Electrical installation
Page 109
Product Manual „Servo drives ARS 2320, ARS 2340, ARS 2320W, ARS 2360W“
Version 8.0
8.7.4
Cable type and configuration [X1]
The cable names given refer to cables made by Lapp. They have proven to be reliable and are
successfully used in many applications. However, it is also possible to use comparable cables from
other manufacturers, for example Lütze or Helukabel.
LAPP KABEL UNITRONIC-LiYCY; 25 x 0.25 mm²
Figure 34
shows the cable between the ARS 2300 servo drive and the control system. The cable
shown has two cable shields.
The outer cable shield is connected to PE on both sides. Inside the ARS 2300 servo drive, the
connector housing of the D-Sub connector is connected to PE. If metal D-Sub connector housings are
used, the cable shield is simply squeezed underneath the strain relief.
Often an unshielded cable is sufficient for 24V signals. In environments with high interferences or in
the case of long cables (l > 2m) between the control system and the ARS 2300 servo drive, Metronix
recommends the use of shielded control cables.
Although the analogue inputs of the ARS 2300 servo drive are differential, using unshielded cables for
the analogue signals is not recommended as interferences, for example caused by switching contacts,
or output stage interferences of the converters can reach high amplitudes. They couple themselves
into the analogue signals and cause common-mode interferences which may lead to deviations of the
analogue measured values.
In the case of limited cable lengths (l < 2m, wiring inside the control cabinet), the outer dual-sided PE
shield is enough to guarantee trouble-free operation.
For optimal interference suppression of the analogue signals, the cores for the analogue signals have
to be shielded together and separated from other cores. At the ARS 2300 servo drive, the inner cable
shield is connected on one side to AGND (pin 1 or 14). It can be connected on both sides in order to
establish a connection between the reference potentials of the control system and the
ARS 2300 servo drive. Pins 1 and 14 are directly connected to each other inside the servo drive.
8.7.5
Connection notes [X1]
The digital inputs are rated for control voltages of 24V. The high signal level already ensures a high
level of interference immunity of these inputs. The ARS 2300 servo drive provides an auxiliary voltage
of 24V which may be loaded with 100 mA maximum. As a result, the inputs can be activated directly
via switches. Activation via the 24V outputs of a PLC is of course also possible.
The digital outputs are so-called “high-side switches”. This means that the 24V of the ARS 2300 servo
drive are actively switched through to the output. Loads such as lamps, relays, etc. thus must be
connected between the output and GND24. The four outputs DOUT0 to DOUT3 can be loaded with a
maximum of 100mA each. The outputs can also be led directly to 24V inputs of a PLC.
Содержание ARS 2320
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