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Ranging DPMs for Voltage & Current
VIN
2V
20V
200V
1000V*
RA**
1 Meg
1 Meg
1 Meg
10 Meg***
RB**
110 k
10 k
1k
1k
I in
2 mA
20 mA
200 mA
RB**
100
10
1
*
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.
Connection Descriptions
Wiring Connections
PIN
V+
GND
DP COM
DP1
DP2
DP3
Description
+5V DPM Power Supply
DPM Power Supply Ground
Decimal Point Return
1XX.X
1X.XX
1.XXX
Input (+)
Input (–)
NC
HOLD
Positive Input Signal
Negative Input Signal
No Connection Required
Hold Last Display
1. Floating Input, DPM65: 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.
2. Single-Ended Input, DPM65S: The 10K resistor network is not
required. The INPUT (–) is internally connected to GND.
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-65
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