CAN Control
© 2019 EMP, Inc.
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External addressing is provided to reduce part number count in situations where more than one identical
component is in use on a CAN bus. External addressing is most effective at reducing part number count when
all of the following conditions exist:
•
More than one controller
•
Identical hardware (same voltage, pressure/flow rating, orientation, etc.)
•
Each controller has an identical calibration (default speed, command/status messages, etc.)
NOTE:
If all of the listed conditions are not met, EMP recommends leaving the address pins open.
External address resistance is measured across the address input pins (Reference the example CAN application
schematics). An address resistor harness, part number 1370002349, and matching precision address resistors,
are available for purchase from EMP.
EMP recommends calibrations for applications requiring 3 or less addresses assign each address to a band of
resistance values, to increase the robustness of the addressing. Using high precision resistors will also increase
the robustness of addressing.
The primary address is typically printed on the component label. This is the address assigned when the external
resistance reads as ‘Open’.
EMP Recommended Resistor Addressing Schemes
NOTE:
Contact EMP for assistance if placing more than 3 pumps on one CAN bus.
Resistance (ohms)
Address
Open
Factory Configured
Resistance (ohms)
Address
Short
2
nd
address
Open
Primary
Resistance (ohms)
Address
Short
2
nd
address
6.65K-10.0K
3
rd
address
Open
Primary
