User Manual

3–2 Addressing Modes for Your I/O
Publication 1771-6.5.124 – August 1997
I/O groups are made up of I/O terminals (Figure 3.1). An I/O group
is an addressing unit that can contain up to 16 input terminals and 16
output terminals. You select an I/O chassis to have either 2-slot,
1-slot or 1/2-slot I/O groups.
Figure 3.1
An I/O Group - Up to 16 Input T erminals and 16 Output T erminals
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2-slot I/O Group 1-slot I/O Group
I/O racks are made up of I/O groups (Figure 3.2). An I/O rack is an
addressing unit that can contain up to eight I/O groups.
Figure 3.2
An I/O Rack - Up to Eight I/O Groups
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01234567
Power Source Not Indicated