DMS-30PC-4/20S
4-20mA Input 3�½ Digit Panel Meters
with Full-Size LED Displays
Examples
1.
Desired display readings are:
4mA ="0.00"
20mA = "2.00"
1
2
3
4
ON
+24V
+
(TB1-1)
+V (TB2-1)
+
DMS-30PC-4/20S-24RL
5
6
7
8
LOOP-POWERED
TRANSMITTER
Use DIP-switch setting #1 and enable decimal point DP2 via SW6.
Apply 4mA and adjust R3 so the display reads "0.00". Apply 20mA and
adjust R7 so the display reads "2.00".
2.
Desired display readings are:
4mA = "–100"
12mA = "000"
20mA = "100"
ON
–
4-20mA
N.C.
(TB1-2)
–
–V (TB2-2)
24V GROUND
1
2
3
4
5
6
7
8
Figure 3. Typical Connections for Loop-Powered Transmitters
Driving Single-Ended Meters.
Use DIP-switch setting #4. Apply 12mA and adjust R3 so the display
reads "000". Apply 20mA and adjust R7 so the display reads "100".
Apply 4mA and the display should read "–100". For these display read-
ings, no decimal points are used. Set SW5, SW6 and SW7 to OFF.
3.
Desired display readings are:
4mA = ".000"
12mA = ".250"
1
2
3
4
ON
+24V
+V (TB2-1)
DMS-30PC-4/20S-24RL-I
(TB2-2)
–V
5
6
7
8
+
+
SINGLE-ENDED
TRANSMITTER
This example is not as straightforward as the previous two. Notice that
12mA is exactly halfway between 4mA and 20mA. If we assume the
input could go up to 20mA, the display reading would be: 2 x .250 or
".500". From the table, we can select DIP-switch setting #2 and enable
DP1 via SW5. Apply 4mA and adjust R3 so the display reads ".000".
Apply 12mA and adjust R7 so the display reads ".250".
+
(TB1-1)
4-20mA
(TB1-2)
–
+
PLC or OTHER
SINGLE-ENDED
DEVICE
–
24V GROUND
4-20mA
–
Figure 4. Typical Connections for Isolated-Supply Meters
in Series with an Auxiliary Device
CONNECTION DIAGRAMS
+24V
+24V
+5V
+
+
SINGLE-ENDED
TRANSMITTER
(TB1-1)
4-20mA
+V (TB2-1)
+
+
LOOP
TRANSMITTER
(TB1-1)
4-20mA
+V (TB2-1)
+
DMS-30PC-4/20S-24RL
+
DMS-30PC-4/20S-24RL
–
24V GROUND
(TB1-2)
–
–V (TB2-2)
–
24V GROUND
(TB1-2)
–
–V (TB2-2)
5V GROUND
Figure 2. Typical Connections for Single-Ended Transmitters Driving
Single-Ended +24V Powered Meters.
Figure 5. Typical Connections for +5V Powered Meters. Note that 5V Ground
and 24V Ground are Tied Together Inside the Meter.
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MPM_DMS-30PC-420S.B01
Page 3 of 4
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