Moxa Technologies EM-1240-LX - Manual (Page 13)

EM-1240-LX User’s Manual Introduction
1-9
ATTENTION
Safety First!
Be sure to disconnect the power cord before installing and/or wiring your EM-1240-LX.
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-1240-LX. When plugged in, the EM-1240-LX’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 adapter to the EM-1240-LX’s terminal block.
If the power is properly supplied, the “Ready” LED will glow a solid green after a 25 to 30 second
delay
.
Grounding the EM-1240-LX
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 should be mounted to a well-grounded mounting surface such as a metal panel.
V+ V-
SG
12-48V
SG : The Shielded Ground (sometimes called
Protected Ground) contact is the left most contact
of the 3-pin power terminal block connector when
viewed from the angle shown here. Connect the
SG wire to an appropriate grounded metal surface.
Connecting Data Transmission Cables
This section describes how to connect the EM-1240-LX to the network, serial devices, and serial
COM terminal.