DMS-20PC-4/20 View Datasheet(PDF) - DATEL Data Acquisition products
Part Name
Description
MFG CO.
DMS-20PC-4/20
DATEL Data Acquisition products
'DMS-20PC-4/20' PDF : 5 Pages View PDF
®
®
Actual Size
Order online at www.datel.com
DMS-20PC-4/20 Series
New! Bipolar and Positive Reading Models
Subminiature
4-20mA Loop-Powered
3½ Digit, LED ProcessMonitors
Features
• Industry's first loop-powered meter
with a large, easy-to-read, LED display!
• Self-powered, no external
supply required
• Unipolar, Bipolar and Positive Reading
Models
• Large, 0.37"/9.4mm digits
• Excellent display intensity
• Constant 5V max. total loop drop
• High-quality, 20-turn, span (gain) and
zero (offset) adjustments
• DIP-switch selectable range and
decimal points
• Hundreds of input/readout combinations
• Vibration-resistant package; Reliable
screw-terminal input connections
The DMS-20PC-4/20 Series are the world's first loop-powered digital panel meters
with a large, easy-to-read, bright red, LED display. All operating power is derived
directly from the loop current itself—no external power supply is required! The large,
0.37"/9.4mm digits exhibit uniform intensity over the entire 4-20mA operating range.
Additionally, the total maximum loop voltage drop is only 5V! Users no longer have to
settle for difficult-to-read LCD displays in loop-powered applications.
Both gain (span) and offset (zero) adjustments are performed with on-board, preci-
sion, 20-turn potentiometers. All decimal-point and range-change selections are
made on a six-position DIP switch featuring vibration-resistant, gold-plated contacts.
Unlike competitive meters, there are no jumpers or solder gaps to open or close.
Connections to the current loop are made via a reliable, two-position, screw-type
terminal block.
The DMS-20PC-4/20's DIP switch and adjustment potentiometers accommodate
hundreds of different input-current/output-reading combinations. This versatility practi-
cally eliminates the need to order more costly, long-lead-time, factory-customized "spe-
cials" in applications in which several different-range meters are required. An optional
bezel assembly, featuring screw fasteners and a rubber seal, simplifies panel mounting
and provides excellent resistance to environmental dust and moisture. All these out-
standing features combine to make the DMS-20PC-4/20 Series the perfect meters for
prototype and OEM 4-20mA current-loop instrumentation.
R3
R7
ZERO GAIN
ADJUST ADJUST
BAND-GAP
REFERENCE
CIRCUIT
3½ DIGIT A/D
CONVERTER
12 3
DATA
DP1 DP2 DP3
ON
DIP SWITCHES
123 4 56
+5V
–5V
DC/DC
CONVERTER
CURRENT TO
VOLTAGE
CONVERTER
Figure 1. DMS-20PC-4/20 Series Simplified Schematic
TB1
+–
+–
LOOP INPUT
DATEL, Inc., Mansfield, MA 02048 (USA) • Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 • E–mail: sales@datel.com • Internet: www.datel.com
Share Link: 