GE Series 90-30 PLC

2-8 Series 90-30 PLC Installation and Hardware Manual – August 2002 GFK-0356Q
2
Baseplate Mounting
Warning
Be sure to follow baseplate grounding instructions in this chapter. Failure to
properly ground the PLC can result in improper operation, damage to
equipment, and injury to personnel.
Mounting a Baseplate to a Panel
■ Use four good-quality 8-32 x 1/2 (4 x 12mm) machine screws, lock washers and flat washers.
Install the screws in four tapped holes. The “Baseplates” chapter has the applicable
dimensions and mounting clearances. Alternately, 10-slot baseplates can be mounted in
standard 19-inch racks by using the appropriate adapter. This is also discussed in the
“Baseplates” chapter.
■ A vertical mounting orientation is preferred for maximum heat dissipation. Other mounting
orientations will require derating the Power Supply current capabilities. See Chapter 12,
“System Design,” for details.
■ All baseplates must be grounded. The “Baseplate Safety Grounding” section of this chapter
has details.
■ The Rack Number Selection switch must be set on each Expansion or Remote baseplate. A
CPU baseplate does not require this switch. Rack numbers should be assigned by the system
designer. Failure to set the Rack Number Selection switches properly will result in system
malfunction. See the “Baseplates” chapter for details on setting these switches.
Mounting a Baseplate to a 19" Rack
Two optional Baseplate Adapter Brackets allow a 10-slot baseplate to be mounted in a 19 inch
rack. Each baseplate installation requires only one of the adapter brackets.
■ IC693ACC308 Front Mount Adapter Bracket. Used to mount a baseplate to the front face
of a 19” rack. Install the adapter bracket by inserting the tabs at the top and bottom of the
adapter bracket into the corresponding slots at the top and bottom of the plastic baseplate
cover. NOTE: Although Figure 2-7 shows the plastic baseplate cover removed, this is for
illustration purposes only. It is not necessary to remove the cover to install the bracket. With
the bracket in place, insert and tighten the two screws (included with the bracket) through the
back of the baseplate holes into the threaded holes in the bracket.