From Successful Instrumentation and Control Systems Design


Panel arrangement drawings depict equipment that is mounted on back panels inside electrical enclosures and show any front-panel penetrations. These arrangements accomplish several things:

  • They convey construction detail about the contents and placement of front-panel equipment such as control switches and lights.

  • They convey construction detail about the contents and placement of back-panel equipment.

  • They show the placement and contents of any engraved labels.

  • They provide a bill of materials for each item in the panel that must be purchased.

  • They allow the external enclosure (i.e., "the can") to be sized with confidence.

The anatomy of the drawing is very simple. It should show a graphic of the panel, usually on the left side, and a bill of materials, usually on the right. It is strictly a physical drawing showing the relative locations of the items in the panel. Graphic detail should be minimized, and no wiring detail need be included. Usually, a general "not to scale" arrangement is sufficient provided the designer is sure that any potential conflicts have been identified and scrutinized and any front-panel penetrations have been sufficiently detailed.

A Procedure

One quick initial design method for creating these drawings uses Microsoft Excel as a design aid. Following is a procedure for turning your Microsoft Excel spreadsheet software into a design tool:

  1. Turn the spreadsheet into a sheet of graph paper

    1. Open a new spreadsheet and click on the blank cell at the junction of the row labels and column labels. This selects the entire spreadsheet...

Copyright ISA — The Instrumentation, Systems, and Automation Society 2004 under license agreement with Books24x7

Products & Services
Shipping and Handling Labels
Shipping and Handling Labels are preprinted labels that identify proper handling directions and in some cases destination information. These labels may indicate contents of package such as Flamability or Fragile or they may indicate directions for handling.
Graphic Overlay and Front Panel Services
Graphic Overlay and Panel Overlay Services involve the design and or manufacture of printed or marked panels for instruments and other equipment requiring identification, instructions and other graphics for control devices.
Computer-Aided Design (CAD) Services
Computer-aided design (CAD) services assist in the computerized design, three-dimensional (3D) modeling, and printing and drafting of engineering components and assemblies.
Touch Switches and Tactile Switches
Touch switches and tactile switches operate by touching or pressing to make a connection. Touch switches are touch-operated devices that do not have moving parts. Tactile switches are electromechanical and provide tactile feedback.
Energy Management Software
Energy management software is designed to help manage energy usage and utility bills.

Topics of Interest

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