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FEATURES
DMS-20PC-7-DCM
–36 to–75Vdc, Self-Powered LED Display,
DC Voltage Monitor
DATEL’s new DMS-20PC-7-DCM self-powered digital voltage monitor is designed
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Great for –48Vdc telecom power monitoring
Self-powered 2-wire operation
–36 to –75V operating input range
Ultra-low power consumption, 8mA (typ.) at –48V
–200V input transient protection
Reverse polarity protected to +100V
0.37?/9.4mm high, bright red, LED display
Subminiature 1.38? x 0.88" x 1.0? package
Super reliable, epoxy-encapsulated construction
–25 to +60°C operating temperature range
for monitoring –48V intermediate bus voltages in modern telecom/datacom/computer
equipment. Its compact size and low power consumption
(8mA typical) make it the ideal replacement for older, hard-
to-read, analog panel meters. Simply connect a –36 to
–75Vdc input across the two rear terminals and the meter is
fully operational!
The DMS-20PC-7-DCM’s subminiature package
(1.38? x 0.88? x 1.0?) houses a large, 0.37?/9.4mm,
bright red LED display which can be easily read from
15 feet away. Built-in reverse polarity and transient
protection assures simple, trouble-free installation.
The DMS-20PC-7-DCM employs a high-resolution, 3?
digit analog-to-digital converter and precision metal-?lm
resistors to achieve outstanding performance over its
entire operating temperature range of –25 to +60°C. A
Functional Speci?cations
rugged, epoxy-encapsulated, polycarbonate case
(available only from DATEL!) provides excellent protection
Input
Voltage Range ?
Current Consumption
Reverse Polarity Protection
Transient Protection
Performance
–36.0 to –75.0Vdc
13.0mA (max.)
+100V (max.)
–200V (1μsec duration)
against moisture, shock and vibration.
Ordering Information
Typical panel mount installation
Suggested wiring (user supplied)
Sampling Rate
Resolution
Accuracy @ +25°C
Temperature Drift
(–25 to +60°C)
2.5 readings/second
0.1V
±0.1V (typ.), ±0.2V (max.)
±0.2 counts/°C (max.)
DMS-20PC-7-DCM
DMS-20-CP
DMS-BZL3
DMS-BZL4
–36.0 to –75.0V dc voltage monitor
Panel cutout punch
Panel mount bezel assembly
Panel mount bezel with sealing gasket
Mechanical
Dimensions
Display Type
Weight
Case Material
6-32 screw torque
Environmental
Operating Temperature
Storage Temperature
Humidity (Non-condensing)
1.38" x 0.88" x 1.00"
3 digit, red LED, 0.37"/9.4mm
1 ounce (28 grams)
Polycarbonate
6-8 in-lb (0.7 – 0.9N-m)
–25 to +60°C
–40 to +75°C
0 to 95%
Brass screws (6-32 thread) and a panel-mount retaining clip are supplied with each meter
? Operation and accuracy at inputs above or below this range
are not speci?ed.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
MPM_DMS-20PC-7-DCM.B05 Page 1 of 2
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