DMR20-0/5 Series 0-5V Input, 3½ Digit LED Display Round Process Monitors FEATURES Murata Power Solutions’ new DMR20-0/5 Series are the world's first 0-5V input process monitors designed to fit industry standard, 1.21 inch [30.7 mm] round panel  Provides scaling of 0-5V and 0-10V process signals c utouts. Their large, easy-to-read, 0.30 inch [7.6 mm] digits are available in a choice of  High-quality, 20-turn, span (gain) and zero (offset)  Operates from industrial 5V / 12V / 24V / 36V dc power supplies r ed or green LED displays. For the ultimate versatility in industrial applications, these new process monitors can be operated from any regulated source of 5V, 12V, 24V, or  Fits round 1.21 inch [30.7 mm] cutouts; less than 1.00 inch [25.4 36V dc power. mm] behind-the-panel depth  High input impedance, 100k Ω minimum Gain (span) and offset (zero) adjustments are performed with on-board, precision,  Easy-to-read, 0.30 inch [7.6 mm] high red or green LED display 20-turn potentiometers. All decimal-point and range-change selections are made on a  Supplied with EPDM rubber gasket and hex nut 6-position, vibration-resistant, gold-plated DIP switch. Unlike competitive meters, there are no jumpers or solder gaps to open or close. To further enhance reliability, the  High-quality, 20-turn, span (gain) and zero (offset) adjustments entire assembly utilizes 100% soldered connections. Both power-supply and input-  Gold-plated DIP-switches for range and decimal points: Reliable signal connections are made via a reliable, 3-position, screw-type terminal block. screw-terminal input connections  Rug ged, polycarbonate housing, one-piece package The DMR20-0/5's DIP switch and potentiometers accommodate hundreds of input- voltage / output-reading combinations. This practically eliminates the need for more costly,  Protected against dust and water submersion to IP67/NEMA 6 long-lead-time, factory "customs" in applications which use several different-range meters. An EPDM rubber gasket and hex nut simplify installation and provide IP67 / NEMA 6 protection to environmental dirt and moisture, including water submersion to 3 feet (1 meter). . SIMPLIFIED SCHEMATIC DIAGRAM Figure 1 Simplified Schematic Diagram For full details go to: http://www.murata-ps.com/en/support/rohs- compliance.html www.murata-ps.com/support MPM_DMR20-0/5.A01 Page 1 of 5 DMR20-0/5 Series 0-5V and 0-10V Input 3½ Digit, LED Display Process Control Monitors Performance/Functional Specifications Typical at TA = +25°C, unless otherwise noted. TECHNICAL NOTES Input MMin. Typ. Max. Units 4.9 5.0 5.1 Volts Full Scale Input Range ➀ Input Impedance 100 – 140 K Ω 1. Input Configuration: The DMR20-0/5 has its signal input LO terminal connected to its power supply ground terminal (TB1-2). This Overvoltage Protection ➁ – – ±40 Volts connection effectively places the meter's input in a single-ended Performance configuration, that is, signal ground is connected directly to power Sampling Rate 2.5 reading per second ground. In some applications, single-ended inputs may cause ground- Accuracy (1 minute warm-up): ±0.05% FS ±1 Count loop induced errors (the meter's display becomes unstable). Temperature Drift (0 to +60°C) – ±0.15 ±0.3 Counts/°C Applications which require electrical isolation between the input Power Supply Requirements signal ground and the system power supply ground must use a separate transformer-isolated supply to power the meter. DMR20-0/5-R-C (7.5 mA max.) +5.0 — +40.0 Volts DMR20-0/5-G -C (10 mA max.) +5.0 — +40.0 Volts 2. Panel Mounting: In most standard through-the-panel installations, the DMR20-0/5 must be secured to the panel with the supplied M30 x 1.5 Display metric nut and gasket, see the Mechanical Specifications section for Display Type and Size 3½ digit, 0.30" [7.6 mm] high LED more information. Polarity Indication "–" for negative VIN Overrange Indication "–1_ _ _" for negative inputs "1_ _ _" for positive inputs OPERATING AND SETUP INSTRUCTIONS Physical/Environmental Operating Temperature 0 – +60 °C Storage Temperature –20 – +75 °C As shipped, the DMR20-0/5 is factory calibrated to read "000" for a 0.0 V Humidity (non-condensing) 0 – 85 % input and "1900" for a 5.0 V input. The following worst-case procedure Case Material Polycarbonate assumes the DMR20-0/5 is completely miss-adjusted, i.e., both potentiometers and the DIP switches are randomly set. Weight 0.65 ounces (18.5 grams) 1. Set R7 (full scale span/gain adjust) fully counterclockwise, and R3 (zero/offset adjust) fully clockwise, roughly 22 turns, and place SW3- ➀ The DMR20-0/5 can also be used in most 0-10V applications. See the section on 0-10V inputs for more information. SW6 to OFF (down position). 2. Select DIP switch setting #1 in Table 1. ➁ INPUT LO (TB1-2) shares a common connection with power ground (also TB1–2). Overvoltage specifications apply to the INPUT HI (TB1-1) connection referenced 3. Apply a precision 0.0 V input and adjust R3 until the meter's display to TB1-2. reads "000.” 4. Apply a precision 5.0 V input and adjust R7 until the meter's display reads "1900.” Repeat steps 3 and 4 to make sure the adjustments do not affect one another. Ordering Information 5. Select the appropriate decimal point by setting SW and SW2 per Table DMR20-0/5-R-C +5 to +50Vdc V Supply, Red LED’s 3. DMR20-0/5-G-C +5 to +50Vdc V Supply, Green LED’s NOTE: The "000" to "1900" display readings referred to in the instructions above are for instructional purposes only. If other display Note: An M30 x 1.5 nylon metric hex nut and EPDM sealing gasket are readings are desired, refer to DIP-Switch Settings Tables 1 and 2 for supplied with each meter. The “-C” suffix indicates RoHS compliance SW3-SW6 settings. The initial setting of R3 fully clockwise and R7 Panel Knockout Tools: fully counterclockwise is recommended in the adjustment procedure DMR20-1-KP 1.22” [30.9 mm] punch (no keying notch) for all the following examples. DMR20-2-KP 1.21” [30.7 mm] punch with 4 keying notches DMR20-3-KP Keyway Punch tool www.murata-ps.com/support MPM_DMR20-0/5.A01 Page 2 of 5 DMR20-0/5 Series 0-5V and 0-10V Input 3½ Digit, LED Display Process Control Monitors 0-5 V Inputs 0-10 V Inputs Examples (0-5V Inputs) While the DMR20-0/5 is optimized for operation with 0-5V inputs, its 1. Desired display readings versatile input stage can also accommodate most 0-10V applications. The are: 0.0 V input = "0.00" meter's zero/offset potentiometer (R3) has enough adjustment range to 5.0 V input = "6.00" produce a "000" display reading with input signal levels between –0.1 V and +1.0 V. Table 2 summarizes the available ranges when the DMR20- Use DIP-switch setting #3 in Table 1 and enable decimal point DP2 0/5 is used with 0-10V inputs. by setting SW1 to ON and SW2 to OFF. Apply 0.0 V and adjust R3 so the display reads "0.00.” Apply 5.0 V and adjust R7 so the display reads "6.00.” Example (0-10V Inputs) 2. Desired display readings 1. Desired display readings are: are: 0.0 V input = "000" 0.0 V input = "000" 5.0 V input = "800" 10.0 V input = "500" Use DIP-switch setting #2 in Table 1. Apply 0.0 V and adjust R3 so Use DIP switch setting #4 in Table 2. Apply 0.0 V and adjust R3 so the display reads "000.” Apply 5.0 V and adjust R7 so the display the display reads "000.” Apply 10.0 V and adjust R7 so the display reads "800.” For these display readings, no decimal points are reads "500.” used, so set SW1 and SW2 both to ON. 3. Desired display readings Table 2 are: 0.0 V input = ”000" 0-10 V DIP-Switch Setting 5.0 V input = ”250" 0.0 V Input 10.0 V Input SW3 SW4 SW5 SW6 Use DIP-switch setting #5 in Table 1 and enable decimal point DP1 1 000 to 1400-1999 On Off Off Off by setting SW1 to OFF and SW2 to ON. Apply 0.0 V and adjust R3 so the display reads "000.” Apply 5.0 V and adjust R7 so the display 2 000 to 800-1400 Off On Off Off reads ”250.” 3 000 to 600-800 Off Off On Off 4. Desired display readings 4 000 to 380-600 Off On On Off are: 1.0 V input = ”000" 5 000 to 240-380 Off Off On On 6.0 V input = ”090" 6 000 to 200-300 Off On On On Even though this input is positioned between +1.0 V and +6.0 V, it 7 000 to 180-280 On On On On still meets the 5V full scale differential input range listed in the Functional Specifications section. Use DIP-switch setting #8 in Table 1. Apply 1.0 V and adjust R3 so the display reads “090’. With Table 3 this type of input, it is advisable to recheck both input levels to be Decimal Point Settings (All Models) sure the potentiometer settings did not affect one another. SW1 SW2 Decimal Point Table 1 Off Off DP3 0-5V DIP-Switch Settings ➂ On Off DP2 0.0 V Input 5.0 V Input SW3 SW4 SW5 SW6 Off On DP1 1 000 to 1200-1999 Off Off Off Off On On None 2 000 to 700-1200 On Off Off Off 3 000 to 400-700 Off On Off Off 4 000 to 300-400 Off Off On Off 5 000 to 190-300 Off On On Off ➂The DMR20-0/5 is optimized for 0/5 V process input signals that range between -0.1 V and +6.0 V. As such, input signal ranges can be anywhere 6 000 to 120-190 Off Off On On between -0.1 V and +6.0 V or between +1.0 V and +6.0 V, as long as the 7 000 to 100-150 Off On On On differential value is 5.0 Volts. The meter’s zero/offset potentiometer (R3) has enough adjustment range to produce a “000’ display reading for zero input signal 8 000 to 90-140 On On On On levels between -0.1 V and +1.0 V. As noted earlier, most 0-10 V inputs can also be accommodated as indicated in Table 2. www.murata-ps.com/support MPM_DMR20-0/5.A01 Page 3 of 5 DMR20-0/5 Series 0-5V Input, 3 ½ Digit LED Display Round Process Monitors CONNECTION DIAGRAM Figure 2 Typical DMR20-0/5 Connection Diagram INSTALLATION DIAGRAM Figure 3 Panel Installation www.murata-ps.com/support MPM_DMR20-0/5.A01 Page 4 of 5 DMR20-0/5 Series 0-5V Input, 3 ½ Digit LED Display Round Process Monitors MECHANICAL SPECIFICATIONS AND RECOMMENDED PANEL CUTOUT http://www.murata-ps.com/en/3d/meters.html TB1 Recommended Wire Terminations: Available Panel Knockout Tools: DMR20-1-KP 1.22” [30.9 mm] punch (no keying notch) WIRE SIZE: 18 to 26 AWG (Solid or stranded) DMR20-2-KP 1.21” [30.7 mm] punch with 4 keying notches STRIPPING LENGTH: 0.20” [5.1 mm] Nominal DMR20-3-KP Keyway Punch tool This product is subject to the following operating requirements Murata Power Solutions, Inc. and the Life and Safety Critical Application Sales Policy: 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Refer to: http://www.murata-ps.com/requirements/ ISO 9001 and 14001 REGISTERED 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. © 2015 Murata Power Solutions, Inc. www.murata-ps.com/support MPM_DMR20-0/5.A01 Page 5 of 5