收藏本站
DMS-30LCD Series
3? Digit, LCD Display Digital Panel Voltmeters
APPLICATIONS
2. Differential Input Con?gurations: Differential measurements can be
made with either 5V-powered or 9V-powered meters. Figure 3, though
not a practical real-world application, uses a voltage divider to demon-
strate the concept of a differential input signal. Be careful not to exceed
the ±2V common mode voltage limitation for 5V-powered meters.
4. Floating Signal Source Measurements: Floating signals can be
measured using the circuits shown in Figures 5 and 6. Figure 5 uses
a 5V-powered meter. Figure 6 uses a 9V-powered meter. Connecting
pin 10 (ANALOG COMMON) to (–) INPUT LO (pin 12) provides the
reference point for the meter’s input.
A “?oating” input is a signal that has no galvanic connection to the
meter’s power supply. In the ?gures below, the 1.5V battery illustrates a
REF OUT
8
DMS-30LCD-1-5
11
(+) IN HI
R1
1k
true ?oating input.
11
DMS-30LCD-1-5
REF IN 7
DP1 6
1
+5V SUP
3
5V RET
12
(–) IN LO
R2
1k
R3
1k
1.5V
CELL
–
(+) IN HI
10
ANA COMM
12
(–) IN LO
8
REF OUT
7
REF IN
120 VAC
AC to DC Converter
120 VAC
1
+5V SUP
3
5V RET
6
DP1
Figure 3. Differential Input Con?guration
(5V-Powered Models)
AC to DC Converter
Figure 5. Floating Input Measurements
(5V-Powered Models)
3. Engineering Scaling: For measuring voltages greater than the full
scale input range of a given meter, the input signal must be attenuated.
A simple voltage divider (similar to that shown in Figure 4) will scale
the input to within the range of the selected meter. R1 and R2 should
1.5V
11
(+) IN HI
10
ANA COMM
DMS-30LCD-1-9
8
REF OUT
be precision, ±1%, metal-?lm resistors with absolute TCR’s less than
50ppm/°C. See Ap Note 4 for more information on engineering scaling.
50k Ω < R1 + R2 < 10M Ω
R2
x V IN = Reading
CELL
–
12
(–) IN LO
9V
1
+ BAT
3
–BAT
6
DP1
7
REF IN
R1 + R2
BATTERY
–
Figure 6. Floating Input Measurements
R1
11
DMS-30LCD-1-5
(9V-Powered Models)
V IN
(+) IN HI
8
REF OUT
R2
12
5. Process Control (4-to-20mA) Measurements: In many common
–
(–) IN LO
7
process-control applications, a 4-to-20mA current loop is used to
1
+5V SUP
3
5V RET
REF IN
transmit information. Because DMS-30LCD meters have such high
input impedance, a simple shunt resistor across the meter’s input can
be used to convert the loop current to a voltage. See Figure 7. The
120 VAC
AC to DC Converter
Figure 4. Input Attenuation Circuit
value of the shunt resistor is a function of the scaling requirements of
the particular application and can be calculated using the following
equation:
www.murata-ps.com/dpm
06 Jan 2011
email: sales@murata-ps.com
MPM_DMS30LCD.D02 Page 4 of 6
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
DMS-30LCDA-4/20S-C METER LCD SELF-POWERED 3.5DIG
DMS-30PC-1-RH-C DPM LED MINI 2VDC SUPER-BRIGHT
DMS-30PC-4/20S-24GS-I-C DPM LED 24V SUPPLY 3.5DIG GREEN
DMS-40LCD-0/1-5-C DPM LCD 200MV/2VDC 4.5DIGIT
DMS-40LCD-4/20S-C METER LCD SELF-POWERED 4.5DIG
DMS-40PC-1-RL-BCD-C DPM LED 2VDC 4.5DIG BCD LP RED
DMS-40PC-4/20S-24RS-I-C METER DISP LED 4.5DIG 24V RED
DMU-30ACV-1-DR-C VOLT METER LED 200ACV 0.1V RED
相关代理商/技术参数
DMS-30LCD-2-5 功能描述:数字面板表 3.5 Digit Volt Meter +-20V / +5V RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM
DMS30LCD-2-5 制造商:Murata Power Solutions 功能描述:INDICATOR DMS 30LCD-2-5
DMS-30LCD-2-5B 功能描述:数字面板表 3.5 Digit Volt Meter +-20V / +5V Backlit RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM
DMS-30LCD-2-5B-C 功能描述:数字面板表 3.5 Digit Volt Meter +-20V / +5V Backlit RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM
DMS-30LCD-2-5-C 功能描述:数字面板表 3.5 Digit Volt Meter +-20V / +5V RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM
DMS-30LCD-2-9 功能描述:数字面板表 3.5 Digit Volt Meter +-20V / +9V RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM
DMS-30LCD-2-9B 功能描述:数字面板表 3.5 Digit Volt Meter +-20V / +9V Backlit RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM
DMS-30LCD-2-9B-C 功能描述:数字面板表 3.5 Digit Volt Meter +-20V / +9V Backlit RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM