FRONT VIEW

1.280

(32.51)

0.187

(4.75)

RECOMMENDED DRILL AND

PANEL CUTOUT DIMENSIONS

1.826 (46.38)

0.838

(21.29)

1.626 (41.30)

1.07

(27.18)

INTERNAL CORNER RADII:

0.032 (0.81) MAX.

0.093 (2.362) DIAMETER (4 REQUIRED)

0.116 (2.95)

1.336 (33.93)

0.145 (3.68)

0.55

(13.97)

MPM_ACA5-20RM.A01 Page 4 of 5

ACA5-20RM Series

True-rms-AC Ammeters with 5A CT Inputs

www.murata-ps.com

PANEL INSTALLATION

BEZEL AND PANEL CUTOUT

All connections to ACA-20RM Series ammeters must be made after

the ammeter is securely attached to the panel and with all associated

load and supply voltages de-energized (off), using extreme caution and

observing all safety measures applicable to the user’s installation.

Care should be exercised when passing conductors through the amme-

ter’s built-in toroid sensor L1. The installed wire-positions should be such

that minimal mechanical forces are applied to L1, TB1, or to the ammeter

itself. In high-vibration environments, it is strongly recommended that

adequate strain reliefs be used for all wiring.

Using Figure 3 as a guide, carefully insert the bezel/color filter assembly

into the panel opening. From the rear of the panel, install the four round

Figure 3. Panel Installation

plastic standoffs over the bezel’s threaded studs. Install the ACA5-20RM

pc-board assembly as shown and then attach and securely tighten all

four hex nuts. Use only the factory-supplied hardware as the use of sub-

stitute hardware could result in an unsafe installation and/or adversely

affect the reliability of the ammeter.

The recommended range of panel thickness that can be used with the

supplied hardware is 0.040 inches (1.0mm) to 0.125 inches (3.2mm).

Panel thickness outside of this range will require additional user-supplied

hardware or modifications.

SIDE VIEW

Bezel

Gasket

Standoff

Nut

ACA5-20RM

AC Ammeter

PANEL

Gasket

Standoff

0.190 (4.83)

0.032 (0.8) Thick