As seen on The Automation Minute earlier this week, the MicroLogix 1200 comes with an extensive installation document. That document is also available electronically on the manufacturer's website HERE.
While these “installation instructions” cover many different topics, in this blog article I'll be focusing on the installation and mounting of the controller.
To allow for installation in the widest temperature range possible, the MicroLogix 1200 programmable controller is vented on the top, bottom, and left side. This venting is for convection cooling of the internal circuits of the controller. In order to allow sufficient air to flow through the vents, you need to allow for two inches of spacing all around the unit.
The MicroLogix 1200 should also only be mounted horizontally. And when mounting a MicroLogix 1200 controller, it is very important not to allow any debris to fall inside the unit's vents. Metal filings or wire strands which fall into the MicroLogix can damage or destroy it's internal circuits.
To aid in avoiding such occurrences, the MicroLogix 1200 comes equipped with a protective debris strip installed on the top of the unit. This strip should not be removed until after the MicroLogix 1200 is installed, and all wiring and drilling above the unit is completed.
However, the MicroLogix should also not be powered on while the protective strip is installed. If this caution is not followed, the controller's circuits could overheat and become permanently damaged.
While most installations will find the MicroLogix 1200 mounted to a din rail, four mountings holes are also provided for surface mounting. When used, the mounting holes are typically utilized to mount the Micro directly to the backpanel of an electrical enclosure. To aid in these surface mounting installations, the product's Installation Instructions includes a “mounting template” to help in spacing mounting holes accurately.
Well, that's in for today's article reviewing the installation and mounting of a MicroLogix 1200 programmable controller. For more information about installing the MicroLogix 1200, you can find the complete manufacturer's installation instructions HERE.
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