Rockwell Automation 23P PowerFlex DC Stand-Alone Regulator (SAR) In-Rush Limiting Resistor - Manual (Page 7)

Rockwell Automation Publication 23P-IN008A-EN-P - June 2011 7
Step 5: Remove the
In-Rush Limiting
Resistor
1. Remove the mounting screws (4).
2. Cut the wire at each soldered terminal directly behind the terminal. Leave as much
wire as possible for reassembly.
3. Dispose of the in-rush limiting resistor properly.
Step 6: Install the
New In-Rush
Limiting Resistor
and Reassemble the
SAR 1. Strip about 5 mm (0.2 in.) from the end of the 1.3 mm 2
(16 AWG) wire insulation.
2. Solder the wires to the new in-rush limiting resistor wire terminals.
3. Mount the new in-rush limiting resistor to the heatsink.
4. Install the power interface circuit board and switching power supply circuit board in
reverse order of removal. See Remove the Power Interface Circuit Board and
Switching Power Supply Circuit Board on page 5 .
5. Install the control circuit board in reverse order of removal. See
Remove the Control
Circuit Board on page 4 .
Soldered Terminals (2).
Cut the wire directly
behind the terminal.
Mounting Screws (4).
Tightening torque:
2.5…4 N•m (22…35.4 lb•in)
In-rush Limiting
Resistor (1)
IMPORTANT Thermal grease must be applied to the bottom of the in-rush limiting
resistor before securing it to the heatsink. Clean the surface of the
heatsink and the new in-rush limiting resistor with isopropyl alcohol,
then apply a thin coat of thermal grease to the in-rush limiting resistor.