EM-1220 LX User’s Manual
Introduction
Wiring Requirements
This section describes how to connect the EM-1220-LX to serial devices.
Be sure to heed the following common safety precautions before proceeding with the installation
of any electronic device:
y
Use separate paths to route wiring for power and 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.
y
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.
y
Keep input wiring and output wiring separate.
y
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 the EM-1220-LX embedded
module and/or the EM-1220-DK carrier board.
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 EM-1220-LX and/or the EM-1220-DK. When plugged in, the
EM-1220-LX’s and/or the EM-1220-DK’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 terminal block of
EM-1220-DK carrier board. If the power is properly supplied, the “Ready” LED will glow a solid
green after a 25 to 30 second delay.
Grounding the EM-1220-DK Carrier Board
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.
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