Connecting The Can Bus; Can Bus Line - Festo CPX-CM-HPP Electronic Manual

2. Fitting and installation
2.4

Connecting the CAN bus

2.4.1 CAN bus line

Festo P.BE−CPX−CM−HPP−EN en 0910NH
Note
In case of faulty installation or high transmission rates,
data transmission errors can occur as a result of signal
reflections and attenuations.
Transmission errors can be caused by:
missing or incorrect terminating resistor
incorrect screened connection
branches
large distances
unsuitable cables
Use a connecting cable from Festo with open end,
e.g. NEBC−M9W5−K−5−N−LE3, as the CAN bus line between
CPX−CM−HPP and the first motor controller.
Use a twisted, screened 4−wire cable as CAN bus line
between the motor controllers. A CAN bus plug is available as
an accessory (è www.festo.com/catalogue) to connect the
motor controller.
If the Festo CAN bus plug is used, a cable diameter of
5 ... 8 or 7 ... 10 mm is permitted.
Note
If the CPX terminal is mounted movably in a machine,
the CAN bus line on the movable part must be provided
with strain relief. Also observe the relevant regulations in
EN 60204 part 1.
2−7