Allen-Bradley 23PFC, Руководство по обслуживанию оборудования

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Rockwell Automation Publication 23PFC-TG001A-EN-P - March 2018 101
Frame B Field Controller Part Replacement Procedures Chapter 4
AC Line Snubber Circuit Board
and Resistors Replacement Remove the AC Line Snubber Circuit Board and Resistors
1. Read the General Safety Precautions on page 10 .
2. Remove power from the device (see page 79 ).
3. Remove the protective covers from the device (see page 80 ).
4. Remove the pulse transformer and switching power supply boards from
the device (see page 93 ). You do not need to remove the switching power
supply board from the back of the pulse transformer board for this
procedure.
5. Remove the two screws and washers that secure the (red and blue) wires
from the AC line snubber board to the bus bars and remove the wires.
6. Remove the three screws and washers that secure the (black) wires from
the resistors to the bus bars and remove the wires.
IMPORTANT Mark all connections and wires before removal to avoid incorrect
wiring during reassembly.
5 and 6
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