Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other

technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply

the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without

notice.

© 2008 Murata Power Solutions, Inc.

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Mansfield (MA), Tel: (508) 339-3000, email: sales@murata-ps.com

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Murata Power Solutions, Inc.

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Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356

www.murata-ps.com email: sales@murata-ps.com ISO 9001 and 14001 REGISTERED

www.murata-ps.com

04/07/09

DMS-20RM Series

True-rms ac Voltmeters with Isolated Inputs

MPM_DMS-20RM.A02 Page 4 of 4

Figure 3. Panel Installation

Step 2.

Step 3.

Step 4.

Step 1.

Panel Installation

All connections to DMS-20RM ac voltmeters must be made after the meter

is securely attached to the panel, with all associated ac supply power

sources de-energized (off). The installed wire positions should be such that

minimal forces are applied to terminal blocks TB1 and TB2. In high-vibration

environments, proper strain reliefs must be used for all wiring.

To ensure a secure panel-mount installation, MPS recommends using the

DMS-BZL4-C bezel assembly (with sealing gasket) supplied with each DMS-

20RM voltmeter. See the ‘Mechanical Specifications’ section for detailed

cutout and voltmeter dimensions.

Following the four-step sequence shown in Figure 3 — being careful not to

apply excessive force or twisting motions — insert the DMS-20RM into the

panel opening. When using the DMS-BZL4-C, install its sealing gasket so it

is positioned between the voltmeter’s front flange and panel front surface

(see Mechanical Specifications). Be sure to use and securely tighten all four

screws supplied with the bezel assembly.