DMR20-0/5-R-C.

DMR20-0/5 Series 0-5V Input, 3½ Digit LED Display Round Process Monitors FEATURES  Provides scaling of 0-5V and 0-10V process signals  High-quality, 20-turn, span (gain) and zero (offset)  Operates from industrial 5V / 12V / 24V / 36V dc power supplies  Fits round 1.21 inch [30.7 mm] cutouts; less than 1.00 inch [25.4 mm] behind-the-panel depth  High input impedance, 100k Ω minimum  Easy-to-read, 0.30 inch [7.6 mm] high red or green LED display  Supplied with EPDM rubber gasket and hex nut  High-quality, 20-turn, span (gain) and zero (offset) adjustments  Gold-plated DIP-switches for range and decimal points: Reliable screw-terminal input connections  Rugged, polycarbonate housing, one-piece package  Protected against dust and water submersion to IP67/NEMA 6 SIMPLIFIED SCHEMATIC DIAGRAM 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 cutouts. Their large, easy-to-read, 0.30 inch [7.6 mm] digits are available in a choice of red 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 36V dc power. Gain (span) and offset (zero) adjustments are performed with on-board, precision, 20-turn potentiometers. All decimal-point and range-change selections are made on a 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 entire assembly utilizes 100% soldered connections. Both power-supply and inputsignal connections are made via a reliable, 3-position, screw-type terminal block. The DMR20-0/5's DIP switch and potentiometers accommodate hundreds of inputvoltage / output-reading combinations. This practically eliminates the need for more costly, 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). . Figure 1 Simplified Schematic Diagram For full details go to: http://www.murata-ps.com/en/support/rohscompliance.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. Input MMin. Typ. Full Scale Input Range ➀ 4.9 Input Impedance 100 – Overvoltage Protection ➁ Max. Units 5.0 5.1 Volts – 140 KΩ – ±40 Volts Performance Sampling Rate 2.5 reading per second Accuracy (1 minute warm-up): ±0.05% FS ±1 Count Temperature Drift (0 to +60°C) – ±0.15 ±0.3 Counts/°C 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 Power Supply Requirements Display Display Type and Size 3½ digit, 0.30" [7.6 mm] high LED Polarity Indication "–" for negative VIN Overrange Indication "–1_ _ _" for negative inputs "1_ _ _" for positive inputs Physical/Environmental Operating Temperature Storage Temperature Humidity (non-condensing) 0 – +60 °C –20 – +75 °C 0 – 85 % Case Material Polycarbonate Weight 0.65 ounces (18.5 grams) TECHNICAL NOTES 1. Input Configuration: The DMR20-0/5 has its signal input LO terminal connected to its power supply ground terminal (TB1-2). This connection effectively places the meter's input in a single-ended configuration, that is, signal ground is connected directly to power ground. In some applications, single-ended inputs may cause groundloop induced errors (the meter's display becomes unstable). Applications which require electrical isolation between the input signal ground and the system power supply ground must use a separate transformer-isolated supply to power the meter. 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 metric nut and gasket, see the Mechanical Specifications section for more information. OPERATING AND SETUP INSTRUCTIONS As shipped, the DMR20-0/5 is factory calibrated to read "000" for a 0.0 V input and "1900" for a 5.0 V input. The following worst-case procedure assumes the DMR20-0/5 is completely miss-adjusted, i.e., both potentiometers and the DIP switches are randomly set. ➀ The DMR20-0/5 can also be used in most 0-10V applications. See the section 1. Set R7 (full scale span/gain adjust) fully counterclockwise, and R3 (zero/offset adjust) fully clockwise, roughly 22 turns, and place SW3SW6 to OFF (down position). ➁ INPUT LO (TB1-2) shares a common connection with power ground (also TB1–2). 2. Select DIP switch setting #1 in Table 1. on 0-10V inputs for more information. Overvoltage specifications apply to the INPUT HI (TB1-1) connection referenced to TB1-2. 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 DMR20-0/5-R-C +5 to +50Vdc V Supply, Red LED’s DMR20-0/5-G-C +5 to +50Vdc V Supply, Green LED’s Note: An M30 x 1.5 nylon metric hex nut and EPDM sealing gasket are supplied with each meter. The “-C” suffix indicates RoHS compliance Panel Knockout Tools: DMR20-1-KP DMR20-2-KP DMR20-3-KP 3. Apply a precision 0.0 V input and adjust R3 until the meter's display reads "000.” 1.22” [30.9 mm] punch (no keying notch) 1.21” [30.7 mm] punch with 4 keying notches Keyway Punch tool 5. Select the appropriate decimal point by setting SW and SW2 per Table 3. NOTE: The "000" to "1900" display readings referred to in the instructions above are for instructional purposes only. If other display readings are desired, refer to DIP-Switch Settings Tables 1 and 2 for SW3-SW6 settings. The initial setting of R3 fully clockwise and R7 fully counterclockwise is recommended in the adjustment procedure for all the following examples. 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) 1. Desired display readings are: 0.0 V input = "0.00" 5.0 V input = "6.00" Use DIP-switch setting #3 in Table 1 and enable decimal point DP2 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.” 2. Desired display readings While the DMR20-0/5 is optimized for operation with 0-5V inputs, its versatile input stage can also accommodate most 0-10V applications. The meter's zero/offset potentiometer (R3) has enough adjustment range to 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 DMR200/5 is used with 0-10V inputs. Example (0-10V Inputs) 1. Desired display readings are: are: 0.0 V input = "000" 5.0 V input = "800" 0.0 V input = "000" 10.0 V input = "500" Use DIP-switch setting #2 in Table 1. Apply 0.0 V and adjust R3 so the display reads "000.” Apply 5.0 V and adjust R7 so the display reads "800.” For these display readings, no decimal points are used, so set SW1 and SW2 both to ON. Use DIP switch setting #4 in Table 2. Apply 0.0 V and adjust R3 so the display reads "000.” Apply 10.0 V and adjust R7 so the display reads "500.” 3. Desired display readings Table 2 0-10 V DIP-Switch Setting are: 0.0 V input = ”000" 5.0 V input = ”250" Use DIP-switch setting #5 in Table 1 and enable decimal point DP1 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 reads ”250.” 4. Desired display readings are: 1.0 V input = ”000" 6.0 V input = ”090" Even though this input is positioned between +1.0 V and +6.0 V, it 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 this type of input, it is advisable to recheck both input levels to be sure the potentiometer settings did not affect one another. Table 1 0-5V DIP-Switch Settings ➂ 0.0 V Input 5.0 V Input SW3 SW4 SW5 SW6 0.0 V Input 10.0 V Input SW3 SW4 SW5 SW6 1 000 to 1400-1999 On Off Off Off 2 000 to 800-1400 Off On Off Off 3 000 to 600-800 Off Off On Off 4 000 to 380-600 Off On On Off 5 000 to 240-380 Off Off On On 6 000 to 200-300 Off On On On 7 000 to 180-280 On On On On Table 3 Decimal Point Settings (All Models) SW1 Off On Off On SW2 Off Off On On Decimal Point DP3 DP2 DP1 None 1 000 to 1200-1999 Off Off Off Off 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 6 000 to 120-190 Off Off On On 7 000 to 100-150 Off On On On 8 000 to 90-140 On On On On between -0.1 V and +6.0 V. As such, input signal ranges can be anywhere between -0.1 V and +6.0 V or between +1.0 V and +6.0 V, as long as the 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 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 Available Panel Knockout Tools: DMR20-1-KP DMR20-2-KP DMR20-3-KP 1.22” [30.9 mm] punch (no keying notch) 1.21” [30.7 mm] punch with 4 keying notches Keyway Punch tool Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. ISO 9001 and 14001 REGISTERED TB1 Recommended Wire Terminations: WIRE SIZE: 18 to 26 AWG (Solid or stranded) STRIPPING LENGTH: 0.20” [5.1 mm] Nominal This product is subject to the following operating requirements and the Life and Safety Critical Application Sales Policy: Refer to: http://www.murata-ps.com/requirements/ 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