Connecting The Can Bus; Can Bus Line - Festo CPX-CM-HPP Description

2. Fitting and installation
2.4

Connecting the CAN bus

2.4.1 CAN bus line

Festo CPX-CM-HPP-EN 2017-06b English
Note
Faulty installation and high transmission rates may cause
data transmission errors as a result of signal reflections
and attenuations.
Transmission errors can be caused by:
– missing or incorrect terminating resistor
– incorrect screened connection
– branches
– long distances
– unsuitable cables
Use a Festo connecting cable with open end as a CAN bus
line between CPX-CM-HPP and the first motor controller,
e.g. NEBC-M9W5-K-5-N-LE3.
Use a twisted, screened 4-core cable as CAN bus line
between the motor controllers. A CAN bus plug is available
as an accessory to connect the motor controllers
(è www.festo.com/catalogue).
When using the Festo CAN bus plug, a cable diameter of
5 ... 8 or 7 ... 10 mm is permitted.
Note
If the CPX terminal is mounted onto the moving part of
a machine, the CAN bus line on the moving part must be
provided with strain relief. Also observe the corresponding
regulations in EN 60204 Part 1.
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