Proface APL3000B - Node Box PC Uživatelský manuál stáhnout pdf (Strana 68)

Chapter 3 Installation and Wiring

3-23

3.3.2 Connecting the Power Supply

This section describes the precautions for supplying a power voltage.

• If the supplied voltage exceeds the PS-A unit’s range,

connect a constant voltage transformer.

• Between the line and ground, select a power supply

that is low in noise. If there is an excess amount of

noise, connect a insulating transformer.

• When supplying power to the PS-A unit, please

separate the input/output and power lines, as shown.

• To increase the noise resistance quality of the power

cord, it is recommended to attach a ferrite core to the

power cord.

• The power supply cable must not be bundled or

positioned close to main circuit lines (high voltage,

high current), or input/output signal lines.

• Connect a lightning surge absorber, as shown in the

diagram, to deal with power surges.

• To avoid excess noise, make the power cord as short as

possible.

SEE

2.1.1 Electrical (page2-2)

• Use constant voltage and

insulating transformers with

capacities of 200VA or more.

• Be sure to ground the surge

absorber (E1) separately from

the PS-A unit (E2).

• Select a surge absorber that has

a maximum circuit voltage

greater than that of the peak

voltage of the power supply.

Constant

Voltage

Transformer

Twisted-pair cord

PS-A Unit

Twisted-pair cord

PS-A Unit

Insulating

Transformer

Main Power

PS-A Unit

Power

Input/Output

PS-A Power

Input/Output

Unit

Main

Power

PS-A

Power

Input/

Output

Main

Circuit

PS-A Unit

Input/Output

Unit

Input/Output

Unit

Operation

Unit

Lightning Surge

Absorber

PS-A Unit

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