Siemens BTC-BR Manuale Pagina 168

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3 Removing and fitting housing
3–76 Section 3 © Siemens VDO Trading GmbH TU00-1318-0200302
3.17 Data output – data block
Fig. 3-59 Data output and optical fibre
From 09.85 all 1318 units have been fitted with an optical, serial data interface (1).
Data carriers are transmitted to the receiver by means of a fibre optic cable (2) with the
smallest bend radius of 50 mm.
The data output LED works in the visible area. (See Abb. 2-53 item (4)).)
Within the transmission interval one data block is transmitted with the speed unit and
two data blocks with the RPM unit. These data blocks have the following content.
1 Data interface 5 Crimp ring
2 Optical fibre cable 6 Screw cap
3 Optical fibre 7 Seal die
4 Sleeve (red)
Data format Transmission interval
5 x 8 bit, UART compatible,
300 baud, phase coded
0.5 seconds
Data block 1 Data block 2
Distance pulses (v speed) •RPM n
Current statuses System identification n
Switch position for knobs
Generator pulse check for n
Additional stylus
CRC test mark
Warning device
System identification for v
Sender unit pulse check for v
CRC test symbol
3 4 5 6 7
2
max. 5
5/16-32 UNCF - 2B
1
Length min. 0.5 m/ max. 5
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