Performance/Functional Specifi cations
Typical at TA = +25°C, unless otherwise noted.
DIP-Switch Settings Table ➁
➀ Input Grounding: Except for the "-I"suffi x models which feature isolated current
loop inputs, all other DMS-30PC-4/20S meters are supplied with their 4-20mA
negative-input terminals (TB1-2, "-") internally connected to their power supply
ground terminal (TB2-2, “-V”). This single-ended input confi guration is compatible
with most grounded-referenced 4-20mA transmitters.
Applications in which the DMS-30PC-4/20S and its associated 4-20mA
transmitter are connected to a common ground and the transmitter drives two or
more loads (for example, the meter in series with a PLC) must have the meter
connected as the fi rst device in the current loop, that is, closest to the system
ground (see Figure 2). If this is not possible and/or the meter must be connected
in the middle of the current loop, then'-I' suffi x models must be used to provide
the required isolation between the meter’s current loop input and the power sup-
ply ground ("-V"). See Figures 2, 3, 4, and 5 for typical loop connections.
DMS-30PC-4/20S-5RS-C +5V supply, standard-intensity red LED's
DMS-30PC-4/20S-5GS-C +5V supply, standard-intensity green LED's
DMS-30PC-4/20S-5RL-C +5V supply, low-power red LED's
DMS-30PC-4/20S-5RH-C +5V supply, high-intensity red LED's
DMS-30PC-4/20S-24RL-C +7.5V to +32V supply, low-power red LED's
DMS-30PC-4/20S-24RS-
I-C +24V isolated supply, standard-intensity
red LED’s
DMS-30PC-4/20S-24RH-
I-C +24V isolated supply, high-intensity red LED’s
DMS-30PC-4/20S-24BS-I-C +24V isolated supply, high-intensity blue LED’s
DMS-30PC-4/20S-24GS-I-C +24V isolated supply, standard-intensity
green LED’s
DMS-BZL1-C Panel-mount bezel assembly
DMS-BZL2-C Panel-mount bezel with sealing gasket
DMS-30-CP Panel cutout punch
A panel-mount retaining clip is supplied with each model.
As shipped, the DMS-30PC-4/20S is factory calibrated to read "000"
for a 4mA input and "1999" for a 20mA input. The following worst-case
procedure assumes the DMS-30PC-4/20S is completely mis-adjusted,
i.e., both potentiometers and the DIP switches are randomly set.
1. Set R7 (gain/span adjust) and R3 (zero/offset adjust) fully clockwise,
roughly 20 turns, and place SW1-SW8 to OFF (down position).
2. Set SW1 to ON (up position). See DIP switch setting #3.
3. Apply a precision 4mA input, with proper polarity, and adjust R3 until
the meter's display reads "000".
4. Apply a precision 20mA and adjust R7 until the display reads "1999".
Repeat 3 and 4 to make sure adjustments do not affect one another.
5. If desired, select the appropriate decimal point by setting either SW5,
SW6 or SW7 to ON (DP1, DP2 or DP3 respectively).
NOTE: If a display reading other than "000" to "1999" is desired,
refer to the DIP-Switch Settings Table for SW1-SW4 settings.
➁ When looking up DIP-switch settings in the Table and the desired display read-
ings happen to fall between two switch settings, try performing the adjustments
with both settings to determine which one offers the better settability. Please
keep in mind that the DMS-30PC meter (from which the DMS-30PC-4/20S is
derived) has an accuracy specifi cation of ±2 counts (max.). Thus, it may not
always be possible to obtain the exact desired display reading.
Current Loop Input Min. Typ. Max. Units
Full Scale Input Range +3.5 – +22 mA
Input Impedence – 100 – Ohms
Voltage Drop – – 2.0 Volts
Overcurrent Protection – ±0.15 ±0.3 mA
Performance
Sampling Rate 2.5 reading per second
Accuracy (1 minute warm-up) ±0.05%FS ±1 Count
Temperature Drift – ±0.15 ±0.3 Cnts/°C
Power Supply Requirements
DMS-30PC-4/20S-5RS +4.75 to +5.25Vdc at 225mA max.
DMS-30PC-4/20S-5GS +4.75 to +5.25Vdc at 225mA max.
DMS-30PC-4/20S-5RH +4.75 to +5.25Vdc at 225mA max.
DMS-30PC-4/20S-5RL +4.75 to +5.25Vdc at 20mA max.
DMS-30PC-4/20S-24RL +7.5 to +32Vdc at 30mA max.
DMS-30PC-4/20S-24XX-I (models) +21.6 to +26.4Vdc at 60mA max.
Display
Display Type and Size 3½ digit, 0.56"/14.2mm high LED
Polarity Indication "–" for negative readings
Overrange Indication "–1_ _ _ " for negative inputs
"1_ _ _ " for positive inputs
Physical/Environmental
Operating Temperature 0 – +60 °C
Storage Temperature –40 – +75 °C
Humidity (non-condensing) 0 – 95 %
Case Material Polycarbonate
Weight 1 ounces (28 grams)
Ordering Information
Display Reading SW1 SW2 SW3 SW4
1. 000 to 100-300 On On On Off
2. 000 to 400-600 Off On Off Off
3. 000 to 700-1999 On Off Off Off
4. ±100 On On On Off
5. ±200 to ±300 On On Off Off
6. ±400 to ±600 On Off Off Off
7. ±700 to ±1999 Off Off Off On
ACCESSORIES
See www.murata-ps.com/dpm-availability for model-specifi c availability.
www.murata-ps.com/support
DMS-30PC-4/20S
4-20mA Input 3½ Digit Panel Meters
with Full-Size LED Displays
MPM_DMS-30PC-420S.C01 Page 2 of 4
OPERATING AND SETUP INSTRUCTIONS
