ATech Machine ZETA-02 A Guia de Instalação descarregar pdf (Página 25)

Chapter 1. Installation 19

Lengthening I/O Cables

Bear in mind that lengthening cables increases noise sensitivity. (The maximum length of

cables is ultimately determined by the environment in which the equipment will be used.)

If you lengthen the cables, follow the precautions below to minimize noise problems.

¥ Use a minimum wire size of 22 AWG.

¥ Use twisted pair shielded cables and connect the shield to a SHLD terminal on the

ZETA6104. Leave the other end of the shield disconnected.

¥ Do not route I/O signals in the same conduit or wiring trays as high-voltage AC wiring

or motor cables.

Reducing noise on limit, trigger, and P-CUT inputs. If you are experiencing

noise problems, try adding resistors to reduce noise sensitivity (see illustration below).

Long Shielded Cable

Add a resistor between the input and the power supply (this will lower

the input impedance and reduce noise sensitivity). Use a value

between 330W and 2.2KW, depending on noise suppression required.

OPTIONAL

External Power Supply

(5-24VDC)

Output Device,

Switch, etc.

Input Terminal

GND

Shield

ZETA6104

Power Supply Options

V_I/O

AUX-P

Isolated

Ground

Earth

You must use either the on-board +5V

terminal or an external power supply to

power the AUX-P pull-up resistor (for the

P-CUT, HOM, NEG, POS, TRG-A, and

TRG-B inputs). Connecting AUX-P to the

+5V terminal and an external supply will

damage the ZETA6104.

Terminal could be:

P-CUT,

HOM, NEG, POS,

TRG-A, or TRG-B

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ATech Machine ZETA-02 A Guia de Instalação Página 25