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CM2115
Communication
The only type of communication available to the CM2115 is Controller Area
Network (CAN) communication.
9.1. Controller area network
The CM2115 has 2 Controller Area Network (CAN) communication port(s)
available. The CM2115 hardware provides controller area network (CAN)
communication according to the SAE J1939 specification, making the CM2115
compatible with any CAN-based protocol through software.
CAN communication is used to communicate the status of multiple modules that
are connected together in the same network.
9.1.1. J1939 CAN Capabilities
The CAN communicates information at a rate of 250 kbps. CM2115 input and
output information is transmitted through the CAN at a broadcast rate of 40 Hz.
Lack of regular CAN communication is an indication that there is either a
problem with a module in the network, or a problem with the CAN bus.
The following table provides specifications for the CAN:
Item
Min
Nom
Max
Unit
Max voltage
-
-
32
V
Onboard terminator option
-
No
-
Wake on CAN option
-
No
-
Baud rate
-
250
-
kbps
J1939 compliant
-
Yes
-
9.1.2. J1939 CAN Installation Connections
The CAN connection for the CM2115 should conform to the J1939 standard.
For a list of J1939 connection considerations, refer to the SAE J1939
specifications available through the Society for Automotive Engineers. SAE
9. Communication
