IXXAT CAN User manual

Copyright IXXAT Automation GmbH CAN Repeater - Manual, Version 3.6
1
CAN-Repeater
Manual
1. Description
The CAN-Repeater is used for electrical isolation of two segments of a CAN-
network, to increase the number of possible CAN nodes, for signal regeneration
and for setting up star or tree topologies. A special feature of the IXXAT
Repeater is an error detection mechanism with which a defective segment is
detected and shut down. The remaining network can thus continue
communicating without faults. The segment is reconnected to the network
automatically after the problem has been solved.
The automatic separation of a defective network segment is made after
reception of a permanent dominant level for more than 20 bit times. The
separated network will be reconnected after reception of a recessive bit.
2. LEDs
The status of the CAN Repeater and the CAN communication lines are indicated
by four LEDs mounted at the front of the housing.
Transmitting CAN 2 (green)
Status LEDs
Transmitting CAN 1 (green)
CAN 2 segment defect (red)
CAN 1 segment defect (red)
CAN 1
CAN 2
figure 2-1: Status LEDs of the CAN Repeater
Automation GmbH

Copyright IXXAT Automation GmbH CAN Repeater - Manual, Version 3.6
2
3. Power and CAN Connectors
At the left and right side of the housing are screw connectors for the power
supply and CAN line. The pinning of these connectors is as shown in figure 3-1.
1: +9 - 35 V DC
2: GND
Power supply
First CAN line
6: CAN High
7: CAN Low
8: GND
Second CAN line
3: CAN High
4: CAN Low
5: GND
figure 3-1: Terminal allocation.

Copyright IXXAT Automation GmbH CAN Repeater - Manual, Version 3.6
3
4. Bus termination configuration
For optimum communication, the individual electrical CAN-segment is to be
terminated at both ends with the impedance of the line. The termination
resistors prevent reflections on the line ends and ensure a current path for
discharging the dominant to the recessive level. Termination resistors are
mounted on the repeater and could be activated or deactivated by soldering
jumper.
Attention: Open the device only on electrostatic safe areas!
Bus termination:
Default configuration:
Order number 1.01.0064.44000, 1.01.0064.90001:
Termination CAN1 and CAN2 Rt=120 Ωactive
(Soldering jumper closed at „120R Term.“).
Order number 1.01.0064.90003:
No termination at CAN1
Termination at CAN 2 Rt = 120 Ωactive.
Order number: 1.01.0064.46000:
Termination Rt= 120 Ωat CAN 1 active.
No termination at CAN2 allowed (Low Speed- CAN).
To close the soldering jumper means to activate the
termination resistor of Rt= 120 Ωbetween CAN_H and
CAN_L at the described CAN segment
To disable the bus termination open the soldering jumper.

Copyright IXXAT Automation GmbH CAN Repeater - Manual, Version 3.6
4
> 500 kbps
> 100 kbps
> 5 kbps
Busabschluss
CAN 2
CAN 1
error shutdown
2µs
1µs
500ns
300ns Sperrzeit
figure 4-1: Soldering jumper for activation of the bus
terminations, error shutdown, and repeater off-time
5. Configuration of the Error Detection
The separation of a defective network segment is made after reception of a
permanent dominant level for more than 20 bit times. The separated network
will be reconnected after reception of a recessive bit. The duration of the 20 bit
times depends on the soldering jumpers according to the figure 4-1. Only 1
Jumper must be closed.
The duration of the 20 bit times is measured of the data rate ratio of the
soldering jumpers. Please choose a bit rate jumper next to used bitrate. Default
configuration is a closed soldering jumper >5k Bit.
6. Configuration of repeater off-time
If CAN segments has a high capacitance load, discharge of CAN levels could not
be completed during the repeater off-time. This effects could arise at long cable
length or high number of CAN nodes. This could cause a disturbances on the
CAN network. For adoptions to such circumstances the repeater off-time could
be enlarged by soldering jumpers according figure 4-1.
Attention: Only one soldering jumper shall be closed. To enlarge the off-time of
the repeater also means to enlarge the round trip delay trough the repeater.

Copyright IXXAT Automation GmbH CAN Repeater - Manual, Version 3.6
5
7. Technical Data
Display: Transmission (2 green LEDs);
Defect segment (2 red LEDs)
CAN bus interface: ISO/IS 11898
(Texas SN65HVD251 or Philips PCA 82C251)
Low-Speed: ISO 11898-3 (Philips TJA1054)
Terminals (CAN High, CAN Low, CAN GND);
Baudrate: up to 888 kbps
Delay: 150 ns (corresponds to ~30 m (~90ft.) bus
length) between CAN 1 and CAN 2
Termination resistor: 120 Ω
Power supply: 9-35 V DC, 1,5 W typ., through terminals
Housing, size: Plastic enclosure for DIN rail,
110 x 75 x 22 mm
Operating temperature range: -20 … +70°C
Isolation: 1000 V according EN60950 (isolated version)
8. Available Options
In the standard version of the CAN-Repeater, the CAN-connections of the
voltage supply and the two CAN-circuits are electrically isolated.
As an option, the Repeater can also be supplied without electrical isolation. This
reduces power consumption and delay time. In this option the Repeater can be
operated with a bit rate of up to 1 Mbits/s.
As a further option, CAN 2 can be designed as a low-speed interface. The
Repeater can thus be used as a level converter between low-speed and high-
speed CAN busses.

Copyright IXXAT Automation GmbH CAN Repeater - Manual, Version 3.6
6
Declaration of conformity
IXXAT Automation declares that the product: CAN-Repeater
with order numbers: 1.01.0064.44000
1.01.0064.46000
1.01.0064.90001
1.01.0064.90003
1.01.0064.90005
meets the requirements of the standards:
DIN EN 55022/ 05.1999 Class B
DIN EN 61000-6-2 / 08.2002
according to the test report: IX315_01.DOC
The product therefore complies with the EC-directive: 89/336/EEC; 93/68/EWG
21.07.06, Dipl.-Ing. Christian Schlegel , Managing director
Ixxat Automation GmbH
Leibnizstrasse 15
88250 Weingarten

Copyright IXXAT Automation GmbH CAN Repeater - Manual, Version 3.6
7
FCC Compliance
Declaration of conformity
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions:
• this device may not cause harmful interference, and
• this device must accept any interference received, including interference that may
cause undesired operation.
Class A digital device instructions:
Note: This equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to
cause harmful interference in which case the user will be required to correct the
interference at his own expense.
IXXAT
Headquarter US Sales Office
IXXAT Automation GmbH IXXAT Inc.
Leibnizstr. 15 120 Bedford Center Road
D-88250 Weingarten USA-Bedford, NH 03110
Tel.: +49 (0)7 51 / 5 61 46-0 Phone: [phone]
Fax: +49 (0)7 51 / 5 61 46-29 Fax: [phone]
Internet: www.ixxat.de Internet: www.ixxat.com
e-Mail: [email protected] e-Mail: [email protected]
Document No. 4.01.0064.20000