ACA-20RM-ALM Datasheet, PDF (4/5 Pages) Murata Power Solutions Inc. – True-rms-AC Ammeters with Alarm Function

PANEL INSTALLATION
All connections to ACA-20RM-ALM 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 current transformer 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 recom-
mended that adequate strain reliefs be used for all wiring.
Using Figure 4 as a guide, carefully insert the bezel/color filter assembly
into the panel opening. From the rear of the panel, install the four round
ACA-20RM-ALM Series
True-rms-AC Ammeters with Alarm Function
plastic standoffs over the bezel’s threaded studs. Install the ACA-20RM-
ALM 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 substitute 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.
Gasket
Bezel
PANEL
Standoff
Nut
0.032 (0.8) Thick
Gasket
ACA-20RM
AC Ammeter
Standoff
0.190 (4.83)
SIDE VIEW
BEZEL AND PANEL CUTOUT
FRONT VIEW
0.187
(4.75)
Figure 4. Panel Installation
0.55
(13.97)
RECOMMENDED DRILL AND
PANEL CUTOUT DIMENSIONS
INTERNAL CORNER RADII:
0.032 (0.81) MAX.
0.116 (2.95)
1.280
(32.51)
1.07
(27.18)
0.838
(21.29)
1.826 (46.38)
1.336 (33.93)
1.626 (41.30)
0.093 (2.362) DIAMETER (4 REQUIRED)
0.145 (3.68)
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MPM_ACA-20RM-ALM.A01 Page 4 of 5