Rockwell Automation 1785-LTx,D17856.2.1 Classic PLC-5 Programmable Controllers Users Manual - Manual (Page 25)

Choosing Hardware
Chapter 2
2-6
An I/O chassis is a single, compact enclosure for the processor,
power-supply modules, remote and extended-local I/O adapter modules,
and I/O modules. The left-most slot of the I/O chassis is reserved for the
processor or adapter module. Consider the following when selecting
a chassis:
When you determine the maximum number of I/O in your application,
allow space for the I/O slots dedicated to power-supply modules,
communication modules, and other intelligent I/O modules.
You must use series B or later chassis with 16- and 32-point
I/O modules.
Allow space for future addition of I/O modules to chassis.
I/O chassis available are:
4-slot (1771-A1B)
8-slot (1771-A2B)
12-slot—rack mount (1771-A3B), panel mount (1771-A3B1)
16-slot (1771-A4B)
You can also choose a chassis with an integral power supply and remote
I/O adapter (show at left). The two types are:
1-slot (1771-AM1)
2-slot (1771-AM2)
PanelView and ControlView are operator interface products or packages
that communicate with a PLC-5 processor. Use Table 2.G as a guideline
when selecting either PanelView or ControlView for your PLC-5
programmable controller system. Use Table 2.H for a comparison of
PanelView and ControlView features.
Selecting I/O Chassis
4-Slot
1771ĆA1B
1771ĆAM1
1771ĆAM2
Selecting an Operator
Interface