Hardware Manual PCD1.M2110R1 │ Document 27-619 │ Version ENG 04 │ 2018-08-20
Saia-Burgess Controls AG
Introduction
Orientation
2-3
2
3.
Check that the maximum supply current is sufficient for the CPU.
4. Estimate draw from 24 V supply. Use estimation values. Estimation values can
be found in the section about the power needs of PCD1 I/O modules, or they
may be determined using the device configurator.
Please note that, for most applications, the outputs represent the greatest load on
the 24 V supply. For 16 outputs each having a load output of 0.5 A, the total load
will be 8 A, if all outputs are connected.
2.1.2
Wiring
●
The 230 VAC supply cables and signal lines must routed with at least 10 cm
separating them. We also recommend leaving a space between the supply
cables and signal lines in the control cabinet.
●
Digital signal / bus lines and analogue signal / sensor lines should be routed
separately.
●
We recommend using shielded cable for analogue signal lines.
●
The shielding should be earthed at the inlet and/or outlet of the control cabinet.
The shielding should be as short as possible and have the greatest possible
cross-section. The central earthing point should be > 10 mm² and be connected
to the earthing cable by the shortest route.
●
The shielding is normally only connected to the control cabinet on one side,
unless the available potential equalisation has a significantly lower resistance
than the shielding resistance.
●
Inductive loads installed in the control cabinet, e.g. protective coils, must be
equipped with suitable suppressors (RC elements).
● Control cabinet components with high field strengths, e.g. transformers
or frequency converters, should be shielded by separating plates with a good
earthing connection.
Surge protection for large distances or external lines
●
With the installation of lines outside of buildings or over large distances,
suitable anti-surge measures must be taken. These measures are crucial for
bus lines, in particular.
●
Lines installed outdoors must have shielding with a suitable power line capacity
and be earthed at both ends.
●
Surge conductors should be installed at the control cabinet inlet.
