Electronic Overview - Smart Stop Pcb - LifeFitness 9100 Service Manual

Life Fitness Models 9100, 9500HR, 9700HR, and 9700HR w/Decline Treadmills
ELECTRONIC OVERVIEW – SMART STOP PCB
Functional Description
The Smart Stop PCB, is designed to sense the presence
of a user on the treadmill deck. Infrared light is transmitted
twice a second. It is reflected by the user and then is
detected by the receiver module. The treadmill console
controls the Enable pulse and reads the output of the
receiver module.
Connector and Pin Functions
Connector
P1 is a 4 pin connector that
connects to the Display PCB
Location Pin Functional Description
1 Ground
2
+8Vdc
3 /Enable Input Active
4
U_Detect Output Pulsed Active Low
P1
11