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Rockwell Automation Publication 20Y-TG002C-EN-P - April 2017
Chapter 4
AFE Power Structure Component Section
Understand the Torque
Figures in Assembly
Diagrams
Icons and numbers in the assembly diagrams indicate how to tighten hardware.
Torque Specifications
The following table lists fastener torque specifications for the circuit boards
and main components of the Active Front End.
PZ2
4 N•m
(35 lb•in)
Tool Type and Size:
• PZ indicates Pozidriv screwdriver bit
• P indicates Phillips screwdriver bit
Tightening Torque
Fastener Type
Pozidriv
screw
Phillips screw
Hexagonal bolt or
standoff
Hexagonal
screw
Hexagonal nut
Torx head screw
Item
Hardware
Final Torque
AC input terminals
M10 nut
40 N•m (354 lb•in)
ASIC circuit board (mounting)
M4 x 8 Pozidriv screws
0.9 N•m (8 lb•in)
ASIC circuit board cover
M4 x 8 Pozidriv screws
0.9 N•m (8 lb•in)
ASIC fan
M4 x 16 Pozidriv screws
0.4 N•m (3.5 lb•in)
Capacitor
M4 x 8 self-tapping screws
1 N•m (9 lb•in)
DC-/DC+ terminals
M6 x 20 Pozidriv screws
5 N•m (44 lb•in)
DC connective bus bars
M10 x 20 hexagonal screws
8 N•m (71 lb•in)
M8 x 25 hexagonal socket-head screws
8 N•m (71 lb•in)
M6 x 12 Pozidriv screws
4 N•m (35 lb•in)
DPI/HIM assembly door
M3 x 6 Phillips screws
0.9 N•m (8 lb•in)
DPI/HIM assembly (mounting)
M3 x 6 Phillips screws
0.9 N•m (8 lb•in)
Fan inverter assembly
M5 x 10 Pozidriv screws
4 N•m (35 lb•in)
Fan inverter fuse base
M4 x 8 Pozidriv screws
3 N•m (27 lb•in)
Fan inverter fuse holder
M4 x 8 Pozidriv screws
3 N•m (27 lb•in)
Gate driver circuit board (mounting)
M4 x 8 Pozidriv screws
1.35 N•m (12 lb•in)
Main cooling fan (mounting)
M5 x 10 Pozidriv screws
3 N•m (27 lb•in)
Precharge bridge assembly
Wire fasteners
M5 x 12 machine screws
4.5 N•m (40 lb•in)
Mounting
M5 nuts
3.9 N•m (35 lb•in)
Precharge bridge resistor assembly
M5 x 12 Torx self-tapping screws
4.5 N•m (40 lb•in)
LCL filter upper
front bracket
In IP20 enclosure
M8 x 20
M6 x 16 screws
6.7 N•m (60 lb•in)
4.5 N•m (40 lb•in)
In IP21 enclosure
M5 x 12 Torx self-tapping screws
4.5 N•m (40 lb•in)