63 69 149 D3561
D3561
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076.01.07
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02 02.2017
30
Dentsply Sirona
5 Important information
Service Manual Sinius / Sinius CS / Sinius TS
5.3 CAN BUS
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5.3.2
Measurements on the CAN BUS
In each CAN network there are 2x 120-ohm resistors that, measured in
parallel on the CAN line, result in 60 ohms. If you measure 120 ohms on
the CAN line with an ohmmeter (when the dental treatment center is
switched off), there is a disruption in the line. In the case of a disruption,
measure the connections between the connectors.
The CAN bus should always be checked for missing components.
Examples of CAN measurements
Resistance = 60 ohms
Cable run OK
Measurement of CANH → CANL
Resistance = 120 ohms
Fault in the cable run
Measurement of CANH → CANL
Resistance = 0 ohms
Cable run OK
Measurement of CANL source → CANL target
Resistance = 240 ohms
Fault in the cable run
Measurement of CANH source → CANH target