Peak PCAN-Optoadapter User manual

Plug-on Adapter for Decoupling CAN
Networks
User Manual
PCAN-Optoadapter
2.0.0

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Products taken into account
Product Name Model Part number
PCAN-Optoadapter IPEH-002038
CANopen® and CiA® are registered community trade marks of CAN in Automation
e.V.
All other product names mentioned in this document may be the trademarks or
registered trademarks of their respective companies. They are not explicitly marked
by “™” or “®”.
© 2011 PEAK-System Technik GmbH
PEAK-System Technik GmbH
Otto-Roehm-Strasse 69
64293 Darmstadt
Germany
Phone: [phone]
Fax: [phone]
www.peak-system.com
[e-mail]
Document version 2.0.0 (2011-10-05)

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Contents
1Introduction 4
1.1 Properties at a Glance 4
1.2 System Requirements 4
1.3 Scope of Supply 5
2Connectors 6
2.1 Connection Primary Side 6
2.2 Connection Secondary Side 7
3Operation 8
3.1 Signal Delay 8
4Technical Specification PCAN-Optoadapter 9
Appendix A CE-Certificate 10
Appendix B Dimension Drawing 11

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1Introduction
The PCAN-Optoadapter is a universal plug-on adapter to allow
galvanic isolation of High-speed CAN bus systems.
Its integrated logic means that decoupling can be installed at any
point in the CAN network.
1.1 Properties at a Glance
Plug-on adapter for decoupling the CAN bus for all PEAK CAN
interfaces
Optical decoupling and electrical isolation by DC/DC converters
up to 500 V
Bit rates up to 1 Mbit/s
High-speed CAN transceiver NXP TJA1050
CAN bus connection via D-Sub, 9-pin
(in accordance with CiA® 102)
Extended operating temperature range from -40 to 85 °C
(-40 to 185 °F)
All PEAK CAN interfaces can be set to the supply voltage
required
1.2 System Requirements
The power supply is done via pin 1 of the 9-pin female D-Sub
connector (primary side). Therefore the attached CAN interface
must provide 5 Volts.

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Since the PCAN-Optoadapter already contains a CAN bus
termination on the primary side, the connected CAN adapter
doesn’t need to be terminated separately.
1.3 Scope of Supply
Adapter in plastic casing
Manual in PDF format

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2Connectors
2.1 Connection Primary Side
The PCAN-Optoadapter is directly connected to a CAN interface
with its so called primary side (D-Sub (f)).
Figure 1: Pin assignment at the primary side
Attention! Risk of short circuit! When you connect the PCAN-
Optoadapter to or remove it from a CAN interface, latter must
be turned off (without power supply). Otherwise the PCAN-
Optoadapter or other electronic components may be damaged.
The lines for the differential CAN signal CAN_H and CAN_L are
terminated on the adapter with a 60-Ωresistor (fixed). An additional
termination at the CAN interface is not needed.
For general supply the adapter uses a direct voltage of +5 V. This
must be applied to pin 1 of the CAN connector. The CAN interfaces
of the PCAN series are able to provide 5 Volts on Pin 1.

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2.2 Connection Secondary Side
A High-speed CAN bus (ISO 11898-2) is connected to the 9-pin D-
Sub connector. The pin assignment for CAN corresponds to the
specification CiA® 102.
Figure 2: Pin assignment at the secondary side

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3Operation
Note: A configuration of the PCAN-Optoadapter is not needed.
You can use it instantly.
3.1 Signal Delay
The PCAN-Optoadapter has a transit time delay of 145 ns. This
corresponds to a cable length of 29 m. Therefore, you should
consider the dependence of the maximum length of a CAN bus on
the bit rate at the installation of the PCAN-Optoadapter. The
following table shows the maximum possible CAN bus length at
different bit rates:
Bit rate Bus length Bus length with
PCAN-Optoadapter
1 Mbit/s 40 m 11 m
500 kbit/s 110 m 81 m
250 kbit/s 240 m 211 m
125 kbit/s 500 m 471 m
50 kbit/s 1,3 km
20 kbit/s 3,3 km
10 kbit/s 6,6 km
5 kbit/s 13,0 km
For small bit rates,
the delay of the
adapter can be
neglected
The listed values have been calculated on the basis of an idealized
system and can differ from reality.

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4Technical Specification
PCAN-Optoadapter
Connectors
CAN D-Sub (m), 9 pins
Pin assignment according to specification
CiA® 102
CAN
Specification ISO 11898-2
High-speed CAN (up to 1 Mbit/s)
2.0A (standard format) and 2.0B (extended format)
Transceiver NXP TJA1050
Galvanic isolation Up to 500 V
Termination 62 Ωon the primary side
none on the secondary side
Signal delay ca. 145 ns
Power supply
Supply voltage +5 V = via pin 1 of D-Sub (f)
Power consumption max. 120 mA
Measures
Size 63 x 34 x 17 mm
Weight 25 g
Environment
Operating temperature -40 - +85 °C (-40 to 185 °F)
Temperature for storage and
transport
-40 - +100 °C (-40 to 212 °F)
Relative humidity 15 - 90 %, not condensing
EMC EN 55024: 2003-10
EN 55022: 2008-05
EC directive 2004/108/EG

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Appendix A CE-Certificate