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DMS-20PC-3-LM
Self-Powered LED Display 480V
AC Line Monitor
Power Supply Polarity, Fusing, Wiring, and Grounding: DMS-20PC-3-LM’s
ac-supply terminals are not polarity sensitive, that is, they have no “AC LO” or
“AC HI” designations. These meters do not include nor require a connection to
earth/chassis ground.
All ac-supply wiring must be rated for the voltages and currents they will
conduct and comply with any code or application-mandated requirements
pertaining to the user’s speci?c installation. 600V UL rated wire suitable for the
intended application is required.
DMS-20PC-3-LM ac voltmeters are not internally fused. The rear threaded
Dimensions in inches (millimeters)
Tolerances: 2 PL Dec ±0.02 (±0.51)
3 PL Dec ±0.010 (±0.254)
Recommended panel cutout dimensions:
1.336 (33.93)W × 0.838 (21.29)H
Internal corner radii 0.032 (0.81) Max.
standoff input-terminals are to be used only for powering the voltmeter’s
internal circuitry; they must not be used to supply power to external loads. The
supply wires feeding these voltmeters must be fused with a 0.25A/600V time
delay/time lag fuse, in accordance with applicable regulatory codes.
The recommended wire size is 16AWG to 20AWG (1.31mm 2 to 0.52mm 2 )
stranded copper wire. Wires must be properly stripped and attached to the
threaded standoffs such that their insulation is not pinched by the supplied
6-32 screws. Rated tightening torque for the 6-32 screws is 7 to 8 pound-
inches (0.8 to 0.9N-m).
1.30
(33.0)
0.04
(1.016)
#6-32
UNC THD
0.04
(1.016)
0.04
(1.016)
1.38
(35.1)
0.44
(11.2)
0.80
(20.3)
0.88
(22.4)
0.37
(9.4)
0.75
(19.1)
0.32
(8.1)
1.00
(25.4)
#2-56 INSERT
0.156 (3.96) DEEP
0.19
(4.8)
1.07
(27.2)
0.10
DMS-BZL3-C
Optional Bezel
1.63 (41.4)
1.28
(32.5)
0.10
(2.5)
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mans?eld, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
(2.5)
1.83 (46.5)
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. Speci?cations are subject to change without
notice. ? 2012 Murata Power Solutions, Inc.
www.murata-ps.com/support
MPM_DMS-20PC-3LM_D07 Page 2 of 2
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