the opposite shaft of load side of motor, on the opposite shaft of motor at traction machine)
② In case there is speed slip between the motor shaft and encoder shaft, the motor may not start or it causes
mechanical vibration.
③ Poor alignment of motor and encoder shaft results in torque ripple and causes mechanical vibration which has
the same frequency as the motor speed at the constant speed region.
2)
Wiring the pulse encoder
① Be sure to use twist paired shield wire and ground shield wire to screw for earth on the I/O PCB.
② Signal wires should be separated from the power lines, if possible. Electromagnetic noise may affect the pulse
encoder output signals.
Min. distance: 10cm
Min. distance: 10cm
Wires for Main Circuit
Wires for Control Circuit
To Next Page
Loading...
