Terminal Resistor - ZLG PCIe-9140I User Manual

Guangzhou ZHIYUAN Electronics Co., Ltd.
Pin
1 NC
2 CAN_L
3 CAN_GND
4 NC
5 CAN_SHIELD
6 CAN_GND
7 CAN_H
8 NC
9 NC
The signals of DB-9 connector can be transferred to the 5-pin OPEN5 connector via the
optional DB9-OPEN5 converter.
Pin Signal
V-
1
2 CAN_L
3 CAN_SHIELD
4 CAN_H
V+
5

2.3 Terminal Resistor

As Figure 2-1 shows, there are built-in 120 terminal resistors in the CAN channels of
PCIe-9140I. The interface card selects whether the corresponding terminal resistors of
CAN0, CAN1, CAN2 and CAN3 are connected to the bus network by connecting or
disconnecting JP1A, JP1B, JP1C and JP1D. Set whether the CAN channel
uses/enables 120 terminal resistor, as shown in Figure 2-2. By default, the jumper is
connected in the factory, i.e. the terminal resistor of 120 is connected to the bus
network.
The CAN channel of PCIe-9140I locates at a CAN network endpoint. Please connect
the corresponding jumper of channel, or connect a 120 terminal resistor between
CAN_H and CAN_L of CAN channel. The PCIe-9140I series device uses the
CTM8251E transceiver. If different transceiver is used by other nodes on the network,
the value of terminal resistor should be calculated again.
User Manual
Date: 2017/10/09
High performance CAN card for PCIe interface
C
Table 2-2: DB-9 connector pin definition
Signal Description
-
CAN_L signal wire
Reference ground
-
Shield wire
Reference ground
CAN_H signal wire
-
-
Table 2-3: OPEN5 socket pin definition
Description
Negative electrode of network
power supply
CAN_L signal wire
Shield wire
CAN_H signal wire
Positive electrode of network
power supply
4
PCIe-9140I User Manual
Port Schematic Diagram
Port Schematic Diagram
©2017 Guangzhou ZHIYUAN Electronics
V1.00