Chapter 3 Baseplates; Baseplate Types; Common Baseplate Features - GE 90-30 PLC Series Installation And Hardware Manual

Baseplates
Chapter
3

Baseplate Types

A baseplate is composed of three main parts: (1) a circuit board mounted to (2) a metal back-plate
with (3) a plastic cover. The circuit board, called the "backplane," contains sockets for plug-in
modules. The metal back-plate has four holes for mounting the baseplate, and retainers for
mounting the modules. The plastic cover provides protection for the circuit board, slotted holes for
the module connectors and retainers, and printed labels such as the baseplate description, serial
number, and slot number labels. There are three basic types of baseplates discussed in this chapter:

Common Baseplate Features

The following figure shows the features that are common to all Series 90-30 baseplates. Note that
a modular CPU baseplate is shown.
GFK-0356Q
CPU
Expansion
Remote
3-1