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DPM4 Digital Panel Meter System   by Versalent   Home

General Description DPM4 system diagram

The DPM4 digital panel meter system provides one to four 4-digit LED panel meters. The individual meter displays are tethered together with a ribbon cable and each includes its own panel-mount bezel for any row/column or random arrangement of meters. Signal and power wiring all connect to the control unit only. Meters can be configured for differential operation and each offers 19 different input range options. With all these options and a programmable 8-decimal-digit scaling factor there is no need for manual analog scale (pot) adjustments. Programmable scaling and offset allows the meters to convert ANY available input range to ANY display range from -9999 to +9999 with decimal points automatically placed as needed. The Configurator application requires just a few simple entries to generate and download the scaling factors. And the configuration can be changed to dynamically alter the scaling between lbs and kilos, nanometers and microns etc. in an instant -- through the RS232 command port.
 
Advantages Over Conventional Panel Meters

  • LOW COST -- A single DPM4 meter costs much less than a standard comparable digital panel meter, and up to 3 additional meters can be added for a very low incremental cost. The 3 tethered meters can be up to 18 feet away from the control unit. Also available as 2-channel DPM4/2 for even lower cost.

  • VERSATILE -- Conventional meters offer pot-adjustment for scaling, requiring user recalibration. And they typically offer no offsets (zero-input reads zero). DPM4 provides programmable, digital scaling/offsetting resulting in meters that can accept ANY input and produce ANY output from -9999 to +9999. Example: signal input range of -3.25V to +9.5V can produce displays of 0 to 100, or -75.35 to +9950! Anything you need using the highly precise 8-decimal-digit scale/offset factors.

  • DYNAMICALLY REPROGRAMMABLE -- Once configured, conventional meters are fixed and display a single scale. The DPM4 is dynamically reprogrammable so scaling can be changed from lbs to grams, AND it can temporarily display RS232-received messages like 'Err9', 'EOL-' -- anything displayable with 7-segment digits in solid or flashing formats. Meters individually dimmable to 8 brightness levels.

  • REMOTELY ACCESS METER READINGS -- Most conventional meters are stand-alone and do not transmit their measurements. The DPM4 can be remotely queried for its display values so that host systems can monitor and react to industrial or laboratory processes, generating alarms, or simply logging process values. The lowest RS232 port baud rate allows for many hundreds of feet of distance to a host system.

  • SMALL SIZE -- Each DPM4 unit is 2.6" X 1.6" X 1" (not including bezel) making them small enougn to replace existing meters, or even fit inside your product enclosure.
    [Requires moderate dexterity with small tools to install]

  • Online Simulator lets you try it now.
Detailed Description

Each of the up-to-4 independent meters provides 0.36" high red 7-segment LED digits. Once configured the DPM4 can operate autonomously, or can be dynamically reprogrammed to change scaling, or even display text messages provided by a remote host via RS232. Can be ordered with 2 or 4 analog channels and 0-3 additional displays, and the channels can be configured as separate or differential (CHX - CHY measurements).

The wide-ranging flexibility of multiple analog signals, multiple displays, selectable mapping between them, and so many available hardware ranges requires an organizing application to manage. Plus the calculation of scaling and offset factors would be difficult without automated help. The Versalent Configurator is a Windows application that generates all the scaling and offset factors required, and allows simple checkbox-selection of display-to-channel mappings. User input is reduced to entering a few simple values: (for each channel) a signal input range: low-value, and high value such as 0.0V and 4.00V . And the desired meter readings associated with these inputs such as 100 and 9000. The configurator computes the needed factors to make your display do it!. For unique display-to-channel mapping such as displaying the same value on multiple displays, or connecting analog signal #1 to display #3, a simple checkbox grid allows selection of those mappings.

A host can issue RS232 commands to alter the scaling/routing etc dynamically, and the Configurator helps there also. It can be used to generate alternate scale/offset values to change the display from lbs to kilograms for instance. The alternate values can be stored in your host and sent to the DPM4 whenever the display requires re-scaling, or a particular display needs to switch to a different analog channel. The Configurator can generate any DPM4 configuration needed and either send the values to an RS232 connected DPM4, or simply provide you the values needed by your host to command this configuration dynamically. The configuration messages are short and a meter can completely change its operation in the few milliseconds it takes to transmit the configuration messages.
Full Manual           DPM4 4-CH Meter System           Configurator Application

DPM4 channels are factory-configured to accept a specific signal input range. They should be purchased with the closest input range that encompasses your signal range. If your sensor generates 0-8V you should specify a 0-10V channel (rather than 0-20V) for the best measurement resolution. Multi-channel DPM4's need separate input range designators for each input channel
Available DPM4 Meter Input Ranges
Range # Input Range
0 0.0 to +200mv
2 0.0 to 1.0V
4 0.0 to 2.0V
6 0.0 to 2.50V
8 0.0 to 4.0V
10 0.0 to 5.0V
12 0.0 to 10.0V
14 0.0 to 20.0V
16 0.0 to 50.0V
18 4mA to 20mA
Range # Input Range
1 -200mv to +200mv
3 -1.0V to +1.0V
5 -2.0V to +2.0V
7 -2.50V to +2.50V
9 -4.0V to +4.0V
11 -5.0V to +5.0V
13 -10.0V to +10.0V
15 -20.0V to +20.0V
17 -50.0V to +50.0V
- -
Model Numbers:

Order as model number followed by hyphen-separated channel range numbers from the above table. Examples:
  • A 2-channel DPM4/2, channel 1: 0-200mv (Range= 0) , channel 2: -10 to +10V (Range = 13)
        Part Number is: DPM4/2-0-13

  • A 4-channel DPM4 channel 1: -5V to+ 5V (Range =11), channel 2: 4ma-20mA (Range =18), channel 3: -20V to +20V (Range =15), channel 4: -200mv to +200mv (Range =1)
        Part Number is: DPM4-11-18-15-1
DPM4 Settings/Size/Terminals