User's Manual l MBLS1028A UM 0100 l © 2020, TQ-Systems GmbH
Page 16
4.3.4
CAN
Two ISO-11898 compliant CAN interfaces are provided on the MBLS1028A.
The signals are each connected to a 3-pin connector.
The interfaces are galvanically isolated, but not among each other.
The High-Speed Mode supports data rates of up to 5 Mbit/s.
Figure 15: Block diagram CAN
The following table shows the pinout of the CAN connectors.
Table 11:
Pinout CAN, X17, X29
CAN bus / connector
Pin
Signal
Direction
Remark
CAN1 / X17
CAN2 / X29
1
CAN_H
I/O
Galvanically separated
2
CAN_L
I/O
3
GND_CAN
P
The CAN signals can be terminated with 120 Ω using the DIP switches S1-1 & S1-2
Table 12:
CAN termination, DIP switch S1
DIP switch
Interface
ON
OFF
S1-1
CAN1
CAN1 terminated with 120 Ω
CAN1 not terminated
S1-2
CAN2
CAN2 terminated with 120 Ω
CAN2 not terminated
All other combinations of S11 (e.g., S11-1 ON & S11-2 OFF) are not permitted.