Connecting The Fieldbus; Fieldbus Cable; Cable Specifications - Festo CTEU-PB Electronics Description

1. Installation
1.5

Connecting the fieldbus

1.5.1 Fieldbus cable

1.5.2 Cable specifications

Festo P.BE-CTEU-PB-OP+MAINT-EN en 1208NH English
Note
Faulty installation and high transmission rates may cause
data transmission errors as a result of signal reflections
and attenuations.
Always use a bus terminal on both ends of the fieldbus
•
segment (see chap. 1.5.6)
Connect the screening continuously to all fieldbus cables
•
and earth the screening only once to avoid ground
loops.
Observe the specifications in the product documentation
•
of your control system regarding cable type, usable
T-adapters and max. length of branch lines.
In calculating the max. permissible length of the fieldbus
•
cable dependent on the baud rate used, also consider
the sum of the length of the branch lines.
Note
If the bus node is installed on a movable mounting in a
machine, the fieldbus cable must be provided with strain
relief on the moving part of the machine. Also observe the
corresponding regulations in EN 60204 Part 1.
For fieldbus communication, use a twisted, screened two-wire
cable in accordance with the PROFIBUS specification
(EN 50170, cable type A):
1-13