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
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.
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 E2PROM
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.
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 DR900’s power is isolated from the sensor signal input
and the process signal output by a DC/DC transformer isolation circuit.
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.
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 Ohm output resistance and
the maximum output voltage signal is 11 V with >1 KOhm output
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).
0 to 20 mV, 0 to 50 mV, 0 to 100 mV, 0 to 200 mV,
0 to 500 mV, 0 to 1 V, 0 to 2 V, 1 to 5 V, 0 to 5 V, 0 to 10 V,
0 to 20 V, 0 to 50 V, 0 to 100 V, 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 5 V, 0 to 10 V, 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%
MAX OUPUT CURRENT
Current Output: 22 mA Voltage Output: 10 mA
Current Output: =600 Ω Voltage Output: =1 KΩ
Current: 4 to 20 mA, 0 to 20 mA: 12 V min (=600 Ω.)
0 to 1 mA: 10 V min (=10 K Ω) Voltage: 10 Vdc across a min 1 K. load (10 mA). Factory
calibrated for loads of > 1 M Ω
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
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)
† All amounts shown in USD Note: Supplied with complete operator’s manual. Ordering Example: (1) DR900 Linear universal signal conditioning module, $209.00