Power Board Mounting - DCS 090 Series Reference Manual

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Front Panel Trim
The preferred method of trimming the front panel is a lexan overlay with a clear window through
which the LED display can be read. A frosted window will noticeably blur the display digits,
though not usually enough to make them unreadable.
The area on the overlay above the two switches can be marked with just a button shaped graphic
to indicate where to press, or a raised button can be embossed. In any case the front panel hole
through which the switch shafts protrude should be at least a half inch in diameter and burr free
to allow the overlay to travel the required (up to) .027 inch into the front panel to actuate the
switch without chafing the overlay material.
Be sure to specify no adhesive on the back of the overlay in the button area.
Mechanical dimensions of the main ECB are shown in Figure 6.
Figure 6: Main ECB Mechanical Dimensions (in inches)

Power Board Mounting

This section discusses various issues related to mechanically mounting the power board in the
equipment to be controlled.
Mechanical Attachment
The power ECBs are intended to be attached to their mounting surface with the metal flange that
forms the bottom of the triac assembly. The mounting flange is electrically isolated and can be
directly attached to any surface.
There are two mounting holes in the flange. One is on the portion of the mounting flange that
extends past the perimeter of the circuit board, the other is accessible through a large hole in the
circuit board near the power connection tabs. Use of #6 hardware (or equivalent) is
recommended for mounting the power ECB, though #4 can be used for low to moderate current
applications.
2/21/05
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090 Series Reference Manual
Digital Control Systems Page: 14