Omnitracs MCP110 - Option 2-Connecting J1939 Without Using the Repeater Cable

Option 2—Connecting J1939 Without Using the Repeater Cable Vehicle Data Bus Connections
9-8 80-JB400-1 Rev. D
MAY CONTAIN U.S. AND INTERNATIONAL EXPORT CONTROLLED INFORMATION
Option 2—Connecting J1939 Without Using the Repeater Cable
Use the direct connection method (no repeater cable) when the distance between the
MAS110 and the J1939 bus connection point does not exceed 10 feet. Typically, this option
can be used if a special OEM accessory cable is supplied that has a distance of less than 10
feet.
Connect the MCP110 accessory cable to the OEM-supplied stub connector only.
In order for the MCP110 to receive J1939 data, the MAS110 CAN/J1939 wires must be
connected to the truck’s J1939 CAN bus in the vehicle.
Follow all SAE guidelines when connecting to the J1939 data source.
Note
If you are doing an installation on an OEM prewired truck with a CAN MCP110 accessory
cable and a repeater cable is not included as part of the prewire, go to Option 1—Connecting
J1939 Using the Repeater Cable on page 9-5.
CAN_HCAN_L
Termination Resistors
at the far ENDS
of the Main Backbone
Each120 Ohms 5% 1/4W
09AAA_036
OEM
CONNECTOR
TRUCK ECM
Most US ECMs are
hi impedance (Z)
and not internally terminated
Mobile Application Server
(MAS110)
Accessory
Cable
Stub
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