CM0504 User Guide
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6. Power
The•CM0504•is•powered•by•the•vehicle•battery.•The•CM0504•operates•in•a•12•V•or•24•V•system,•and•can•
operate•from•9•V•up•to•32•V,•with•over-voltage•protection•at•36•V.
When•the•CM0504•is•configured•to•go•into•sleep•mode,•the•controller•is•turned•on•by•applying•power•to•
the•power•control•(wake-up)•input•or•a•CAN•message.
6.1. Logic and output power
The•CM0504•has•2•pins,•labeled•VBATT,•dedicated•to•providing•power•for•logic•and•outputs,•and•2•pins,•
labeled•GND,•dedicated•to•grounding•the•CM0504.
Note:
The•power•and•ground•connections•are•usually•paralleled•over•several•pins•to•minimize•voltage•
drops•on•higher•current•applications.
6.1.1.
Logic and output power capabilities
The•VBATT•pins•that•provide•logic•and•output•power•are•internally•connected•inside•the•CM0504.•
Logic•power•refers•to•the•logic•circuit,•which•consists•of•the•microprocessor,•RAM,•etc.•The•logic•circuit•
can•draw•a•maximum•of•250•mA.
Output•power•refers•to•the•output•circuits•connected•to•the•battery•positive•and•ground•terminals.•Each•
output•circuit•can•draw•a•maximum•of•25•A.
The•following•table•provides•specifications•for•the•CM0504•logic•and•output•power:
Logic and Output Power Specifications
Item
Min
Nom
Max
Unit
Input voltage range
9
32
V
Over voltage
36
V
Current draw in on state (excluding outputs)
250
mA
Current draw in sleep mode
(see note 1)
0.6
1.7
mA
Inline fuse required on power circuit pin
130
A
Number of VBATT pins
2
-
Number of ground pins
2
-
Note 1:
Current•draw•in•sleep•mode•depends•on•the•output•configuration.•Sleep•mode•current•draw•will•
be•lesser•value•when•the•outputs•are•configured•as•HS•output.
6.1.2.
Logic and output power connections
When•connecting•the•CM0504•logic•and•output•power,•note•that:
•
•
Logic•and•output•power•connections•are•made•using•the•VBATT•and•GND•pins.•
•
•
When•there•are•multiple•output•power•pins,•the•number•of•wires•needed•to•connect•the•CM0504•
power•depends•on•the•amount•of•current•required•by•the•application.•
•
•
It•is•recommended•that•you•use•the•largest•AWG•wire•allowed•by•your•connector•for•the•VBATT•
and•GND•pins,•to•meet•the•amount•of•expected•output•current;•however,•this•is•not•always•true•
and•depends•on•your•application.