WILKERSON INSTRUMENT CO., INC.

DM4391 4/20 mADC Input DIN-Rail Mounted
Loop-Powered Isolator

Wici Logo
Home Button Wilkerson Instrument Co.    800-234-1343 Wilkerson Instrument Co Blog PageWilkerson Instrument Co LinkedIn PageShopping Cart

DM4391

DM4391
4/20 mADC Input
DIN-Rail Mounted
Loop-Powered Isolator

Select the Correct Model for Your Application

Model:
  DM4391-1   $211.00   Single Channel Isolator
    DM4391-2   $395.00   Dual Channel Isolator

Quantity:

 

Don't Forget Your Accessories
DR1 DIN-Rail, 35mm Symmetrical,
39 inches (1 meter)
$18.00
Quantity:
Specifications
 
  • Features
  • Description
  • Specifications
  • Dimensions
  • Connections
  • Provides a Fully Isolated 4/20 mAdc Output Proportional to 4/20 mAdc Input
  • Operating Power Derived from the Input Current
  • Single or Dual Channel
  • Plug-In Terminal Blocks
  • Standard DIN-Rail Mount with Easy Snap-On Snap-Off
  • User Write-On Label
  • Connections Readily Accessible from the Front
  • Permanent Warranty

The DM4391 is a loop powered isolator that provides an isolated 4/20mA output proportional to a 4/20 mA input.

All operating power for the circuit is derived from the 4/20 mA input current.

The product is useful for breaking ground loops and for creating a 4/20 mA output in locations where primary power is not available.

A unique feedback system allows the DM4391 to achieve the same linearity as powered isolators and to drive loads from 0 ohms to 1000 ohms without affecting linearity.

The product is available as a single channel or a dual channel unit. The dual channel unit has two totally separate circuits that are fully isolated from each other.

Connections are made via two 4-pin plug-in terminal blocks. These terminal blocks allow the product to be removed without unwiring the connections.

TYPICAL APPLICATIONS
Eliminates ground loops and common mode signals in 4/20 mA current loops for isolation, buffering, noise reduction,  especially where line power is NOT available.

INPUT
4/20 mA

INPUT VOLTAGE DROP
5+(I(mA)*(Load+7.65)/850)
Typical Drop

Drop (V)
6.8
9.2
12.7
18.6
24.5
30.3
Load(ohms) at 20 mA
0
100
250
500
750
1000

DM4391 Load Characteristics

OUTPUT CURRENT
4/20 mA

DRIVE CAPABILITY
0 to 1000 ohms

OUTPUT RIPPLE (Peak-to-Peak)
<0.1% of span

ISOLATION
Breakdown, Output / Input > 1000 VAC rms sinewave
Resistance > 500 megohms

LINEARITY
± 0.02% of span

COMMON MODE REJECTION
>100 dB, DC to 60 Hz
Voltage Rating >1000 VAC sinewave

OPERATING TEMPERATURE
14 to 140 °F/-10 to +60 °C

TEMPERATURE STABILITY
+ (0.02% of span)/°C

DIN Mod Series Dimension Drawing

  DM4391-1 DM4391-2
Terminal 1
Terminal 2
Terminal 3
Terminal 4
Terminal 5
Terminal 6
Terminal 7
Terminal 8
Input +
Input -
No Connection
No Connection
Output +
Output -
No Connection
No Connection
Input 1 +
Input 1 -
Input 2 +
Input 2 -
Output 1 +
Output 1 -
Output 2 +
Output 2 -
Specifications    Manual

Solutions Provider for Signal Conditioning and
Process Control Instrumentation