CM0504 User Guide
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The•following•shows•how•to•connect•the•CM0504•to•control•the•speed•of•a•motor:
•
Internal to product
Motor
Frequency Input
High-Side Output
(PWM)
Battery Voltage
Figure 10.4. Connection for controlling motor speed
10.5.
Connecting Various Sensors
There•are•many•types•of•sensors•that•can•be•connected•to•the•CM0504,•as•follows:
•
•
Open•collector•sensors
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•
Variable•resistance•sensors
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•
Variable•reluctance•sensors
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•
Switch•sensors
•
•
Voltage•sensors
•
•
CMOS•sensors
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Potentiometer•(ratiometric)•sensors
Note 1:
•To•optimize•the•reading•accuracy•for•sensors,•dedicate•one•of•the•main•ground•pins•(called•GND)•
as•a•low-current•ground•return•for•all•sensors•on•the•vehicle.
Note 2:
When•connecting•sensors•to•the•CM0504,•use•the•sensor’s•specification•to•ensure•that•the•
CM0504•is•configured•correctly•for•the•sensor.
10.5.1. Open Collector
Open•collector•sensors•are•compatible•with•each•type•of•input•on•the•CM0504.
Open•collector•sensors•are•typically•used•in•applications•that•require•digital•or•frequency•measurements.•
They•work•by•pulling•voltage•down•to•ground•or•up•to•power•when•activated,•and•are•basically•a•switch•
that•turns•on•and•off.•
Note:
Open•collector•sensors•need•a•pull-up•or•pull-down•resistor•to•bias•the•state•of•the•sensor•when•the•
sensor•is•not•activated.•Pull-up•and•pull-down•resistors•are•internal•to•the•CM0504.