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| 型号： | DCA-20PC-6-DC4-RL-C |
| 厂商： | Murata Power Solutions Inc |
| 文件页数： | 4/6页 |
| 文件大小： | 0K |
| 描述： | AMMETER LED 8-36VDC 19.99A RED |
| 3D 型号： | DCA-20PC Series.pdf DCA-20PC Series.sldprt DCA-20PC Series.stp DCA-20PC Series.igs |
| 标准包装： | 12 |
| 系列： | DCA-20PC |
| 类型： | 安培表 |
| 测量范围： | 0 ~ 19.99A |
| 显示器样式： | 红色字符，黑色背景 |
| 显示器类型： | LED |
| 显示器正面尺寸： | 1.30" L x 0.80" W（33.0 x 20.3mm） |
| 显示器位数： | 3.5 |
| 显示器位数 - 高度： | 0.370"（9.40mm） |
| 背光： | 无 |
| 安装类型： | 面板安装 |
| 端子： | 端接块 |
| 电源电压： | 8 ~ 36VDC |
| 其它名称： | 811-2705 DCA-20PC-6-DC4-RL-C-ND |
DCA-20PC Series
LED Display, Subminiature DC Ammeters
TECHNICAL NOTES
Low-side shunts: Applications that employ a single power supply to
power both the load and the ammeter, and the external shunt is located
in the negative side of the supply (commonly referred to as “low side” or
“grounded shunt”) should use ‘-DC1’ non-isolated power DCA-20PC Series
ammeters. Figures 2 and 3 depict typical low-side shunt connections.
High-side shunts: ‘-DC4’ 8-36Vdc isolated-power models must be
used in all applications that employ a single power supply to power
both the load and the ammeter and the shunt is located in the high side
(positive terminal) of the power supply. Figures 4 and 5 depict typical
high-side shunt connections. As shown in Figure 5, ‘-DC4’ isolated-
power models can also be used in applications where one supply
powers the ammeter and a second supply powers the load, but the two
with Built-In Shunts
7. Decimal Points: DCA-20PC ammeters’ decimal points are factory con-
?gured for the respective full-scale input range. However, the decimal
points serve as placeholders only, they have no affect on the ammeter’s
displayed accuracy or resolution.
DCA-20PC-X- DC4- XX
1
CAL
supply-grounds cannot be tied together. ‘-DC4’ models include a built-in
dc/dc converter to provide a minimum 500Vdc isolation between the
SHUNT IS IN
HIGH SIDE
1
TB1
2
1
TB2
2
3
TB2-1 AND TB2-2
shunt (TB1) and power supply (TB2) inputs.
5. Replacing Analog Panel Meters: DCA-20PC ammeters can be used
ARE INTERNALLY
SHORTED
as replacements for analog panel meters if a suitable dc voltage
–SHUNT
+SHUNT
+V
–V
is available for powering the ammeter. In retro?t applications, it is
important to determine the shunt’s electrical con?guration (i.e., high or
low side). If any doubt exists as to the shunt’s location, use only ‘-DC4’
+
+
–
isolated-supply models. All rewiring must be performed with the load
and power supply de-energized.
6. Operation With 36 to 75Vdc Power: As shipped, all ‘-DC1’ models’
LOAD
–
LOAD
CURRENT
DC SUPPLY #1
8-36Vdc
rated operating supply range is +5 to +40Vdc. However, ‘-DC1’
models can be user con?gured for 36 to 75Vdc operation by removing
(opening) jumper J3. Please note that this modi?cation can only be
–
DC SUPPLY
#2
+
performed on ‘-DC1’ power models. Also, all ‘-DC1’ models – including
those that have been modi?ed for 36-75Vdc operation – can only be
connected in low-side, grounded-shunt applications. See Figure 3 for
Figure 5. Using "-DC4" Isolated-Power Models to Maintain Isolation
Between Two Power Supplies
DCA-20PC-X- DC4 -XX
DCA-20PC-X- DC4 -XX
1
1
CAL
CAL
SHUNT IS IN
HIGH SIDE
1
TB1
2
1
TB2
2
3
TB2-1 AND TB2-2
SHUNT IS IN
LOW SIDE
1
TB1
2
1
TB2
2
3
TB2-1 AND TB2-2
ARE INTERNALLY
ARE INTERNALLY
SHORTED
SHORTED
–SHUNT
+SHUNT
+V
+V
–V
–SHUNT
+SHUNT
+V
+V
–V
–
LOAD
+
+
LOAD
–
LOAD CURRENT
LOAD CURRENT
–
DC SUPPLY
+
–
DC SUPPLY
8-36Vdc
+
8-36Vdc
Figure 4. High-Side Shunt Connections for "-DC4"
8-36Vdc Isolated-Power Models
Figure 6. Using "-DC4" Isolated-Power Models
in Low-Side Shunt Applications
www.murata-ps.com/support
MPM_DCA-20PC.B07 Page 4 of 6
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