Rockwell-automation DC3E Non-Regenerative DC Drive User Guide 1/4 - 2 Manual de usuario descargar pdf (Pagina 71)

63Application Notes

ATTENTION: The DC3 Drive is intended to operate

at a predetermined minimum speed. If the application

requires zero speed operation, the user is responsible for

assuring safe conditions for operating personnel by

providing suitable guards, audio or visual alarms, or

other devices. Failure to observe these precautions

could result in bodily injury.



Reversing

A dynamic brake may be used when reversing the motor

direction (Figure 17, page 64). Use a three-pole, three-

position switch rated for at least the maximum DC

armature voltage and maximum braking current. Wait for

the motor to stop completely before switching it to either

the forward or reverse direction. See the Dynamic Braking

section on page 43 for sizing the dynamic brake resistor.

250-0287-rev2.qxd 3/12/01 10:27 AM Page 63

1 2 ... 66 67 68 69 70 71 72 73 74 75 76 ... 91 92

Sin comentarios

Rockwell-automation DC3E Non-Regenerative DC Drive User Guide 1/4 - 2 Manual de usuario Pagina 71