Hardware Interfaces; Can Communication Interface; Connector Definition; Terminal Resistance - ZLG MiniPCIeCANFD Manual

MiniPCIeCANFD
PCIe interface CAN (FD) card

2. Hardware Interfaces

2.1 CAN Communication Interface

MiniPCIeCANFD uses a 1.25-3P connector. The signal definition converted to DB9 interface pins through the
attached PACK interface board meets the requirements of the CiA standard. The signal definition is detailed in
Table 2.1.
2.2 DB-9 Connector Definition
Pin Signal
1 NC
2 CAN_L
3 CAN_GND
4 NC
5 CAN_SHIELD
6 CAN_GND
7 CAN_H
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.
Pin Signal
1 V-
2 CAN_L
3 CAN_SHIELD
4 CAN_H
5 V+

2.3 Terminal Resistance

As shown in Figure 2.3, the PACK interface board attached to the MiniPCIeCANFD interface card has a
built-in 120 ohm terminal resistor.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 delivery, 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. Set the DIP switch of
the corresponding channel to "ON", or connect a 120 ohm terminal resistance between CAN_H and CAN_L of the
corresponding CAN channel.
Table 2.1 DB-9 pin connector pin definition
Description
——
CAN_L signal cable
Reference ground
——
Shielded wire
Reference ground
CAN_H signal cable
——
——
Table 2.2 Pin definition of OPEN5 socket
Description
Network power supply negative
CAN_L signal cable
Shielded wire
CAN_H signal cable
Network power supply positive
5
Interface Diagram
1
6
2
7
3
8
4
9
5
Interface Diagram
2022
© Guangzhou ZHIYUAN Electronics Co., Ltd.
User Manual