AMCI NEXUS NX2A4E2, User Manual

Page: 32 / 76

I
NSTALLING THE
NX2A4E2
NX2A4E2 User Manual
ADVANCED MICRO CONTROLS INC.
32
1.2 General Wiring Guidelines (continued)
1.2.2 Grounding

All ground connections must be permanent and continuous to provide a low-impedance path to earth
ground for induced noise currents.

The chassis of the NX2A4E2 must be connected to chassis ground through a grounding wire connected
to the ground connection of the power supply connector.

Any sensor or power supply that is attached to the NX2A4E2 must be connected to the same chassis
ground as the unit to avoid ground loops.

All isolation transformer secondary windings must be grounded to the same earth ground as the
machine ground.
1.2.3 Surge Suppression

Surge suppression devices should be placed across the coil of an inductive device to reduce the effects
of high voltage transients (i.e., varistors, diodes, etc.). This includes any inductive load that is powered
by the same supply used to power the NX2A4E2 or its sensors.
1.2.4 Mounting
If mounting an NX2A4E2 on an enclosure door, do not rely on the hinge to make an electrical connection
between the door and the enclosure. A bonding wire from the door to the rest of the enclosure must be
installed.
When mounting an NX2A4E2 on DIN Rail, the included plastic DIN rail brackets will electrically isolate the
unit. A grounding wire must be run from the grounding pin on the power connector to an earth ground point.
1.3a DIN Rail Mounting
Follow these instructions when mounting an NX2A4E2 on DIN rail.
1.3a.1 DIN Rail Installation
NX2A4E2 modules can be mounted on EN 05 022 or EN 05 035 DIN Rail. The DIN Rail must be securely
mounted to a panel and solidly grounded before the unit is installed. Grounding is usually accomplished
through the mounting hardware, by first removing any paint or other material from all surfaces that may inter-
fere with proper grounding. Another option is to install a heavy gauge wire from the DIN rail to your system’s
ground bus.
1.3a.2 Attach the DIN Brackets
Figure T1.1 shows how to install the included DIN brackets so that the NX2A4E2 can be mounted on

EN 50 022 or EN 50 035 rail. Note that the bottom view of the unit is shown. The rear view is similar and the
brackets are installed in the same fashion.
Figure T1.1 Attaching DIN Brackets
1) Remove a DIN bracket, two #8 screws, and two #8
lock washers from the mounting kit bag.
2) Slide the DIN bracket onto the unit.
3) Install the two #8 screws and lock washers to secure
the bracket on the unit.
4) Repeat on the other side.
BOTTOM VIEW OF NX2A4E2
(INCOMPLETE)
BACK VIEW IS SIMILAR