Wilkerson Instrument DR4302 Operating Manual

DR4302

DC INPUT

DUAL OUTPUT

ISOLATED TRANSMITTER

DIN RAIL MOUNT

DESCRIPTION

The DR4302 provides two
individually isolated DC current
outputs proportional to a DC voltage
or current input. The input and
output are ranged at the factory, but
Zero and Span controls provide

±15% adjustability.
The DR4302 provides 3 way

isolation between input, output, and
power source.

The isolation makes the product
useful for measuring input signals
with high common mode voltages
and for breaking ground
connections to eliminate ground
loops. It can also be used for signal
conversion and scaling as well.

The screw terminal blocks plug into
the case, which allows easy wiring
and removal of products.

All of the DR Series of products
provide transient protection to help
eliminate damage from lightning and
from other transients coupled onto
the power and signal leads by
system wiring.

INSTALLATION

The DR Series of products mount
on standard 35 mm DIN rails. Install
by hooking the top of the case’s latch
onto the top of the DIN rail. Then
push down on the case, letting it
pivot on the DIN rail. The bottom
slide of the mount will snap behind
the rail and secure the product.

To remove, insert a screwdriver into
the hole on the metal latch on the
bottom of the case, and pull the latch
down until it allows the front of the
case to be lifted up.

WARRANTY

The DR4302 Series of products carry
a limited 3 year warranty. In the
event of a failure due to defective
material or workmanship, the unit
will be repaired or replaced at no
charge.

CALIBRATION

The DR4302 is factory calibrated to the input and output noted on the
case side label. Terminal connections are shown on the front label.
To make field adjustments to the product:

1. Remove the circuit board from the case by squeezing the
2 locking tabs (see diagram below) and pulling the case
front, with the circuit board, out of the case.

2. Connect a calibrator to the input terminals.

3. Connect an accurate voltmeter or current meter to the
Output 1 terminals.

4. Apply power to the unit.

5. Set the input for its zero scale and adjust the Zero control for

zero scale output.

6. Set the input for its full scale and adjust the Span control for

full scale output.

7. Repeat once or twice until no further adjustment is required.

8. Repeat steps 3 through 7 for Output 2.

1 2

SPECIFICATIONS

INPUT RANGE

Voltage
1/5 V, 0/10 V

Current

0/1 mA, 0/20 mA
4/20 mA, 10/50 mA

INPUT IMPEDANCE

Voltage

600 kilohms

Current
Current Input Input Shunt

Value

0/1 mA

0/20 mA

4/20 mA

10/50 mA

OUTPUT

Current

4/20 mA
Compliance > 12 V Per Output
at 24 V Power

1000 OHM

100 OHM
125 OHM

20 OHM

CASE DIMENSIONS INCHES [mm]

BANDWIDTH

-3db at 3 Hz
OUTPUT RIPPLE

(peak to peak)

<0.1% of span

ACCURACY
±0.1% of span

LINEARITY
±0.05% of span

COMMON MODE REJECTION

100 dB, DC to 60 Hz

ISOLATION,
OUTPUT/INPUT/POWER

>500 megohms
1000 VPeak

OPERATING TEMPERATURE

14°F to 158°F/-10°C to 70°C

TEMPERATURE STABILITY

±(0.01% of span)/°C max

POWER

21 to 28 VDC, 60 mA max

TWO-WIRE TRANSMITTER WIRING

In installations where isolation between the power supply and the input

terminals is not required, the DR Series power supply can also be used to
power a Two-Wire Transmitter (see drawing below). If isolation is required,
a separate power supply must be used to power the Two-Wire Transmitter.

3

Specifications Are Subject To Change Without Notice. © 2007 Wilkerson Instrument Co., Inc. DWG#W103853 3/07

4