Chapter 1. Installation
1 9
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 330
W
and 2.2K
W
, 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
5V
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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