Omega Products DR900 User Manual



Universal Signal Conditioning Module

DR900

$

209

All Models

⻬ 3-Way Isolation a

of Analog Signals

⻬ Universal Conversion Module–

Inputs and Outputs Selected
Via Dip Switch Settings

⻬ Over 100 Input and Output

Analog Conversion
Combinations

⻬ Choose Linear or Square Root

Extraction Model

⻬ All Ranges Are Factory

Precalibrated–Custom Field
Calibration is Available for
All Ranges While Maintaining
the Factory Calibration
for Future Use

⻬ 11 to 36 Vdc/24 Vac

Module Power

The DR900 universal signal
conditioning module can isolate
and convert over 100 combinations
of analog signal ranges. The DR900
converts and transmits signals
linearly proportional to the input,
while the DR900-SQRT transmits
the scaled square root of the input
signal. This allows the DR900-SQRT
to provide a signal that is linear to
flow rate in applications utilizing a
differential pressure transducer.

DIP switch range selection
eliminates the need to order and
stock different modules for each
input and output signal range, and
allows quick and convenient setup
for over 100 standard signal
conversions. By utilizing the field
mode of calibration, the user can
customize the input and output
scaling for odd applications,
including reversal of the output
relative to the input.

In addition to the conversion
capabilities, the DR900 modules
feature optically isolated input/output
signal circuits and transformer
isolated power to input and power to
output circuits.

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The modules’ overall full scale
accuracy typically exceeds 0.05%
depending upon range selection
and scaling. The microprocessor
based design provides ease of field
scaling and the onboard EEPROM
stores scaling values for future
recall. Both models come factory
precalibrated for all input and output
ranges. Factory or custom field
scaling can be selected by a simple
mode switch change.

The DR900 can be factory
recalibrated in the field if desired.
The modules environmental
operating temperature range is

-20 to 65°C (-4 to 149°F). DIN rail
mounting saves time and panel
space.

The units are equipped with
universal mounting feet for
attachment to standard DIN style
rails, including top hat profile rail
according to EN50022 – 35 x 7.5
and 35 x 15 and G profile rail
according to EN50035-G32.

Module Isolation

DR900 modules feature “3-way”
signal isolation. The 3-way isolation
is a combination of optical and
transformer isolation. The optical
isolation provides common mode
voltage (CMV) isolation up to 1.5 kV
between the sensor input and the
process signal output. The DR900s
power is isolated from the sensor
signal input and the process signal
output by a DC/DC transformer
isolation circuit.

Inputs

The DR900s accept a full range of
process signal inputs and isolate
and convert these signals to
common industrial control signals.
The input signal combinations are
configured by making specific DIP
switch selections on the 10-position
DIP switch.

DR900, $209, shown
smaller than actual size.

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Dimensions: mm (in)

79.2

(3.12)

Outputs

As with the input choices, the
process signal output of the
modules is DIP switch selectable.
A one position DIP switch is used
to select between the 1 mA/20 mA
output ranges. The maximum
output current signal is 22 mA with
<600 Ω output resistance and the
maximum output voltage signal is
11 V with >1 kΩ output resistance.

Zero and Span

The input zero and span are set by
first applying the minimum value
then transitioning DIP switch S1-2
to store that value. Next, the full
scale value is applied and the DIP
switch transition stores the value.

The output scaling is performed in a
similar manner but the output is
driven to the desired minimum and
full scale values by the calibration
source applied to the input. DIP
switch S1-1 is used to store the
minimum and full scale output
values. The span is defined by:
span = (full scale - minimum scale).

27.5

(1.08)

(4.20 REF)

106.7

Specifications

Input Ranges:

0 to 20 mV, 0 to 50 mV,
0 to 100 mV, 0 to 200 mV,
0 to 500 mV, 0 to 1V, 0 to 2V,
1 to 5V, 0 to 5V, 0 to 10V,
0 to 20V, 0 to 50V, 0 to 100V,
0 to 1 mA, 0 to 2 mA, 0 to 5 mA,
0 to 10 mA, 4 to 20 mA, 0 to 20 mA,
0 to 50 mA, 0 to 100 mA

Output Ranges:

0 to 5V, 0 to 10V, 0 to 1 mA,
4 to 20 mA, 0 to 20 mA
Zero/Span Adjustments: Digital
(DIP Switch Transition)

MAX INPUT SIGNAL
Current Input: 110 mA dc, 1.1 Vdc
Voltage Inputs:

Terminal 7- 1 Vdc +10%;
Terminal 8- 10 Vdc +10%;
Terminal 9- 100 Vdc +10%

INPUT RESISTANCE
Current: 10 Ω
Voltage: > 100 kΩ

Input Protection: Surge

suppressor diodes

MAX OUTPUT CURRENT
Current Output: 22 mA
Voltage Output: 10 mA

LOAD RESISTANCE
Current Output: ≤600 Ω
Voltage Output: ≥1 kΩ

OUTPUT COMPLIANCE
Current: 4 to 20 mA, 0 to 20 mA:

12V min (≤600 Ω)
0 to 1 mA: 10V min (≤10 kΩ)
Voltage: 10 Vdc across a min
1 kΩ load (10 mA). Factory
calibrated for loads of > 1 MΩ.

GENERAL SPECIFICATIONS
Accuracy (Including Linearity):

Factory: ±0.1% of span max for all
ranges except 1 mA, 2 mA, and
20 mV. These ranges are accurate
to ±0.2% of span max. All ranges
can be field calibrated to 0.1% of
span max.
Resolution: 0.01% full scale input,

0.01% full scale output
Step Response: 300 msec
(to within 99% of full scale)
Power: 11 to 36 Vdc, 3 W max
or 24 Vac, ±10%, 50/60 Hz,

4.8 VA max

Isolation Level Input to Output:

1.5 kV @ 50/60 Hz, 1 min

ENVIRONMENTAL CONDITIONS
Operating Temperature Range:

-20 to +65°C (-4 to 149°F)

Storage Temperature Range:

-40 to 85°C (-40 to 185°F)

Operating and Storage Humidity:

85% RH max (non-condensing)
from -20 to 65°C (-4 to 149°F)

Temperature Coefficient:

±0.01%/°C (100 ppm/°C) max
Construction: Case body is black
high impact plastic

Connections: 14 AWG max
Mounting: Standard DIN top hat (T)

profile rail according to EN50022

- 35 x 7.5 and 35 x 15 and G profile
rail according to EN50035-G32.
Weight: 128 g (4.5 oz)

AVAILABLE FOR FAST DELIVERY!

To Order

Model Number Price Description

DR900 $209 Linear universal signal conditioning module

DR900-SQRT 209 Square root universal signal conditioning module

iDRN-PS-1000 150 Power supply (switching), 95 to 240 Vac input, 24 Vdc output @ 850 mA

RAIL-35-1 10 35 mm (1.4") DIN rail, 1 m (3.3') length
RAIL-35-2 19 35 mm (1.4") DIN rail, 2 m (6.6') length

Comes complete with operator’s manual.
Ordering Example: DR900, linear universal signal module and OMEGACARE

(adds 1 year to standard 1 year warranty), $209 + 20 = $229.

To Order, Call or Shop Online at omega.com

(Specify Model Number)

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($20) 1 year extended warranty for DR900

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