Chapter 2 WiringDD Series

Wiring/Terminals Setting

Used with internal power (+24Vdc)

MI1

MI2

~

MI5

COM

+24V

COM

CAUTION!

Used with external power

MI1

 

MI2

 

~

 

MI5

 

+

+24V

COM

External +24V power

;The wiring of main circuit and control circuit should be separated to prevent erroneous actions.

;Please use shield wire for the control wiring and not to expose the peeled-off net in front of the terminal.

;Please use the shield wire or tube for the power wiring and ground the two ends of the shield wire or tube.

;Damaged insulation of wiring may cause personal injury or damage to circuits/equipment if it comes in contact with high voltage.

;The AC motor drive, motor and wiring may cause interference. To prevent the equipment damage, please take care of the erroneous actions of the surrounding sensors and the equipment.

;When the AC drive output terminals U/T1, V/T2, and W/T3 are connected to the motor terminals U/T1, V/T2, and W/T3, respectively. To permanently reverse the direction of motor rotation, switch over any of the two motor leads.

;With long motor cables, high capacitive switching current peaks can cause over-current, high leakage current or lower current readout accuracy. For usage of long motor cables use an AC output reactor.

;The AC motor drive, electric welding machine and the greater horsepower motor should be grounded separately.

;Use ground leads that comply with local regulations and keep them as short as possible.

;No braking resistor is built in the VFD-DD series, it can install braking resistor for those occasions that use higher load inertia or frequent start/stop. Refer to Appendix B for details.

;Multiple VFD-DD units can be installed in one location. All the units should be grounded directly to a common ground terminal, as shown in the figure below. Ensure there are no ground loops.

;The wiring of main circuit and control circuit should be separated to prevent

erroneous actions.

; Please use shield wire for the control wiring and not to expose the peeled-off net in front of the terminal.

;Please use the shield wire or tube for the power wiring and ground the two ends of the shield wire or tube.

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3Com VFD-D D manual Wiring/Terminals Setting

VFD-D D specifications

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