Allen-Bradley PLC-5 User Manual page 38

3-2 Placing System Hardware
Minimum spacing requirements for a
controller-resident chassis:
Mount the I/O chassis horizontally.
Allow 153 mm (6 in) above and below the chassis.
Allow 102 mm (4 in) on the sides of each chassis.
Allow 51 mm (2 in) vertically and horizontally between
any chassis and the wiring duct or terminal strips.
Leave any excess space at the top of the enclosure,
where the temperature is the highest.
Minimum spacing requirements for a remote
I/O and extended-local I/O chassis:
Mount the I/O chassis horizontally.
Allow 153 mm (6 in) above and below all
chassis. When you use more than one
chassis in the same area, allow 152.4 mm (6
in) between each chassis.
Allow 102 mm (4 in) on the sides of each
chassis. When you use more than one
chassis in the same area, allow 101.6 mm (4
in) between each chassis.
Allow 51 mm (2 in) vertically and horizontally
between any chassis and the wiring duct or
terminal strips.
Leave any excess space at the top of
the enclosure, where the temperature is
the highest.
Publication 1785-UM012D-EN-P - July 2005
102mm
(4")
51mm(2")
102mm
153mm (6")
102mm
(4")
Area reserved for disconnect,
transformer, control relays, motor
starters, or other user devices.
51mm
153mm
(2")
(6")
153mm Wiring Duct
(6")
Area reserved for disconnect,
transformer, control relays, motor
starters, or other user devices.
(4")
51mm (2")
51mm (2")
102mm
(4")
153mm (6")
102mm
(4")
13081
153mm
(6")
Wiring Duct
Wiring Duct
18749