CM2904 Instruction Book © 2009 - 2022 Parker-Hannifin Corporation Page 39 of 51
Application Examples
Controlling Indicator Lights
9. Application Examples
The purpose of this section is to provide examples of how the CM2904 can be used
for different purposes. The following examples are covered in this section:
•
Controlling indicator lights
•
Controlling actuators
•
Connecting push-buttons
•
Connecting sensors
•
Connecting rotary encoder (pulse wheel)
I
NFORMATION
These examples are for illustrative purposes only.
N
OTICE
As the CM2904 is mainly intended for
IO-extension
, it assumes to get the
commands for performing the operations from the master module via CAN -bus.
CM2904 also sends the measurement data through CAN –bus to master unit in pre-
defined interval.
9.1. Controlling Indicator Lights
Multiple CM2904 can be used together in a system to control a vehicle's indicator
lights.
The CM2904s would communicate over CAN, and be connected and wired to the
rear indicator lights, front indicator lights, turn signal and hazard switches etc. Just
to give an idea of what CM2904 could be utilized.
N
OTICE
The CM2904 outputs has pull-up resistors for diagnostic purposes. This needs to be
taken into account in application as the pull-up would mean small current to output,
which may cause for example sensitive LED indicators to glow if connected directly
to CM2904 output without pre-resistors.
You shall consider this when building your application and making connections to
output devices for CM2904.
