Chapter 10 Installation and wiring MASTER-K
10-14
4) Notes on using 24 VDC output of the power supply module
- To protect the power supply modules, do not supply one I/O module with 24 VDDC
from several power supply modules connected in parallel.
- If 24 VDC output capacity is sufficient for one power supply module, supply 24 VDC
from the external 24 VDC power supply as shown below.
5) Twist the 110 VAC, 220 VAC, and 24 VDC cables as closely as possible. Connect
modules with the shortest possible wire lengths.
6) To minimize voltage drop, use the thickest (max. 2 mm
2
) wires possible for the 100 VAC,
200VAC and 24 VDC cables.
7) Do not bundles the 100 VAC and 24 VDC cables with main-circuit(high voltage, large
current) wires or the I/O signal wires. If possible, provide more than 100 mm distance
between the cables and wires.
8) As a lightning-protection measure, connect a surge absorber as shown below.
9) Use a insulating transformer or noise filter for protection against noise .
10) Twist every input power supply wires as closely as possible. Do not allow the transformer
or noise filter across the duct.
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