BMW E65 User Manual download pdf (Page 29)

E65 Bus Systems

MOST Bus

The MOST bus transmits all data required by the

communication and information systems in the vehi-

cle. MOST stands for Media Orientated Systems

Transport.

The connection between the individual control units

is provided by a ring bus which transports the data in

one direction only. That means that a control unit

always has two optical fiber cables - one for the

transmitter and one for the receiver.

The MOST control units are linked exclusively by

fiber-optic connections. Therefore, the transmitter

and receiver diodes can be positioned anywhere

within the control unit as optical fibers are used inside

the control unit as well.

As a result of the receiver modules

being set far into the control unit, the

fiber ends can be set back inside the

wiring loom connector.

This provides additional protection for

the delicate fiber ends.

The 2-pin fibre-optic module is identi-

cal on all types of connectors.

Component families and connectors

are defined as standards within the

MOST consortium.

Pin 1 is always assigned to the

incoming optical fiber and Pin 2

to the outgoing optical fiber.

KT-8788

(1) Fiber optic connector

(2) Socket on control unit

(3) Fiber optic “jumper” inside of control unit

(4) Receiver module with diode

example: ASK

KT-8887

Typical connector used

in the MOST network

KT-8852

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 50 51

No comments

BMW E65 User Manual Page 29