Bosch Rexroth IndraControl L45, Project Planning Manual

Page: 62 / 84

Observe the following when shielding:
●
Fit the shield over an area as large as possible under the clip in the shield
connector.
● Ensure proper contact between the connector and the terminal.
● Avoid damaging or squeezing of cores. Avoid stripping the lines too much.
● Connect the cores properly.
Lay all line and data cables in separate cable channels.
Shielding the PROFIBUS Cable
To achieve an immune transmission, Bosch Rexroth recommends a two-core
twisted and shielded line pair, as is specified as cable type A in EN 50 170, part
8-2. Cable type B, which is also described in the above specification, is obsolete
and must not be used any longer.
The cable parameters are described in
chapter 7.4.3 "PROFIBUS DP (option‐
al)" on page 44 .
The line shield must be applied in the bus connector. In case of installation in
the switch cabinet, the line shield of the connected PROFIBUS line must be
connected to a shield bus using cable clips, if possible directly behind the cable
bushing. This requires the appropriate shield terminal.
Shielding Analog Sensors and Actuators
● Always connect analog sensors and actuators using shielded and twisted
cable pairs.
● Connect the shield system via the shield connector.
Connection of the shield to the shield connector is described on page .
Depending on the analog input and output terminals, there are several ways of
grounding the shield. The length of the cables must also be taken into consid‐
eration.
Terminal type Connection at the termi‐
nal
Cable
length
Connection to the sen‐
sor/actuator
Analog input termi‐
nal R-IB IL AI 2/SF
Ground connections are
connected to FE via an
RC element inside the
terminal.
< 10 m –
> 10 m Apply the sensor direct‐
ly to the PE.
Analog output termi‐
nal IB R-IL AO...
Directly on FE using a
shield clip.
< 10 m –
> 10 m Decouple the actuator
with RC element and
apply it to the PE.
Fig.8-9: Overview: Shield connection of analog sensors/actuators
Connecting Analog Input Terminals R-IB IL 24 AI 2/SF
● Connect the shield system via the shield connector (see Connecting Lines
to Tension Spring Connection Pointspage 62 ).
● Connect the shield system at the sensor to the FE potential over an area
as large as possible.
The ground connection in the terminal is connected to FE via an RC element
inside the terminal.
Bosch Rexroth AG DOK-CONTRL-ICL45L65L85-PR01-EN-P
Rexroth IndraControl L45/L65/L85 Control
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Installation and Maintenance