PiXtend eIO Hardware Manual
Min. conductor cross-section
of the bus lines / differential
pair
0.20 mm² (AWG24)
Recommended conductor
cross section of the
Bus Lines / Differential Pair
0.25 mm² (AWG23)
Permitted cable length
< 30 m
> 30 m
unshielded cables
shielded cables
For Modbus, shielded cables
must always be used and
connected to PE at one point
Permissible bus length
(“trunk cable”)
max. 1000 m*
at 9,600 baud & 0.20 mm²
(AWG24) Conductor cross
section or larger
*the maximum bus length is
generally dependent on:
- the nature, environment
and cross-section of the
cables used
- the software used
- the circuit technology other
participants on the bus
- the number of participants
on the bus
and therefore can not be
generalized.
Table 17: Technical data – RS485 bus interface
Warning!
Exceeding the specified maximum values may result in transmission
errors, malfunctions and component defects.
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