80 of 132
M-SV-001-EN Rev.E
Compressor Components
3.16.2 Connections
J1 on the Backplane is the PWM connection port.
See Figure 75 (Bearing Power Feed Throughs and
PWM Connection Port).
The PWM heat sink is secured with fasteners to
the compressor housing below the Backplane.
There are different housings for the Turbocor
compressors. The Major Revision “E” and earlier
compressors utilize feed throughs with external
male pins while the Major Revision “F” and
later compressors utilize feed throughs with
integrated external pigtails. Figure 75 (Bearing
Power Feed Throughs and PWM Connection Port)
identifies those differences.
The 6-pin/wire connects to the rear (left) bearing
power feed through.
The 4-pin/wire connects to the front (right)
bearing power feed through. See Figure 75
(Bearing Power Feed Throughs and PWM
Connection Port) and Figure 76 (Bearing Pulse
Width Modulator Amplifier).
Figure 75 - Bearing
Power Feed Throughs
and PWM Connection
Port
Figure 76 - Bearing PWM Amplifier
J1: PWM Connection
Major Revision “E” and Earlier
Major Revision “F” and Later
Major Revision “F” and Later
Rear Radial and Axial Bearing
Power Feed Through
Front Radial Bearing
Power Feed Through
NOTE
There are two different styles of Major Revision “E” and earlier feed throughs. Older versions have a removable black neoprene
gasket (not pictured) and this was later replaced with a non-removable red neoprene gasket.
Major Revision “E” and Earlier
Summary of Contents for Turbocor TT-300
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