ICP DAS USA CAN Repeater I-7531 User manual

User Manual
Version 1.6.0 February 2018
I-7531(-UT)
(CAN Bus Isolated Repeater)
Written by Ives Shen
Edited by Kalia Huang

I-7531 & I-7531-UT (CAN Bus Isolated Repeater) User Manual Version 1.6.0 Page：2
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: [email protected]
Table of Contents
1. Introduction .........................................................................................................................4
1.1 Features..........................................................................................................................5
1.2 Specification....................................................................................................................5
1.3 Application ......................................................................................................................5
2. Technical data......................................................................................................................6
2.1 Block Diagram.................................................................................................................6
2.2 Appearance.....................................................................................................................7
2.3 Pin Assignment ...............................................................................................................8
2.4 Wire Connection ...........................................................................................................10
2.5 Status LED....................................................................................................................11
2.6 Terminator Resistor Setting...........................................................................................11
2.7 Cable Selection.............................................................................................................13
2.8 Driving Capability and Baud Rate .................................................................................13
3. Application Architecture...................................................................................................15
4. Dimension and Mounting .................................................................................................16

I-7531 & I-7531-UT (CAN Bus Isolated Repeater) User Manual Version 1.6.0 Page：3
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: [email protected]
Important Information
Warranty
All products manufactured by ICP DAS are under warranty regarding
defective materials for a period of one year, beginning from the date of
delivery to the original purchaser.
Warning
ICP DAS assumes no liability for any damage resulting from the use of this
product.ICP DAS reserves the right to change this manual at any time
without notice. The information furnished by ICP DAS is believed to be
accurate and reliable. However, no responsibility is assumed by ICP DAS
for its use, not for any infringements of patents or other rights of third parties
resulting from its use.
Copyright
Copyright @ 2016 by ICP DAS Co., Ltd. All rights are reserved.
Trademark
Names are used for identification purpose only and may be registered
trademarks of their respective companies.
Contact us
If you encounter any problems while operating this device, feel free to contact us
via mail at: [email protected] . We guarantee to respond within 2 working days.

I-7531 & I-7531-UT (CAN Bus Isolated Repeater) User Manual Version 1.6.0 Page：4
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: [email protected]
1. Introduction
I-7531 / I-7531-UT is a CAN repeater used to establish a physical coupling of two or more
segments of a CAN bus system. User can implement tree or star topologies as well as for long
drop lines with I-7531 / I-7531-UT. Connecting via I-7531 / I-7531-UT, the division of a CAN
system into several subsystems increases the maximum number of bus nodes.
Figure1. Application of I-7531 / I-7531-UT
I-7531 / I-7531-UT is an optically isolated CAN repeater which provides 2500 Vrms optical
isolation allowing you to separate and protect critical segments of the system from the rest of the
CAN network. And its galvanic isolation isolates both CAN segments from each other as well as
from the power supply. The CAN connection of I-7531 is by terminal blocks. Apower supply of 10
~ 30 VDC is required. I-7531 / I-7531-UT is housed in a rugged DIN-Rail mountable box, making it
easy to install in an industrial cabinet. Therefore, I-7531 / I-7531-UT can be used in CANopen,
DeviceNet and generic ISO 11898-2 standard.
If user wants to know more detail information about the I-7531 / I-7531-UT, please visit our
website as follow:
http://www.icpdas.com/products/Remote_IO/can_bus/i-7531.htm

I-7531 & I-7531-UT (CAN Bus Isolated Repeater) User Manual Version 1.6.0 Page：5
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: [email protected]
1.1 Features
High speed
Removable terminal block & Mountable on DIN Rail
Bus pins protected against transients in an industrial environment
No disturbance of the bus lines with an un-powered node
Transmit data (TxD) dominant time-out function prevents the output drivers from driving
a permanent dominant state
A thermal protection circuit is integrated to prevent the transceiver from damage if the
junction temperature exceeds thermal shutdown level
1.2 Specification
Support CAN 2.0A/CAN 2.0B
Fully compatible with ISO 11898-2
Maximum communication baud : 800Kbps
Propagation Delay: ~200ns
Driving capability: Up to 100 nodes on each CAN port
Photo-coupler isolation between 2 CAN ports: 2500 Vrms
Power consumption: 2W max
CAN terminal resistors are integrated (can be disabled by jumper)
3KV galvanic isolated among of power supply and each CAN port
Power Supply: +10VDC ~ +30VDC
I-7531’s Operating temperature: -25°C ~ +75°C
I-7531-UT’s Operating temperature: -40°C ~ +85°C
Humidity: 5% ~ 95%
Dimensions: 122 mm x 72 mm x 35 mm
1.3 Application
Home Automation
Vehicle Automation
Monitor system
Factory Automation
Building Automation

I-7531 & I-7531-UT (CAN Bus Isolated Repeater) User Manual Version 1.6.0 Page：6
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2. Technical data
2.1 Block Diagram
Figure 2 is a block diagram illustrating the functions of the I-7531 module. Power supply are with
3000 VDC galvanic isolated between each CAN port. Futhermore, there is photo-isolation 2500
Vrms between two CAN ports.
Figure2. Block Diagram of I-7531

I-7531 & I-7531-UT (CAN Bus Isolated Repeater) User Manual Version 1.6.0 Page：7
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2.2 Appearance
Figure3. Appearance of I-7531 / I-7531-UT
Power Input
CAN Port 1
CAN Port 2
Status LED of Power &
Communication
i-7531
CAN bus Repeater
‧Support CAN 2.0A/2.0B
‧Photo-isolation: 2500 Vrms
‧Expand the number of CAN buses
‧Mountable on DIN Rail
3000VIsolation
GND
11
(CAN)
20 CAN_L
CAN_H
FG
GND
10
(CAN)
1
CAN_L
CAN_H
FG
(R)VS+
(B)GND
Frame Ground
Frame Ground

I-7531 & I-7531-UT (CAN Bus Isolated Repeater) User Manual Version 1.6.0 Page：8
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: [email protected]
2.3 Pin Assignment
Figure4. Pin Assignment of I-7531 / I-7531-UT
Table1. Pin Description of I-7531 / I-7531-UT
No.
Part
Name
Description
1
CAN
Port 1
CAN_L
CAN_Low. Signal Line of CAN port 1.
3
CAN_H
CAN_High. Signal Line of CAN port 1.
5
GND
CAN_Ground (or CAN_GND), Voltage level of
ground of CAN_L and CAN_H of CAN port 1.
7
FG
FG
Frame Groud.
9
Power
Input
(R)VS+
Voltage Source. It could be +10VDC ~ +30VDC.
10
(B)GND
Power Ground.
14
FG
FG
Frame Groud.
16
CAN
Port 2
GND
CAN_Ground (or CAN_GND), Voltage level of
ground of CAN_L and CAN_H of CAN port 2.
18
CAN_H
CAN_High. Signal Line of CAN port 2.
20
CAN_L
CAN_Low. Signal Line of CAN port 2.
GND
11
(CAN)
20 CAN_L
CAN_H
FG
GND
10
(CAN)
1
CAN_L
CAN_H
FG
(R)VS+
(B)GND

I-7531 & I-7531-UT (CAN Bus Isolated Repeater) User Manual Version 1.6.0 Page：9
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: [email protected]
Note 1:
In some cases, the voltage level of CAN_GND of different CAN
device in the same CAN bus system are not equal. At this time, it
could cause some problems to derogate system staibility of this
CAN bus system.
There is one way to relieve this situation; user can connect the
CAN_GND between those CAN devices to achieve equal
voltage level of CAN_GND.
Wiring of CAN_GND is not necessary; user can modify the
configuration of wiring according to actual applications.
Note 2:
Electronic circuits are constantly vulnerable to Electro-Static
Discharge (ESD), which become worse in a continental climate
area. FG(Frame Ground) provides a path for bypassing ESD to
earth ground, allowing enhanced static protection (ESD)
capability and ensures that the module is more reliable.
If user wants to use FG, both the Pin 7 and Pin 14 should be
connected to earth ground. Within I-7531 / I-7531-UT, Pin 7 and
Pin 14 (FG) are not interconneced.

I-7531 & I-7531-UT (CAN Bus Isolated Repeater) User Manual Version 1.6.0 Page：10
Copyright © 2018 ICP DAS Co., Ltd. All Rights Reserved E-mail: [email protected]
2.4 Wire Connection
Figure5. Wire Connection of I-7531