DMS-20PC-0/5 Series www.murata-ps.com 0-5V and 0-10V Input 3 Digit, LED Display Process Control Monitors Murata Power Solutions DMS-20PC-0/5 Series are the world s smallest, full-featured, FEATURES 0-5V input process control monitors. Their large, easy-to-read, 0.37 /9.4mm LED displays Accepts 0-5V and 0-10V inputs are available in a choice of 4 LED color/intensity options: standard red, standard green, Large, easy-to-read, 0.37 /9.4mm LED display super-bright red, and low-power red. Two power supply input ranges are also available: Choice of 5 LED power/color options the industry-standard +5V and a wide-range +5V to +40V (which typically draws 9mA at +24V). High input impedance, 100k Gain (span) and offset (zero) adjustments are performed with on-board, precision, +5V to +40V model draws 9mA typ. 20-turn potentiometers. All decimal-point and range-change selections are made on an Miniature size: 1.38 x 1.25 x 0.95 8-position, vibration-resistant, gold-plated DIP switch. Unlike competitive meters, there are no jumpers or solder gaps to open or close, and to further enhance reliability, the High-quality, 20-turn, span (gain) and zero (offset) entire assembly utilizes 100% soldered connections. Both power-supply and input-signal adjustments connections are made via reliable screw-type terminal blocks. DIP-switch selectable range and decimal points The DMS-20PC-0/5 s DIP switch and potentiometers accommodate hundreds of input- Vibration-resistant package Reliable screw-terminal voltage/output-reading combinations. This practically eliminates the need for more costly, input connections long-lead-time, factoryspecial in applications which use several different-range meters. A supplied bezel assemblyfeaturing metal fasteners and a rubber gasketsimpli es Hundreds of different input/readout combinations panel mounting and also provides excellent resistance to environmental dust and moisture. All these outstanding features combine to make the DMS-20PC-0/5 the perfect meter for prototype and OEM, 0-5V input, process control monitoring. SIMPLIFIED SCHEMATIC DIAGRAM 3 Digit DATA A/D Converter 5V +5V DP1 DP2 DP3 N.C. R3 R7 Zero Gain ON Adjust Adjust DIP Switches 1 23 4586 7 N.C. +5V DC/DC 5V Band-Gap Converter Reference 1 2 1 2 Circuit TB1 TB2 + + +5V 5V HI LO +V V Signal Input Power Supply Input For full details go to www.murata-ps.com/rohs Figure 1. DMS-20PC-0/5 simpli ed schematic www.murata-ps.com/support MPM DMS20pc 5V.C01 Page 1 of 4DMS-20PC-0/5 Series 0-5V and 0-10V Input 3 Digit, LED Display Process Control Monitors Performance/Functional Speci cations TECHNICAL NOTES Typical at TA = +25C, unless otherwise noted. 1. Input Con guration: The DMS-20PC-0/5 has its input low terminal Inputs Min. Typ. Max. Units (TB1L) internally connected to the power supply ground terminal 4.9 5.0 5.1 Volts Full Scale Input Range (TB2). This connection effectively places the meter s input in a Input Impedence 100 140 k single-ended con guration. In some applications, single-ended inputs can cause ground-loop induced errors (the meter s display becomes 40 Volts Overvoltage Protection unstable or bounces). This occurs because the LED drive currents Performance ow through both the V terminal and the signal LO terminal. Sampling Rate 2.5 reading per second If suspected ground-loop errors are encountered, and the input signal Accuracy (1 minute warm-up): 0.05%FS 1 Count LO terminal is externally connected to V somewhere else in the Temperature Drift (0 to +60C) 0.15 0.3 Cnts/C system, try removing the connection to TB1LO. Inputs which have Power Supply Requirements no ground-return connection to V (commonly referred to as oating DMS-20PC-0/5-5RS (90mA max.) +4.75 +5.00 +5.25 Volts input) must have their most negative potential tied to TB1LO Please consult Murata Power Solutions for more information. DMS-20PC-0/5-5GS, -5BS (120mA max.) +4.75 +5.00 +5.25 Volts Applications which require electrical isolation between the input DMS-20PC-0/5-5RL 15mA max.) +4.75 +5.00 +5.25 Volts signal source and the system power supply must use a separate DMS-20PC-0/5-5RH (90mA max.) +4.75 +5.00 +5.25 Volts transformer-isolated supply to power the meter. DMS-20PC-0/5-24RL (15mA max.) +4.75 +40.0 Volts 2. Panel Mounting: In most standard through-the-panel installations, Display the DMS-20PC-0/5 must be secured to the panel with DMS-BZL4 Display Type and Size 3 digit, 0.37 /9.4mm high LED bezel assemblies (see the Mechanical Speci cations section for more Polarity Indication for negative VIN information). Overrange Indication1 for negative inputs1 for positive inputs Physical/Environmental Operating Temperature 0 +60 C OPERATING AND SETUP INSTRUCTIONS Storage Temperature 20 +75 C As shipped, the DMS-20PC-0/5 is factory calibrated to read000 for Humidity (non-condensing) 0 95 % a 0.0V input and1999 for a 5.0V input. The following worst-case Case Material Polycarbonate procedure assumes the DMS-20PC-0/5 is completely mis-adjusted, i.e., Weight 0.6 ounces (17 grams) both potentiometers and the DIP switches are randomly set. 1. Set R7 (full scale span/gain adjust) and R3 (zero/offset adjust) fully The DMS-20PC-0/5 can also be used in most 0-10V applications. See the section clockwise, roughly 22 turns, and place SW1-SW8 to OFF (down on 0-10V inputs for more information. See Note 3 on Table 1. INPUT LO (TB1L) is internally connected to the power return (TB2). position). Overvoltage speci cations apply to the INPUT HI (TB1+H) connection. 2. Select DIP switch setting 1 in Table 1. 3. Apply a precision 0.0V input and adjust R3 until the meter s display reads000. 4. Apply a precision 5.0V input and adjust R7 until the meter s display Ordering Information reads1999. Repeat steps 3 and 4 to make sure the adjustments DMS-20PC-0/5-5RS-C +5V supply, standard-intensity red LED s do not affect one another. DMS-20PC-0/5-5GS-C +5V supply, standard-intensity green LED s 5. Select the appropriate decimal point by setting SW6, SW7 or SW8 to DMS-20PC-0/5-5BS-C +5V supply, bright blue LED s ON (DP1, DP2 or DP3 respectively). DMS-20PC-0/5-5RL-C +5V supply, low-power red LED s DMS-20PC-0/5-5RH-C +5V supply, high-intensity red LED s NOTE: The000 to1999 display readings referred to in the DMS-20PC-0/5-24RL-C +5V to +40V supply, low-power red LED s instructions above are for illustrative purposes only. If other display readings such as000 to1200 are desired, refer to the DIP- DMS-20-CP Panel cutout punch Switch Settings Tables for SW1-SW4 settings. (SW5 is reserved for future use, it has no affect on display operation.) The initial setting Note: A DMS-BZL4 bezel assembly with a sealing gasket is supplied with each meter. of R3 and R7 fully clockwise is recommended in the adjustment procedure for all the following examples. See www.murata-ps.com/dpm-availability for model-speci c availability. www.murata-ps.com/support MPM DMS20pc 5V.C01 Page 2 of 4