127Service Manual – SC6000 40 - Recovery System
Vacuum Motor Control Circuit Overview
Power to the vacuum motor is controlled by the power module, which is commanded by the main controller.
When the machine is enabled for operation, the power module activates the K2 power relay, that provides
positive battery power to the vacuum motor, and other devices. To activate the vacuum motor, the power
module uses PWM control to complete the battery circuit through the motor to ground.
The power module monitors the performance and health of the vacuum motor, and reports this information
back to the main controller via the CAN Bus. The power module will detect open circuits, short circuits, and
motor overloads.
B-
J3-14
B+
J3-13
E3
POWER MODULE
OPTION
KSI
J3-2
J3-9
PWM
(I) TO 1B5
TO 2C5
PWM
TO 2B2
BLK
BLK
TAN/BRN
BLK/GRA
GRA/RED
ORN/BLU
RED
BLU/RED
BLU/GRA
BRN
RED
BLU/GRA
BLU/RED
BLU/RED
BLU/GRA
B+
B-
B+ B-
KSI
B-
K2
POWER MODULE
2 1
M
M4
MOTOR, VACUUM 1
1
2
B-
B+
B-
B-
K2
COIL, POWER MODULE
3
4
M
M5
MOTOR, VACUUM 2
12
M
M6
SQUEEGEE ACTUATOR
- +
B+
B-
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