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DMS-20ACV Series

480V, Self-Powered, AC Line Monitor

MPM_DMS-20ACV.B02 Page 3 of 4

PANEL INSTALLATION

BEZEL AND PANEL CUTOUT

All electrical connections to DMS-20ACV must be made after the voltmeter

is securely attached to the panel, and with the input AC supply voltage

de-energized (off). Care must be exercised when attaching the AC supply

wires to terminal block TB1. The installed wire-positions should be such

that minimal forces are applied to TB1 or the voltmeter. In high-vibration

environments, adequate strain reliefs must be used on all supply wiring.

Using Figure 2 as a guide, carefully insert the bezel/color filter assembly

into the panel opening. From the rear of the panel, install the four 8mm

plastic standoffs over the bezel’s threaded studs. Install the DMS-20ACV

pc-board assembly and attach and tighten the four #2-56 hex nuts over the

threaded studs. Tighten each hex nut to 15 to 20 ozf-in (0.11 to 0.14 N-m).

Figure 2. Panel Installation

Use only the factory-supplied hardware as the use of substitute hardware

may result in an unsafe installation and/or adversely affect the reliability of

the installation.

The range of panel thicknesses that can be accommodated with the

factory supplied hardware is 0.040 inches (1.0mm) to 0.125 inches

(3.2mm). Panel thicknesses greater than 3.2mm may require additional

user-supplied hardware or modifications to achieve an electrically safe and

mechanically secure installation. However, do not use any substitutes for

the 8mm round plastic standoffs supplied with the voltmeter. Please note,

thick panels will alter the readability of the LED display.