8-14 Installation and Maintenance IndraControl L40
DOK-CONTRL-IC*L40*****-PR02-EN-P
Shielding in Case of 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
8-17, "Connecting Shielded Lines Via the Shield Connector".
Depending on the analog input and output modules, there are several
ways of grounding the shield. The length of the cables must also be taken
into consideration.
Module type Connection to the module Cable length Connection to the
sensor/actuator
< 10 m –Analog input module
R-IB IL AI 2/SF
Ground connections are connected
to FE via an RC element inside the
module. > 10 m Apply the sensor directly to the
PE.
< 10 m –Analog output module IB R-
IL AO...
Directly on FE using a shield clip.
> 10 m Decouple the actuator with RC
element and apply it to the PE.
Fig. 8-9: Overview: Shield connection of analog sensors and actuators
Connecting the Analog Input Module R-IB IL 24 AI 2/SF
• Connect the shield system via the shield connector (see page 8-17,
"Connecting Shielded Lines Via the Shield Connector").
• Connect the shield system at the sensor to the FE potential over as
large an area as possible.
The ground connection in the module is connected to FE via an RC
element inside the module.
A
B
Sensoranschluss.FH9
L: A Module side
B Sensor side
Fig. 8-10: Connection of analog sensors in case of signal lines > 10 m
Note: If you intend to use both channels of the module R-IB IL AI
2/SF, you may connect the shield system in several ways,
depending on the line cross-section.
1 To connect the two sensors, you should use a multi-core line;
connect the shield via the shield connector, as described above.
2 To connect the two sensors, you should use a thin line; connect
the shield system for both lines via the shield connector.
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