The DR900 Universal Signal Conditioning Module can isolateand convert over 100 combinations of analog signal ranges. The DR900converts and transmits signals linearly proportional to the input,while the DR900-SQRT transmits the scaled square root of the inputsignal. This allows the DR900-SQRT to provide a signal that islinear to flow rate in applications utilizing a differential pressuretransducer.
DIP switch range selection eliminates the need to order andstock different modules for each input and output signal range, andallows quick and convenient setup for over 100 standard signalconversions. By utilizing the Field mode of calibration, the user cancustomize 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 modulesfeature optically isolated Input/Output signal circuits andtransformer 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 microprocessorbased design provides ease of field scaling and the onboard E2PROMstores scaling values for future recall. Both models come factoryprecalibrated for all input and output ranges. Factory or custom fieldscaling 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 panelspace. The units are equipped with universal mounting feet forattachment to standard DIN style rails, including top hat profile railaccording to EN50022 – 35 x 7.5 and 35 x 15 and G profile railaccording to EN50035-G32.
MODULE ISOLATION
DR900 modules feature "3-Way" Signal Isolation. The 3-Wayisolation is a combination of optical and transformer isolation. Theoptical isolation provides common mode voltage (CMV)isolation up to 1.5 kV between the sensor input and the process signaloutput. The DR900’s power is isolated from the sensor signal inputand the process signal output by a DC/DC transformer isolation circuit.
INPUTS
The DR900s accept a full range of process signal inputs and isolateand convert these signals to common industrial control signals.The input signal combinations are configured by making specific DIPswitch selections on the 10 position DIP switch.
OUTPUTS
As with the input choices, the process signal output of themodules is DIP switch selectable. A one position DIP switch is usedto select between the 1 mA/20 mA output ranges. The maximumoutput current signal is 22 mA with <600 Ohm output resistance andthe maximum output voltage signal is 11 V with >1 KOhm outputresistance.
ZERO AND SPAN
The input zero and span are set by first applying the minimum valuethen transitioning DIP switch S1-2 to store that value. Next, the fullscale value is applied and the DIP switch transition stores the value.The output scaling is performed in a similar manner but the output isdriven to the desired minimum and full scale values by the calibrationsource applied to the input. DIP switch S1-1 is used to store theminimum and full scale output values. The span is defined by:span = (full scale - minimum scale).
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 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%
INPUT RESISTANCE
Current: 10Ω
Voltage: 100 KΩ
Input Protection: Surge suppressor diodes
MAX OUPUT 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: 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). Factorycalibrated for loads of > 1 M Ω
GENERAL SPECIFICATIONS
Accuracy (Including Linearity):
Factory: ±0.1% of span max for all ranges except 1 mA, 2 mA, and 20mV. These ranges are accurate to ±0.2% of span max. All ranges canbe 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)
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