Parker CM0504, Руководство пользователя

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CM0504 User Guide
12
Internal to product
Sensor Power
Resistive Sensor
Pull-up
Resistor
Active Sensor
Analog Input
Analog Input
Figure 4.2. Analog input ground shift connection for sensors that have dedicated ground wires
4.2. Power control digital input
The•CM0504•has•1•active-high•power•control•digital•input•that•is•used•for•waking•up•(turning•on)•the•
product•(
INPUT1
).
This•type•of•input•has•a•pull-down•resistor•option•only.•When•the•input•is•active•it•turns•on•the•power•
supply•pass•transistor•to•power•up•the•unit.•The•input•is•sensed•directly•by•the•microprocessor.
4.2.1. Power control input, circuit characteristics
The•following•table•provides•specifications•for•the•CM0504•power•control•digital•input:
Power control digital input characteristics
Item MIN NOM MAX UNIT
Input voltage range 0 32 V
Over-voltage 36 V
Pull-down resistance 21.2 kΩ
Capacitance at pin 1000 pF
Input Power Up Threshold 2.5 4.3 V
•
Note: The•power•control•digital•input•voltage•must•be•greater•than•4.3•V•before•it•is•considered•an•active•
high•input.
The•power•control•digital•input•wakes•up•the•CM0504•when•switched•high•to•a•voltage•of•4.3•V•or•greater.•
The•CM0504•will•shut•off•when•an•open•circuit•condition•occurs•on•the•power•control•digital•input,•
unless•it•is•configured•to•‘Wake•on•CAN’.