Appendices
Bushealth Measurements
A
A-5
automobile manufacturers leave bus signals at the
connector default on, other manufacturers require bus
signals to be enabled via an external controller.
CAN_H
CAN_L
Ground
1
2
6
3
4
5
7
8
9
DB-9
FEMALE
9 16
High Speed:
HS_CAN_H: Pin 6 / HS_CAN_L: Pin 14
Medium Speed:
MS_CAN_H: Pin 3 / MS_CAN_L: Pin 11
Common (Signal Ground): Pin 5
Battery: Plus: Pin 16 / Minus: Pin 4
1 OBD2 (FEMALE) 8
Interbus S
Is used in Process Industry and Factory Automation such
as Assembly, Welding, and Materials Handling machines.
Controller and Devices are arranged in a ring system as
shown in the figure below. Interconnection between the
devices is achieved via a Twisted Pair of lines DO (Data
Out, yellow wire) / Not-DO (green) and another pair DI
(Data In, gray) / Not-DI (pink). Data traffic is continuous,
passing data packets through the chain of devices.
CONTROLLER
DEVICE 1
DEVICE N
DO
DI
DO DO
DI
DI
To check Interbus S, ScopeMeter Channel A is on and
DC coupled. The recommended probe is VPS40 (10:1).
The probe tip must be connected to the DO (or DI) wire;
the COM input (or Black Ground Lead) to the Not-DO (or
Not-DI) wire. The wires can be reached with Back Probe
Pins at screw terminals at a device’s wire entry point: for
instance at a Junction Box. In addition the figure below
shows the pinning of a DB-9 female connector wired for
Interbus S.
Ground
DO
DI
ControlNet
Is a network system used for high performance
automation and process control. Connection between
devices is achieved via 75 Ω coaxial cables. The figure
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