DMS-EB-AC/DC-C Murata Power Solutions Inc, DMS-EB-AC/DC-C Datasheet

DMS-30 AC-Power Appl. Board

DMS-EB-AC/DC-C

Manufacturer Part Number
DMS-EB-AC/DC-C
Description
DMS-30 AC-Power Appl. Board
Manufacturer
Murata Power Solutions Inc
Datasheet

Specifications of DMS-EB-AC/DC-C

Lead Free Status / RoHS Status
Lead free / RoHS Compliant
FEATURES
SIMPLIFIED SCHEMATIC
Allows meters to operate from 100 to 240Vac
(50/60Hz)
Screw-type terminal block connections
Provides 1500V isolation between AC supply
and input signal
Has prototyping features of the standard DMS-
EB board
On-board solder gaps for decimal point place-
ment
Same size as DMS-30/40 meters 2.02"
(51.3mm)L x 0.82" (20.8mm)W
Low cost
REF. OUT/DP4
(–) INPUT LO
(+) INPUT HI
www.murata-ps.com/rohs
REF. OUT
COMMON
ANALOG
For full details go to
REF. IN
+1.23V
Refer to Mechanical Layout drawing for components and
solder gap location.
Components are user-supplied and not part of the
standard product.
SG5 is not used
 
SG4
12
11
10
9
8
7
SG13
SG14
SG9
SG8
SG12
10.5k
R5
R2
R3
50k
PRODUCT OVERVIEW
Figure 1. DMS-EB-AC/DC Simplified Schematic Diagram
models only), as well as all DMS-30LCD and DMS-40LCD (non-backlit, +5V-powered models only) panel
meters from 100-264Vac (50/60Hz). The on-board AC/DC converter provides an isolated +5Vdc to power
the meter’s electronics, while providing 1500Vac isolation between the AC supply and the input signal
being measured. Line power and input signals connect to two rugged, screw-style terminal blocks (TB1 &
TB2) permanently mounted on the DMS-EB-AC/DC. This type of terminal block provides reliable mechani-
cal connections and eliminates the need for any extra wiring harness connectors.
are required when the meter must be scaled to display non-standard input ranges. The DMS-EB-AC/DC
has provisions for such common applications as attenuation of high input voltages, gain (span) and offset
(zero) adjustments, and direct decimal point placement. The DMS-EB-AC/DC is compatible with all four
input versions of the DMS-30 Series meters (±200mV, ±2V, ±20V and ±200V). Solder gaps, conveniently
placed on the board, are easily bridged or cut to configure the board to meet each application’s specific
requirements.
www.murata-ps.com
R4
2k
This low-cost accessory board provides an easy way of powering all DMS-30PC-X-RL (red low-power
The DMS-EB-AC/DC board includes provisions for installing several usersupplied components that
SG11
SG7
TB1
R1
SG10
1
(+)
HI
SG6
2
LO
(–)
Accessory Board for DMS-30PC/LCD Panel Meters
1
AC
LO
2
AC
HI
Technical enquiries email: sales@murata-ps.com, tel:
TB2
+V
–V
CONVERTER
IN
IN
DC/DC
+V
–V
+
OUT
OUT
DMS-EB-AC/DC
100-264Vac Power Supply
Open solder gap
Closed solder gap
MPM_DMS-EB-AC/DC.B01 Page 1 of 4
SG3
SG2
SG1
1
2
3
4
5
6
+5V
SUPPLY
5V
RETURN
DP 3
DP 2
DP 1
+1 508 339 3000

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DMS-EB-AC/DC-C Summary of contents

Page 1

... The DMS-EB-AC/DC board includes provisions for installing several usersupplied components that are required when the meter must be scaled to display non-standard input ranges. The DMS-EB-AC/DC has provisions for such common applications as attenuation of high input voltages, gain (span) and offset (zero) adjustments, and direct decimal point placement. The DMS-EB-AC/DC is compatible with all four input versions of the DMS-30 Series meters (± ...

Page 2

... Ordering Information DMS-EB-AC/DC-C AC power supply board Functional Specifications (T = +25° Supply Voltage: 100 to 264Vac @ 47-68Hz AC Supply Current @ 264Vac/60Hz 60mA, maximum Isolation 1500Vac, minimum Operating Temperature Range 0 to +60°C Storage Temperature Range –25 to +75°C Humidity 0 to 95%, non-condensing Dimensions 2.02" (51.31mm)L x 0.82" (20.8mm)W x 0.60" ...

Page 3

... TB1 HI is more negative than TB1 LO). 3. Measuring Input Voltages Greater than 1.999Vdc (Use DMS-30 DMS-30-1 Only): If possible, the resistors used for R1 and R2 should be ±1% metal-film types with TCR’s less than or equal to 100ppm/°C. More information on selecting 1% resistors can be found in Application Note 14 ...

Page 4

... Example Using a DMS-30-1 meter (+/-2V range), Vin is 0-5Vdc and the display reading must be “000” to “1500” 1. Assume R1 = 1.0MΩ (FSI x R1 |Vin| - FSI (1.500 x 1,000,000) / (5.0 - 1.500 428,571Ω or 432kΩ 3. Calibrate the meter using a known voltage source. Adjust R4 to compensate for tolerances in R1 and R2. ...

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