DMS-30PC-4/20S www.murata-ps.com 4-20mA Input 3½ Digit Panel Meters with Full-Size LED Displays FEATURES ■ Full-size, 0.56" (14.2mm), red or green LED's ■ Low-power or high-intensity LED's optional The DMS-30PC-4/20S Series of 4-20mA current-loop-input, 3½ digit, LED display panel meters offer an outstanding combination of electrical performance, display readability, ease-of-use, and long-term reliability. Each of the 5 models features a large (0.56"/14.2mm), red or green, LED display. Low-power or high-intensity red models are optional. Power supplies can be a single +5V or an optional, wide-range +7.5-32V (24V nominal). All DMS-30PC-4/20S meters are constructed using DATEL's super-reliable, fieldproven, epoxy-encapsulated DMS-30PC digital voltmeters. The entire assembly utilizes 100% soldered connections. These are the most rugged, 4-20mA input, panel meters in the world. ■ Single +5V or optional +7.5-32V supply ■ +24V Isolated-power models ■ Low power consumption, 15mA from +5V ■ 100Ω impedance, 2V loop drop ■ DIP-switch selectable range and decimal points ■ Hundreds of different input/readout combinations ■ Vibration-resistant package; Reliable screw-terminal input connections ■ High-quality, 20-turn, gain/span and zero/offset adjust potentiometers ■ Miniature size: Gain (span) and offset (zero) adjustments are both performed with high-precision, 20-turn potentiometers. All decimal point and range-change settings are made on a goldplated, vibration-resistant, DIP switch; there are no cumbersome solder gaps or jumpers to contend with. Connections to the current loop and the power source are both made on a rugged, four-position, screw-type terminal block. The DMS-30PC-4/20S's user-friendly design accommodates virtually hundreds of different input-current/output-reading combinations. This eliminates the majority of requirements for more costly, long-lead-time, factory "specials"– especially in applications requiring several different-range meters. A bezel assembly, featuring secure screw fasteners and an EPDM rubber gasket, is available for applications requiring moisture and/or dust resistance. 2.17" x 0.92" x 1.02" 55mm x 23mm x 27mm +5V DMS-30PC-1 3½ DIGIT A/D CONVERTER DATA R7 GAIN ADJUST R3 ZERO ADJUST DP1 BAND-GAP REFERENCE CIRCUIT DP2 DP3 N.C. +5V ON +5V 1 2 3 4 5 6 7 8 (SW1) DIP SWITCHES VOLTAGE CONVERTER 1 TB1 1 TB2 2 1 2 SG9 + For full details go to www.murata-ps.com/rohs + – 4-20mA LOOP INPUT ➀ –V is not connected to meter ground on ‘-I’ suffix models. www.murata-ps.com/dpm – +V –V POWER SUPPLY INPUT email: [email protected] 24 Mar 2011 MPM_DMS-30PC-420S.B04 Page 1 of 4 DMS-30PC-4/20S 4-20mA Input 3½ Digit Panel Meters with Full-Size LED Displays Performance/Functional Specifications Ordering Information Typical at TA = +25°C, unless otherwise noted. 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) Temperature Drift ±0.05%FS ±1 Count – ±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. Overrange Indication Storage Temperature Humidity (non-condensing) Case Material Weight ACCESSORIES DMS-BZL1-C DMS-BZL2-C DMS-30-CP Panel-mount bezel assembly Panel-mount bezel with sealing gasket Panel cutout punch A panel-mount retaining clip is supplied with each model. 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 "–" for negative readings 4. ±100 On On On Off "–1_ _ _ " for negative inputs "1_ _ _ " for positive inputs 5. ±200 to ±300 On On Off Off 6. ±400 to ±600 On Off Off Off 7. ±700 to ±1999 Off Off Off On Physical/Environmental Operating Temperature DMS-30PC-4/20S-24RH-I-C DMS-30PC-4/20S-24BS-I-C DMS-30PC-4/20S-24GS-I-C Display Reading 3½ digit, 0.56"/14.2mm high LED Polarity Indication +5V supply, standard-intensity red LED's +5V supply, standard-intensity green LED's +5V supply, low-power red LED's +5V supply, high-intensity red LED's +7.5V to +32V supply, low-power red LED's +24V isolated supply, standard-intensity red LED’s +24V isolated supply, high-intensity red LED’s +24V isolated supply, high-intensity blue LED’s +24V isolated supply, standard-intensity green LED’s DIP-Switch Settings Table ➁ Display Display Type and Size DMS-30PC-4/20S-5RS-C DMS-30PC-4/20S-5GS-C DMS-30PC-4/20S-5RL-C DMS-30PC-4/20S-5RH-C DMS-30PC-4/20S-24RL-C DMS-30PC-4/20S-24RS-I-C 0 – +60 °C –40 – +75 °C 0 – 95 % Polycarbonate 1 ounces (28 grams) ➀ Input Grounding: Except for the "-I"suffix 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 configuration 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 first 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' suffix models must be used to provide the required isolation between the meter’s current loop input and the power supply ground ("-V"). See Figures 2, 3, 4, and 5 for typical loop connections. ➁ When looking up DIP-switch settings in the Table and the desired display readings 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 specification of ±2 counts (max.). Thus, it may not always be possible to obtain the exact desired display reading. OPERATING AND SETUP INSTRUCTIONS 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. www.murata-ps.com/dpm email: [email protected] 24 Mar 2011 MPM_DMS-30PC-420S.B04 Page 2 of 4 DMS-30PC-4/20S 4-20mA Input 3½ Digit Panel Meters with Full-Size LED Displays Examples +24V 1. Desired display readings are: + ON +V (TB2-1) + (TB1-1) 4mA ="0.00" 20mA = "2.00" 1 2 4 3 7 6 5 8 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". LOOP-POWERED TRANSMITTER – DMS-30PC-4/20S-24RL 4-20mA N.C. (TB1-2) – –V (TB2-2) 24V GROUND 2. Desired display readings are: ON 4mA = "–100" 12mA = "000" 20mA = "100" 1 2 3 4 Figure 3. Typical Connections for Loop-Powered Transmitters Driving Single-Ended Meters. 7 6 5 8 +24V 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 readings, no decimal points are used. Set SW5, SW6 and SW7 to OFF. +V (TB2-1) DMS-30PC-4/20S-24RL-I (TB2-2) –V + 3. Desired display readings are: ON 4mA = ".000" 12mA = ".250" 1 2 3 4 + (TB1-1) + 5 7 6 8 (TB1-2) + PLC or OTHER SINGLE-ENDED DEVICE 4-20mA SINGLE-ENDED TRANSMITTER 4-20mA – 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". – – 24V GROUND Figure 4. Typical Connections for Isolated-Supply Meters in Series with an Auxiliary Device +24V +5V + CONNECTION DIAGRAMS +V (TB2-1) + (TB1-1) + (TB1-2) – 4-20mA DMS-30PC-4/20S-24RL LOOP TRANSMITTER +24V – + +V (TB2-1) + (TB1-1) 4-20mA + DMS-30PC-4/20S-24RL SINGLE-ENDED TRANSMITTER – 24V GROUND (TB1-2) –V (TB2-2) 24V GROUND 5V GROUND Figure 5. Typical Connections for +5V Powered Meters. Note that 5V Ground and 24V Ground are Tied Together Inside the Meter. – –V (TB2-2) Figure 2. Typical Connections for Single-Ended Transmitters Driving Single-Ended +24V Powered Meters. DMS-30PC-4/20S-24XX-I Figure 6. Typical Connections for Loop-Powered Transmitters Driving Isolated-Supply Meters (-I part number suffix). www.murata-ps.com/dpm email: [email protected] 24 Mar 2011 MPM_DMS-30PC-420S.B04 Page 3 of 4 DMS-30PC-4/20S 4-20mA Input 3½ Digit Panel Meters with Full-Size LED Displays MECHANICAL DIMENSIONS: Inches (mm) 2 PL DEC ±0.02 (±0.51) 3 PL DEC ±0.010 (±0.254) 18 to 26 AWG (Solid or stranded) 0.20" (5.08mm) 1 ® STRIPPING LENGTH: 1.33 (33.8) 1.02 (25.9) 0.040 (1.02) ® WIRE SIZE: DMS-30PC-4/20S TOLERANCES: MADE IN USA 2.09 (53.09) 0.04 (1.02) 0.84 (21.34) 2.17 (55.12) Zero/Offset Adjust Back View 1 Depth dimension for the DMS-30PC-4/20S-24RL model only. DIP Switches D1 12 0.92 (23.37) Front View 1 ON R10 R3 Zero Adjust SW1 1 R12 2 3 R9 R1 R8 R7 Gain Adjust 4 5 6 8 7 SG10 R6 TB1 + – TB2 + – 1 2 U2 SG9 1 R5 R4 R2 Gain/Span Adjust 2 + – + – Loop Input DP1 (SW5) Power Input DP2 (SW6) DP3 (SW7) OPTIONAL BEZEL (DMS-BZL1 and DMS-BZL2) #2-56 INSERT 0.156 (3.96) DEEP FRONT VIEW 0.187 (4.75) PANEL ® ® MADE IN USA 1.270 (32.26) OPTIONAL GASKET BEZEL 2.55 (64.77) RECOMMENDED DRILL AND PANEL CUTOUT DIMENSIONS INTERNAL CORNER RADII: 0.032 (0.81) MAX. 1.07 (27.18) PANEL CUTOUT RETAINING CLIP INSTALLATION 0.116 (2.95) 0.878 (22.30) PANEL 2.118 (53.80) MADE IN USA ISO 9001 and 14001 REGISTERED ® Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. 0.096 (2.44) ® 2.35 (59.69) 0.093 (2.362) DIAMETER (4 REQUIRED) ONLY WHEN USING OPTIONAL BEZEL ASSEMBLY A panel-mount retaining clip is supplied with all models Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. © 2011 Murata Power Solutions, Inc. www.murata-ps.com/locations email: [email protected] 24 Mar 2011 MPM_DMS-30PC-420S.B04 Page 4 of 4