Hardware manual

UC-7112-LX Plus/UC-7112/UC-7110 Hardware Hardware Connection Description
3-2
Wiring Requirements
This section explains how to connect the UC-71xx embedded computers to serial devices.
You should heed the following safety precautions before installing any electronic device:
• Use separate paths for power wiring and wiring for devices. If power wiring and device wiring paths must
cross, make sure the wires are perpendicular at the intersection point.
NOTE: Do not run signal or communication wiring and power wiring in the same wire conduit. To avoid
interference, wires with different signal characteristics should be routed separately.
• Use the type of signal transmitted through a wire to determine which wires should be kept separate. The
rule of thumb is that wiring that shares similar electrical characteristics can be bundled together.
• Keep input wiring and output wiring separate.
• It is advisable to label the wiring to all devices in the system.
ATTENTION
Safety First!
Be sure to disconnect the power cord before installing and/or wiring your UC
-71xx embedded computer.
Wiring Caution!
Calculate the maximum possible current in each power wire and common wire. Observe all electrical codes
dictating the maximum current allowable for each wire size.
If the current goes above the maximum ratings, the wiring could
overheat, causing serious damage to your
equipment.
Temperature Caution!
Be careful when handling
the UC-71xx embedded computer. When plugged in, the computer’s internal
components generate heat, and consequently the outer casing may feel hot to the touch
.
Connecting the Power
Connect the “live-wire” end of the 12-48 VDC power adaptor to the UC-71xx’s terminal block. If the power is
supplied properly, the “Ready” LED will glow a solid green color after a 25 to 30 second delay.
Grounding the UC-71xx Embedded Computers
Grounding and wire routing help limit the effects of noise due to electromagnetic interference (EMI). Run the
ground wire from the ground screw to the grounding surface prior to connecting devices.
ATTENTION
This product s
hould be mounted on a well-grounded mounting surface such as a metal panel.
SG:
The
Shielded Ground
(sometimes called Protected Ground) contact
is the left most contact of the 3
-pin power terminal block connector
when viewed fro
m the angle shown in the figure at the left
. Connect
the SG wire to an appropriate grounded metal surface.