Connecting the PSSu system
Installation Manual PSSuniversal
21262-EN-07
50
– Power supply: 2.5 mm
2
(AWG12)
– Functional earth: 2.5 mm
2
(AWG12)
}
On base modules with screw terminals:
– If you use a multi-strand cable to connect the I/Os, it is recommended that you use
ferrules conforming to Parts 1 and 2 of DIN 46228, 0.14 ... 1.5 mm
2
, Form A or C,
although this is not essential. To crimp the ferrules you can use crimp pliers (crimp
form A or C) conforming to EN 60947-1, such as the PZ 1.5 or PZ 6.5 from
Weidmüller, for example.
– Maximum torque setting: 0.8 Nm
}
Use copper wiring.
6.5.2
Connecting FS inputs and outputs
In FS applications, it is essential that short circuits and open circuits are unable to cause a
hazardous condition within a plant.
The way in which this is done will depend on the degree of hazard from the plant section,
the switching frequency of the sensors and the level of safety of the sensors and actuators.
These points must be assessed in conjunction with the certification body responsible for
safety (e.g. BG, TÜV).
Depending on the application area and its respective regulations, the FS section can be
used up to SIL CL 3 of EN 62061 and up to PL e (Cat 4) of ISO 13849-1.
Various tests may be configured on FS input/output modules. These tests can be used to
detect many short circuits and open circuits. Examples of such tests are:
}
Off tests for outputs that are switched on
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On tests for outputs that are switched off
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Tests for shorts between the outputs
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Test pulses for detecting shorts between contacts on inputs
Wiring guidelines and connection examples are available in the operating manuals or data
sheets for the input/output modules.
6.6
Wiring the compact modules
We recommend you use a screw driver with a 0.4 x 2.5 mm (DIN 5264) blade!
Strip the cable:
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Strip the cable [1] and apply a ferrule if necessary (DIN 46228/Part 1 or DIN 46228/Part
4).
Connect cable:
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Using the screwdriver, press the actuator button on the spring-loaded terminal down as
far as it will go [2], keep it held down and insert the stripped cable into the plug connec-
tion as far as it will go [2].
}
Check that the cable is firmly seated [3].
