M251 Logic Controller Mounting Positions and Clearances

Introduction

This section describes the correct mounting positions for the M251 Logic Controller.

NOTE: Keep adequate spacing for proper ventilation and to maintain the operating temperature specified in the Environmental Characteristics.

Correct Mounting Position

To obtain optimal operating characteristics, the M251 Logic Controller should be mounted horizontally on a vertical plane as shown in the figure below:

Acceptable Mounting Positions

The M251 Logic Controller can also be mounted vertically on a vertical plane as shown below.

NOTE: Expansion modules must be mounted above the controller.

Incorrect Mounting Position

The M251 Logic Controller should only be positioned as shown in the Correct Mounting Position figure. The figures below show the incorrect mounting positions.

Minimum Clearances

 WARNING
UNINTENDED EQUIPMENT OPERATION
  • Place devices dissipating the most heat at the top of the cabinet and ensure adequate ventilation.
  • Avoid placing this equipment next to or above devices that might cause overheating.
  • Install the equipment in a location providing the minimum clearances from all adjacent structures and equipment as directed in this document.
  • Install all equipment in accordance with the specifications in the related documentation.
Failure to follow these instructions can result in death, serious injury, or equipment damage.

The M251 Logic Controller has been designed as an IP20 product and must be installed in an enclosure. Clearances must be respected when installing the product.

There are 3 types of clearances to consider:

  • The M251 Logic Controller and all sides of the cabinet (including the panel door).

  • The M251 Logic Controller terminal blocks and the wiring ducts to help reduce potential electromagnetic interference between the controller and the duct wiring.

  • The M251 Logic Controller and other heat generating devices installed in the same cabinet.

The following figure shows the minimum clearances that apply to all M251 Logic Controller references: