ICP DAS USA Network Card I 7531 User Manual

The i-7531 CAN Repeater  
Quick Start User Guide  
1. Introduction  
This user guide describes how to implement the i-7531 module into  
users’ applications in a quick and easy way. Therefore, it only provides the  
basic concepts. If users want to know more detail information about the i-  
7531, please refer to the user manual of i-7531 in the product CD or visit  
our website as follow:  
The purpose of this document is focused on helping users to quickly  
familiarize themselves with the i-7531 module. For example, users can  
apply the i-7531 module as follow figure:  
Backbone use  
Backbone of CAN bus  
i-7531  
i-7531  
i-7531  
CAN branch CAN branch  
CAN branch  
Electronic isolation  
Extended use  
i-7531  
i-7531  
Original  
CAN bus  
Extended  
CAN bus  
Extended  
CAN bus  
Electronic isolation  
i-7531 CAN Repeater Quick Start User Guide (ver. 1.3, 2008/03/25) -----1  
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3. Terminator Resistor Setting  
According to the ISO 11898 specifications, the CAN bus network must  
be terminated by one terminal resistor on each end of CAN bus for proper  
operation.  
The JP2 of i-7531 is used for adjusting terminal resistor (120) on  
CAN Port 1, and the JP3 of i-7531 is used for adjusting terminal resistor  
on CAN Port 2.  
Before setting terminal resistor (120) of i-7531, user needs to open  
the cover of i-7531 first. Those locations of JP2 and JP3 are shown as  
following figure:  
The following connection statuses present the condition if the terminal  
resistor is enabled (default) or disabled.  
Disable  
Enable  
(Deactivate)  
(Activate)  
4. Configuration Installation  
Step1: Modify JP2 and JP3 of i-7531 according to user’s application.  
Step2: Connect two different CAN buses using i-7531 as follow figure:  
i-7531 CAN Repeater Quick Start User Guide (ver. 1.3, 2008/03/25) -----3  
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CAN Port 2  
CAN_GND  
CAN_H  
Earth Ground  
CAN DEVICE  
CAN_L  
5
1
9
6
3
Power  
Power GND  
CAN Port 1  
CAN_L  
CAN_H  
+10VDC ~ +30VDC  
CAN_GND  
Earth Ground  
Note2: Roughly speaking, wiring of CAN_GND and FG can improve the  
capability of anti-interference of CAN bus system in harsh  
environment, but this is not necessary.  
Note3: When users want to calculate the total bus line length, i-7531  
need also be considered.  
According recommended specific line delay 5ns/m, one i-7531  
(~200ns delay) should be considered as one 40m bus line.  
For more information, please refer to the user manual of i-7531.  
i-7531 CAN Repeater Quick Start User Guide (ver. 1.3, 2008/03/25) -----4  
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