Martel Electronics DPM35G User Manual
PO Box 770 Londonderry, NH 03053
Fax:(603) 434-1653 • Tel: (603) 434-1433 • 1-800-821-0023
E-mail: sales@mar telcor p.com • www.martelcorp.com
DPM-35
Display:
Digits: 3 1/2 Digits (±1999 counts)
Type: 0.56" (14.2mm) Red or Green
7-segment LED
Polarity: Automatic, "–" displayed
Decimal Points: 3 Position, user selectable
Overload: Three lower order digits blank for
inputs>1999 and <–1999
Hold: Display Hold Function is standard
Inputs:
Ranges: ±200.0mV, ±2.000V, ±20.00V DC
Process Inputs, 4 to 20mA
(with optional adder board)
Configuration: Bipolar, Differential
Protection: ±350V DC, (±100V DC on 200mV
Range)
Impedance: >1 Megohm, (>10 Megohm on
200mV Range)
Loop Burden: 15Ω nominal
Performance:
Accuracy: ±(0.1% +1 count) typical
±(0.2% +2 counts) maximum
Conversion Rate: 3 per second
Normal Mode Rej.: >30 dB @ 60 Hz
Common Mode Range:±1V DC
Common Mode Rej.: >86 dB
Zero Adjustment: Automatic
Warmup: 10 minutes typical
Temperature Coeff.: ±100 ppm per °C typical
Environment:
Operating Range: 0 to 50 °C
Storage Range: –20 to 70 °C
Power Supply:
Voltage: +5V DC (±5%)
Current: 200mA
Mounting:
Window Mount, or Bezel Mount with optional bezel
Process Adder Board: Plugs onto DPM pins, adds approx. 0.6" (16mm)
to depth
Connections:
Pins, 0.025" square on 0.1" centers
Screw terminals on Process Adder Board
Dimensions
Specifications
Ranging DPMs for Voltage & Current
VIN RA** RB** I in RB**
2V 1 Meg 110 k 2 mA 100
20V 1 Meg 10 k 20 mA 10
200V 1 Meg 1 k 200 mA 1
1000V* 10 Meg*** 1 k
* When attentuating voltages above 20V care must be used to use components rated for higher voltages and that
proper creepage and clearance distances are used. Refer to UL3111 or IEC 1010.
** Resistors should be 1%, 1/4 wattt with a 100 or 50 ppm temperature coefficient (Note: Recalibration of span
required if accuracy better than ±1.4% is desired.)
*** Use (2) 4.99 Meg in series if 10 Meg is not available.
Wiring ConnectionsConnection Descriptions
PIN Description
V + +5V DPM Power Supply
GND DPM Power Supply Ground
DP COM Decimal Point Return
DP1 1XX.X
DP2 1X.XX
DP3 1.XXX
Input (+) Positive Input Signal
Input (–) Negative Input Signal
NC No Connection Required
HOLD Hold Last Display
The input common mode range is ± 1Vdc. If INPUT (–) is not
directly conected to GND, a 10k resistor network can be connected as shown to reduce unstable readings.
Unused pins should be left open.
CAUTION: Damage to the unit can occur if the power source
polarity is reversed, or greater than 6V is applied
between pins 1 & 2.
DPM-35
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