K2L MOCCA compact 2.3 Скачать руководство пользователя страница 16 | Manualshive

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K2L MOCCA compact 2.3 Скачать руководство пользователя страница 16

MOCCA compact 2.3

Termination of Field Busses 16

4

Termination of Field Busses

The MOCCA compact 2.3 is intended to be used as stimulation and test device for automotive field
busses and DUTs connected to them. Following this intention the design is constrained to ensure a
behavior as passive as possible.

4.1

CAN

4.1.1

High Speed Transceiver

As high speed CAN-transceiver a TJA1041 from NXP is used. High speed CAN-busses according to
ISO 11898-2 are terminated with 120

Ω

at each end. Therefore MOCCA compact 2.3 does not

terminate the bus.

Termination resistors can be ordered separately from K2L.

4.1.2

Fault Tolerant Transceiver

As fault tolerant CAN-transceiver a TJA1054 from NXP is used. Fault tolerant CAN-busses usually
have a distributed termination. The value of the termination in each node depends on the number of
nodes in the network. To avoid effects on the total impendence of the network the MOCCA compact
2.3 has a weak termination of 5k6

Ω

.

4.1.3

Single Wire Transceiver

The single wire CAN is terminated with 9k1

Ω

.

4.2

FlexRay

The termination of a FlexRay bus depends on the bus topology. In each active branch there have to be
two terminations. The MOCCA compact 2.3 can be installed in various topologies. Hence a
termination in the device is not foreseen.

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Содержание MOCCA compact 2.3

Страница 1: ...MOCCA compact 2 3 Document Release MOCCA compact 2 3...

Страница 2: ...means electronic or mechanical including photocopying and recording for any purpose other than the purchaser s personal use without prior written permission from K2L GmbH K2L and the K2L logo are regi...

Страница 3: ...afety instructions III Document History Version Brief description of change V1 0 000 Initial Release V01 01 00 CAN Breakout cable added Image of back panel power CAN added types of LIN and single wire...

Страница 4: ...hnical Specification 9 3 Pin out of the Connectors 10 3 1 Connectors on the Back 10 3 1 1 High Speed CAN 10 3 1 2 FlexRay 11 3 1 3 Low Speed CAN LIN 12 3 1 4 CAN Breakout Cable optional Accessory 12 3...

Страница 5: ...View on the Front 14 Tables Table 1 1 Abbreviations 7 Table 1 2 Technical Specification 9 Table 2 1 Pinning of Connector High Speed CAN 1 3 5 10 Table 2 2 Pinning of Connector High Speed CAN 2 4 6 11...

Страница 6: ...st device in the chain is able to take Do not cascade more than 8 devices in chain For all setups a fuse of max 4A in the supply cable to the first device or the use of the current limitation of your...

Страница 7: ...e Bus Minus in FlexRay BP Line Bus Plus in FlexRay CAN Controller Area Network automotive bus system CPU Central Processing Unit EHC External Host Controller FOT Fiber Optical Transceiver FR A B FlexR...

Страница 8: ...ions may not be available in a specific configuration 6 CAN busses two of them with selectable transceiver high or low speed and high speed or single wire MOST25 MOST50 or MOST150 1 FlexRay with chann...

Страница 9: ...mption standby 25 mA Relay for external Load Potential free shutter max 5A 12V DC Low Speed CAN Transceiver NXP TJA 1054 High Speed CAN Transceiver NXP TJA 1041 Single Wire CAN Transceiver OnSemi NCV7...

Страница 10: ...escribes the respective connectors pinning Illustration 3 1 Connectors seen from the supply side 3 1 1 High Speed CAN The provided GND pins must not be used unless there is no other GND connection The...

Страница 11: ...CAN4 High HIGH level CAN bus line Table 3 2 Pinning of Connector High Speed CAN 2 4 6 3 1 2 FlexRay The provided GND pin must not be used unless there is no other GND connection This pin must not be...

Страница 12: ...nect only one CAN bus to each DE 9 connector Usually they connect CAN Low line to pin 2 and CAN High line to pin 7 Pin 3 is usually GND Illustration 3 2 CAN Breakout Cable each of the Sockets I II and...

Страница 13: ...owered by the optional available wall power supply or by any other power supply which is capable to deliver 12V and 1A If the wall power supply is not used the included power cable has to be used to c...

Страница 14: ...1 USB The USB port is a standard USB B type receptacle 3 2 2 Relay The relay is able to switch 5A as a potential free shutter The two left pins and the two rights are internally connected Please see...

Страница 15: ...The LAN connector is a RJ45 receptacle according to TIA 568 3 2 5 LEDs The MOCCA compact 2 3 offers seven LED positions where UD1 UD4 and Operation are dual color positions LED Position Red Green Acti...

Страница 16: ...e bus Termination resistors can be ordered separately from K2L 4 1 2 Fault Tolerant Transceiver As fault tolerant CAN transceiver a TJA1054 from NXP is used Fault tolerant CAN busses usually have a di...

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