Sirona Intego - Measurements on the S-COM Bus

64 57 316 D3543
26 D3543.076.01.04.02 06.2015
5Important information Sirona Dental Systems GmbH
5.4S-COM Service Manual INTEGO / INTEGO pro
5.4.2 Measurements on the S-COM bus
In the S-COM network, there are 2x 100-ohm resistors that, measured in
parallel on the S-COM line, result in 50 ohms. If you measure 100 ohms
on the S-COM 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 S-COM bus should always be checked from the perspective of the
missing component.
Examples of S-COM measurements
Resistance = 50 ohms
Cable run OK
Measurement SCOM + → SCOM -
Resistance = 100 ohms
Fault in the cable run
Measurement SCOM + → SCOM -
Resistance = 0 ohms
Cable run OK
Measurement SCOM - source → SCOM - destination
Resistance = 200 ohms
Fault in the cable run
Measurement SCOM + source → SCOM + destination