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AT6200/AT6400 Installation Guide
1.
Mount the Auxiliary Box to the surface of the
enclosure. Cover any exposed bare metal with
petroleum jelly to resist corrosion.
2.
Connect the high-density cable to the AT6n00 and to
the mating connector at the top of the Auxiliary Box.
Prepare the panel cut-out per the instructions in the
Required Hardware section.
3.
Install the clam-shell clamp per the instructions in the
Required Hardware section.
4.
Install a snap-on ferrite absorber on the high-density
cable within 2 inches (50 mm) of the connection to
the AT6n00 card.
5.
Install a snap-on ferrite absorber on the high-density
cable within 2 inches (50 mm) of the clam-shell
clamp, outside of the enclosure.
Filtering the AC Supply
I n t r o d u c t i o n
These instructions are based on the use of proprietary
screen filter units which are readily available. However, the
full EMC test includes a simulated lightning strike which
will damage the filter unless adequate surge suppression
devices are fitted. These are not normally incorporated into
commercial filters since the lightning strike test can be
destructive. This test is normally carried out on the overall
system and not on individual components; therefore, the
surge protection should be provided at the system
boundary.
A filter must be installed between the incoming AC
supply and the input to the Auxiliary Box. The
manufacturer’s part numbers for suitable filters are:
Corcom 3EB1
Corcom World Headquarters
Phone: 847-680-7400
Fax: 847-680-8169
Schaffner FN610-3/06
Schaffner EMC Inc.
Phone: 201-379-7778
Fax: 201-379-1151
Mount the filter within 2 inches (50mm) of the Auxiliary
Box of the AT6n00, as shown in Figure 5 below. Ensure
that there is no paint on the mounting panel under the
filter mounting lugs—it is vital that there is good large-
area contact between the filter and the panel.
Connect the incoming AC supply cable to the push-on
terminals on the filter, with the earth lead connected to a
local earth stud, bus bar or metal back-plane. Route the
supply cable so that it runs close to the walls of the
enclosure. Connect the earth terminal on the filter case to
the earth stud.
Take the earth connection for the Auxiliary Box of the
AT6n00 from the same stud that retains the filter case
earth, as shown in Figure 5 below.
Control Signal Connections
High-quality braided screen cable should be used for
control connections. In the case of the AT6n00, which has
differential step-direction inputs, it is preferable to use a
cable with twisted pairs to minimize magnetic coupling.
No connection is made to the cable screen at the Auxiliary
Box itself. Fit a ferrite absorber close to the I/O connector
and run the cable down to the mounting panel as shown in
Figure 5. Expose a short length of the braided screen and
anchor to the panel with a P-clip.
The level at which the I/O operates means that the signals
are unlikely to meet EMC immunity requirements if taken
outside the enclosure without proper screening.
50-Pin Ribbon Cable: It is recommended when using the
50-Pin Ribbon Cable I/O found on the Auxiliary Box of
the AT6n00 that a terminal break out box such as the
VM50 be used (see Figure 5). Mount the VM50 close to
the Auxiliary Box, keeping the ribbon cable as short as
possible. Bundle any excess ribbon cable and secure close
to a panel wall. Individual I/O points will require the use
of individually shielded cable runs, with braids bonded to
the panel (close to VM50) with a P-clip.
Remember to route control signal connections well
away (at least 8 inches) from relays and contactors.
Control wiring should not be laid parallel to power or
motor cables and should only cross the path of these
cables at right angles. Bear in mind that control cables
connected to other equipment within the enclosure may
interfere with the controller, particularly if they have come
from outside the cabinet. Take particular care when
connecting external equipment with the cabinet door open,
for instance a computer or terminal; static discharge may
cause damage to unprotected inputs.
Feedback Cables
Feedback devices such as encoders also require the use of
high-quality braided screen cable. If it is necessary to
replace the standard feedback cable, select a braided screen
cable that matches the gage of the devices original cable
and attach as close to the transducer as possible. Avoid
complex and bulky connections that can cause degradation
in feedback signal quality. If possible, use in-line cable
splicing techniques, and cover the splice point with heat-
shrink tubing. Remove a section of the braided shield
cable’s insulation to expose the braid, and tie the braid to
earth using the same P-clip 360
°
bond as shown in Figure
2. Differential signals should use twisted pair cable to
minimize magnetic coupling. At the receiving end, fit a
ferrite absorber over the feedback cable before wiring the
connector, then P-clip the braid to a suitable ground (metal
back-plane of drive mounting panel, or earth point of
device that receives the feedback)— see Figure 5.
Servicing the AT6n00
Changing Firmware: Only skilled or trained personnel
should change firmware.
Do Not Replace Fuses: The AT6n00 has no fuses
designed to be replaced by the user. Fuse failure indicates
that other components have also failed. Fuses and other
components should only be replaced by Compumotor or
its designated repair facilities.
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