Proface APL3000B - Node Box PC Uživatelský manuál stáhnout pdf (Strana 69)

PS-3650A/PS-3651A Series Hardware Manual

3-24

3.3.3 Grounding

This section describes the precautions for grounding the PS-A unit.

• When supplying power to the PS-A unit, be sure to

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

[diagram (a)]

• If exclusive grounding is not possible, use a common

connection point. [diagram (b)]

3.3.4 I/O Signal Line Placement

• Input and output signal lines must be separated from the power control cables for operating circuits.

• If this is not possible, use a shielded cable and ground the edge of the shield.

Do not use common grounding, since it can lead to an accident or machine breakdown.

• Check that the grounding

resistance is 100Ω or less.

• FG and SG terminals are

internally connected in the PS-A

unit. When connecting an

external device to the PS-A unit

using the SG terminal, be sure

to check that no short-circuit

loop is created when you setup

the system.

• The grounding wire should have

a cross sectional area of 2mm

or greater. Create the

connection point as close to the

PS-A unit as possible, and make

the wire as short, as possible.

When using a long grounding

wire, replace the thin wire with a

thicker wire, and place it in a

duct.

• If the equipment does not function properly when grounded, disconnect the ground wire from the FG

terminal.

(a) Exclusive Grounding (BEST)

(b) Common Grounding (OK)

(c)Common Grounding (Not OK)

PS-A Unit Other

Equipment

PS-A Unit Other

Equipment

PS-A Unit Other

Equipment

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