Bradley Smoker PLC-5 user manual Placing System Hardware, Acceptable Range

Chapter 3

Placing System Hardware

Using This Chapter

For Information About	Go to Page
Determining the proper environment	3-1
Protecting your controller	3-3
Avoiding electrostatic damage	3-3
Laying out your cable raceway	3-4
Laying out your backpanel spacing	3-5
Grounding your system	3-6

Determining the Proper Environment

Place the controller in an environment with conditions that fall within these guidelines:

Environmental Condition	Acceptable Range
Operating temperature	0 to 60° C (32 to 140° F)
Storage temperature	-40 to 85° C (-40 to 185° F)
Relative humidity	5 to 95% (without condensation)

Separate your programmable controller system from other equipment and plant walls to allow for convection cooling. Convection cooling draws a vertical column of air upward over the controller. This cooling air must not exceed 60° C (140° F) at any point immediately below the controller. If the air temperature exceeds 60° C, install fans that bring in filtered air or recirculate internal air inside the enclosure, or install air-conditioning/heat-exchanger units.

To allow for proper convection cooling in enclosures containing a controller-resident chassis and remote I/O chassis, follow these guidelines.

Publication 1785-UM012D-EN-P - July 2005