Application Information
1.Chassis Mounting Considerations: In order to minimize self-heating, DMS-PS-CM power supplies should always be mounted in either a vertical or horizontal position. Avoid mounting units upside-down or in close proximity to other heat-generating devices. Also, be sure to use the mounting hardware described in Figure 4 below in order to ensure a secure, vibration-resistant installation.
| Screw, |
| Split Lock Washer, |
| Flat Washer |
Panel/Chassis | Threaded |
|
| Hole |
| Screw, |
| Flat Washer |
Panel/Chassis | |
Hole | Flat Washer, |
Split Lock Washer, |
| Nut |
Figure 4. Chassis Mounting
2.Bipolar Operation (See Figure 5): DMS-PS-CM power supplies’ fully isolated outputs allow for the generation of bipolar (positive and nega- tive) supply voltages. Bipolar outputs can be used to power dual-supply operational amplifiers, as well as any other type of instrumentation that requires bipolar supply voltages. However, please keep in mind that when connecting and operating any two outputs in this fashion, each output retains its maximum current rating.
DMS-PS6-CM
– V1 + – V2 + – V3 +
DMS-PS-CM Series
High Efficiency, AC/DC Instrumentation Power Supplies with Individually Isolated Outputs
3.Model Selection & Energy Conservation: In order to achieve the lowest possible energy consumption, be sure to determine your application’s total current requirements. This is especially true when using DMS-PS-CM supplies to power DATEL’s energy-efficient LED and/or LCD display digital panel meters (DPMs) and process monitors. In general, choose a power supply that will accommodate your maximum current consumption plus a 20% margin. Choosing the lowest-wattage model suitable for a given appli- cation will provide lower procurement costs and lower long-term operating costs.
When calculating total current requirements in installations employing three or more DMS-Series meters, it is acceptable practice to use each meter’s typical current consumption rating. However, be sure to consult the relevant product datasheets for all instrumentation comprising your application.
For applications where DMS-PS-CM power supplies will be powering only Murata Power Solution’s DPM’s, a 5-Watt DMS-PS3-CM can power up to four, standard intensity (‘-RS’ suffix) red-LED DMS-30PC meters: two meters on V1, and one meter each on V2 and V3. The same DMS-PS3-CM could also be used to power over 40 low-power red DMS-30PC meters (‘-RL’ suffix), or over 800 DMS-30LCD non-backlit meters! Of course, these statements are made without regard to ground-loop problems that may be encountered when powering 800 DPM’s from a single power supply.
Scope Probe
Oscilloscope
V1
– 
+
BW = 20MHz
DMS-PS-CM
Figure 6. Measuring Ripple and Noise
