ZLG M.2CANFD, User Manual

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M.2CANFD
M.2 Interface CAN (FD) Card
©2022 Guangzhou ZLG Electronics Co., Ltd.
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User Manual
2.
Hardware Interfaces
2.1
CAN Communication Interface
M.2CANFD uses a 1.25-3P connector. The signal definitions converted to DB9
interface pins through the attached PACK interface board meet the requirements of the CiA
standard. Table 2.1 lists the signal definitions.
2.2
DB-9 Connector Definition
Table 2.1 Pin definition of DB-9 pin connector
Pin Signal Description Interface Diagram
1 NC
——
2 CAN_L CAN_L signal cable
3 CAN_GND Reference ground
4 NC
——
5 CAN_SHIELD Shielded cable
6 CAN_GND Reference ground
7 CAN_H CAN_H signal cable
8 NC
——
9 NC
——
The signal from the DB-9 connector can be transferred to the 5-pin OPEN5 connector
through the optional DB9-OPEN5 converter.
Table 2.2 Pin definition of OPEN5 socket
Pin Signal Description
Interface Diagram
1 V- Network power supply negative
2 CAN_L CAN_L signal cable
3 CAN_SHIELD Shielded cable
4 CAN_H CAN_H signal cable
5 V+ Network power supply positive
2.3
Terminal Resistance
As shown in Figure 2.3, the PACK interface board attached to the M.2CANFD interface
card has a built-in 120-ohm terminal resistance. Use the DIP switch S1 to select whether
the CAN channel terminal resistance is connected to the bus network. As shown in Figure
2.4, set whether the CAN channel uses the 120 ohm terminal resistance. Before delivey,
the DIP switch is set to "ON" by default, that is, the 120 ohm terminal resistance is
connected to the corresponding bus network.
The interface card corresponds to the CAN channel at the endpoint of a CAN network.
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