Basic Installation Procedure - GE 90-30 PLC Series Installation And Hardware Manual

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Basic Installation Procedure

Note:
The system design, which includes producing the layout and wiring drawings, should be completed
before beginning the installation procedure. This section offers a basic step-by-step approach to
installing a Series 90-30 PLC system. Some steps refer to earlier sections of this chapter for
additional details. An attempt was made to place the steps in an order that will make the process as
efficient as possible. However, due to the wide variance in system designs, this order may not be
the most efficient for your system, so you may wish modify this procedure to fit your needs.
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2-28 Series 90-30 PLC Installation and Hardware Manual – August 2002
Series 90-30 PLCs must be mounted in a protective enclosure. The enclosure should be
capable of properly dissipating the heat produced by all of the devices mounted inside it.
For details on calculating heat dissipation, refer to Appendix F.
Gather the schematics, layouts, prints, and other information for the job.
To avoid the possibility of electrical shock to personnel or damage to your
PLC, we recommend that you shut off all power to the system before
mounting and wiring the PLC. Also, keep all electronic components away
from the area while drilling and tapping to keep metal chips and filings out
of these sensitive components.
From the layout drawing, determine where the baseplate(s) will be mounted. Lay out the hole
locations, either using the dimensions given on your layout drawing or from the "Baseplates"
chapter of this manual.
Mark the hole locations for the baseplate safety ground wire (see "Baseplate Safety Ground" in
this chapter).
Mark the hole locations for module shield ground connections (if any). See "Module Shield
Ground" (and accompanying sections) in this chapter for instructions.
Finish laying (marking hole locations) out the rest of the system. This includes any terminal
blocks you will be using. DIN-rail mounted terminal blocks for some of the 32-point I/O
modules are manufactured by Weidmuller. DIN-rail mounted GE Terminal Block
Quick Connect (TBQC) assemblies are optional for some of the 16-point and 32-point discrete
I/O modules. If using these TBQCs, refer to Appendix H for data. Also, APM and DSM
modules use DIN-rail mounted terminal blocks.
We recommend drilling and tapping all holes before mounting any components.
This will avoid getting chips and filings in the components.
Drill and tap the marked holes. For baseplate mounting, use 8-32 or 4mm size.
Mount the baseplates. Use good quality 8-32 x 1/2 inch or 4 x 12mm size screws. We
recommend using star lock washers and flat washers under the screw heads (star lock washer
should be located between screw head and flat washer) to ensure a tight baseplate ground
connection, and to keep the screws from loosening. Connect each baseplate ground wire as
shown in the "Baseplate Safety Ground" section of this chapter.
If you have Expansion or Remote racks, determine the correct rack number for each one, then
set the rack numbers using the Rack Number Selection dual in-line package (DIP) switch on
Warning
Note
GFK-0356Q