DCA5-20PC-7-DC4-RL-C Murata Power Solutions Inc, DCA5-20PC-7-DC4-RL-C Datasheet - Page 4

• Manufacturer Part Number: DCA5-20PC-7-DC4-RL-C
• Description: DC Ammeter 25/250A Ext. Shunt
• Manufacturer: Murata Power Solutions Inc
• Type: LED-Display, Subminiature DC Ammetersr

Specifications of DCA5-20PC-7-DC4-RL-C

• Equipment Type: LED-Display, Subminiature DC Ammeters
• Input: 50 mV
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATIONS
High-Side Shunts: ‘-DC4’ isolated-power ammeters 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 (posi-
tive terminal) of the supply. Figures 4 and 5 depict typical high-side
shunt connections. As shown in Figure 5, isolated-power models can
also be used in applications where one supply powers the ammeter
LOW OR HIGH SIDE
SHUNT CAN BE IN
Figure 5. Using "-DC4" Isolated-Power Models to Maintain Isolation
LOAD
Figure 4. High-Side Shunt Connections for "-DC4"
–IN
50mV SHUNT
1
–IN
LOAD CURRENT
TB1
50mV SHUNT
1
8-36Vdc Isolated-Power Models
Between Two Power Supplies
TB1
+IN
2
CAL
+IN
2
LOAD CURRENT
CAL
M1
LOAD
DC SUPPLY
M1
#2
J3 J1 J2
+
–
+V
1
2
J3
1
+V
DC SUPPLY #1
TB2
+
1
2
J1
+
1
8-36Vdc
1
2
3
TB2
J2
2
DC SUPPLY
1
–V
1
2
3
8-36Vdc
2
1
–V
–
www.murata-ps.com/dpm
–
GROUND
POWER
(0Vdc)
5. Operation With 36 to 75Vdc Power: As shipped, all ‘-DC1’ models’
6. Replacing Analog Panel Meters: DCA5-20PC ammeters can be
7. Decimal Point Selection: As shown in the Ordering Information guide,
and a second supply powers the load, but the two supply grounds
cannot be tied together. ‘-DC4’ isolated-supply models include a built-in
dc/dc converter to provide a minimum of 500Vdc isolation between the
shunt (TB1) and power supply inputs (TB2).
rated operating supply range is +5 to +40Vdc. However, ‘-DC1’ models
can be user confi gured for 36 to 75Vdc operation by removing (open-
ing) jumper J3. Please note that this user modifi cation can only be
performed on ‘-DC1 power models. Also, all ‘-DC1’ models – including
those that have been modifi ed for 36-75Vdc operation – can only be
connected in low-side, grounded-shunt applications. See Figure 3 for
detailed wiring information. Any reconfi guration of J3 must be made
prior to connecting the power supply and shunt to the ammeter.
used as replacements for analog panel meters that are driven by
50 or 100mV shunts, if a suitable dc voltage is available for power-
ing the ammeter. In retrofi t applications, it is extremely important to
determine the shunt’s electrical confi guration (i.e., high or low side).
If any doubt exists as to the shunt’s location, use only ‘-DC4’ isolated-
supply models. Rewiring must be performed with all power sources
de-energized.
DCA5-20PC ammeters are multiple input-range devices. For example,
with a 50mV input, DCA5-20PC-1-DC1 models can be confi gured to
display “5.00”, “50.0, or “500” Amps by simply removing or relocating
decimal-point-selector jumper J2 (see Figure 6). Decimal points serve as
placeholders only; they have no affect on displayed accuracy or resolution.
If jumper J2 is not available, solder gaps SG1, SG2, or SG3 can be used
to select DP1 (“1.XXX”), DP2 (“1X.XX”), or DP3 (“1XX.X”), respectively.
1
Figure 6. Decimal Point Selection Using J2 and J1
TB1
2
CAL
ALL MODELS
50mV & 100mV Input, LED-Display,
(Applies to All Models)
03 May 2010 MPM_DCA5-20PC.B06 Page 4 of 6
DCA5-20PC Series
1
2
J3
1
2
Subminiature DC Ammeters
J1 J2
1
TB2
1
2
3
2
1
email: [e-mail]
SG3
SG2
SG1
J2 CONFIGURATION
J1 CONFIGURATION
1
2
3
1
2
3
1
2
3
1
2
1
2
DP2 OFF
DP3 OFF
DP2 ON
(1X.XX)
DP3 ON
(1XX.X)
DP1 OFF
DP1 ON
(1.XXX)