DMS-20PC-4 MURATA-PS [Murata Power Solutions Inc.], DMS-20PC-4 Datasheet - Page 2

• Manufacturer Part Number: DMS-20PC-4
• Manufacturer: MURATA-PS [Murata Power Solutions Inc.]

Performance/Functional Specifications
Typical at T
DMS-20PC-4/20S-C
DMS-20PC-4/20B-C
DMS-20PC-4/20P-C
DMS-PS4-CM-C
DMS-BZL3-C
DMS-BZL4-C
DMS-20-CP
Ordering Information
Current Loop Input
Full Scale Input Range:
Input Impedence:
Voltage Drop
Overvoltage Protection
Performance
Sampling Rate
Accuracy (1 minute warm-up):
Temperature Drift (0 = +50°C)
Display
Display Type and Size
Polarity Indication
Overrange Indication
Physical/Environmental
Operating Temperature
Storage Temperature
Humidity (non-condensing)
Case Material
Weight
A panel-mount retaining clip is supplied with each model.
The DMS-20PC-4/20, using any of the DIP-switch settings described above, can
withstand overcurrents, including those resulting from accidental reverse-polarity
connections, up to ±40mA without sustaining any damage.
Because DATEL's DMS-4/20 loop-powered meters employ active circuitry to
convert the loop current into a voltage, the meters' effective series impedance
varies in a manner that maintains the loop voltage drop constant over the full
4-to-20mA current range. Listed impedance specification applies at 20mA.
When looking up DIP-switch settings in the Tables and the desired display
readings can be achieved with either of two different settings, using the higher
setting # will produce less sensitive offset (R3) and span (R7) adjustments.
Please keep in mind that the DMS-20PC standard meter (from which the DMS-
20PC-4/20 is derived) has an accuracy specification of ±2 counts (max.). Thus,
it may not always be possible to obtain the exact desired display reading.
A
= +25°C, unless otherwise noted.
Unipolar reading, loop-powered LED meter
Bipolar reading, loop-powered LED meter
Positive reading, loop-powered LED meter
+24V/0.45A AC/DC power supply module
Bezel assembly
Bezel assembly with sealing gasket
Panel cutout punch
Min.
–40
3½ digit, 0.37"/9.4mm high red LED
+4
–
–
–
–
0
0
"–1____" for negative Vin
"1____" for positive Vin
"–" for negative reading
2.5 reading per second
0.6 ounces (17 grams)
±0.05%FS ±1 Count
±0.15
Typ.
250
4.5
Polycarbonate
–
–
–
–
–
www.murata-ps.com
Max.
±0.3
+20
+60
+75
5.0
±2
95
Cnts/°C
Units
Volts
mA
mA
°C
°C
%
OPERATING AND SETUP INSTRUCTIONS
DMS-20PC-4/20S (Unipolar Reading Model)
As shipped, the DMS-20PC-4/20S is factory calibrated to read "000"
for a 4mA input and "1000" for a 20mA input. The following worst-case
procedure assumes the DMS-20PC-4/20S is completely mis-adjusted,
i.e., both potentiometers and the DIP switches are randomly set. When
performing DIP-switch settings, be sure the DIP switch's small actuators
are firmly engaged in their fully-ON or fully-OFF positions.
Table 1. DMS-20PC-4/20S (Unipolar Model) DIP-Switch Settings
1. Desired display readings are:
2. Desired display readings are:
1. Set R7 (full scale span/gain adjust) and R3 (zero/offset adjust) fully
2. Select DIP switch setting #2.
3. Apply a precision 4mA input, with proper polarity, and adjust R3 until
4. Apply a precision 20mA input and adjust R7 until the meter's display
5. Select the appropriate decimal point by setting SW4, SW5 or SW6 to
Examples (DMS-20PC-4/20S-Unipolar Model)
Display Reading
1. 000 to 1050-1999
2. 000 to 650-1350
3. 000 to 450-800
4. 000 to 300-500
5. 000 to 200-300
NOTE: If a display reading other than "000" to "1000" is desired,
refer to DIP–Switch Settings Table 1 for SW1–SW3 settings.
Use DIP-switch setting #3 in Table 1 and enable decimal point DP2 via
SW5. Apply 4mA and adjust R3 so the display reads "0.00". Apply
20mA and adjust R7 so the display reads "6.00".
Use DIP-switch setting #2 in Table 1. Apply 4mA and adjust R3 so the
display reads "000". Apply 20mA and adjust R7 so the display reads
"800". For these display readings, no decimal points are used. Set
SW4, SW5 and SW6 to OFF.
clockwise, roughly 22 turns, and place SW1-SW6 to OFF.
the meter's display reads "000".
reads "1000". Repeat steps 3 and 4 to make sure the adjustments do
not affect one another.
ON (DP1, DP2 or DP3 respectively).
4mA
4mA ="0.00"
20mA = "6.00"
4mA = "000"
20mA = "800"
DMS-20PC-4/20 Series
Technical enquiries email: [e-mail], tel:
Subminiature 4-20mA Loop-Powered
20mA
3½ Digit LED Process Monitors
SW1
MPM_DMS20pc-420.C02 Page 2 of 6
Off
On
Off
Off
On
1
1
2
2
SW2
Off
Off
On
Off
On
3
3
ON
ON
4
4
[phone]
5
5
SW3
Off
On
Off
Off
On
6
6