Impulse DSCA30, DSCA31 User Manual

High Performance Signal Conditioners

DSCA30/31

Analog Voltage Input Signal Conditioners, Narrow Bandwidth

Description

Each DSCA30/31 voltage input module provides a single channel of analog

input which is filtered, isolated, amplified, and converted to a high level voltage

output. Signal filtering is accomplished with a five-pole filter which provides

85dB of normal-mode-rejection at 60Hz and 80dB at 50Hz. An anti-aliasing

pole is located on the field side of the isolation barrier, and the other four poles

are on the system side. After the initial field-side filtering, the input signal is

chopped by a proprietary chopper circuit. Isolation is provided by transformer

coupling, again using a proprietary technique to suppress transmission of

common mode spikes or surges.

Module output is either voltage or current. For current output models a dedicated

loop supply is provided at terminal 3 (+OUT) with loop return located at terminal

4 (-OUT). The system-side load may be either floating or grounded.

Special input circuits provide protection against accidental connection of

power-line voltages up to 240VAC and against transient events as defined by

ANSI/IEEE C37.90.1. Protection circuits are also present on the signal output

and power input terminals to guard against transient events and power reversal.

Signal and power lines are secured to the module using screw terminals which

are in pluggable terminal blocks for ease of system assembly and reconfiguration.

The modules have excellent stability over time and do not require recalibration,

however, zero and span settings are adjustable up to ±5% to accommodate

situations where fine-tuning is desired. The adjustments are made using

potentiometers located under the front panel label and are non-interactive for

ease of use.

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Features

 Accepts Millivolt and Voltage Level Signals

 Industry Standard Output of either 0 to 10V/±10V,

0 to 20mA, or 4 to 20mA

 1500Vrms Transformer Isolation

 ANSI/IEEE C37.90.1 Transient Protection

 Input Protected to 240VAC Continuous

 True 3-Way Isolation

 Wide Range of Supply Voltage

 160dB CMR

 85dB NMR at 60Hz, 80dB at 50Hz

 ±0.03% Accuracy

 ±0.01% Linearity

 Easily Mounts on Standard DIN Rail

 C-UL-US Listed

 CE and ATEX Compliant

DSCA

Figure 1: DSCA30/31 Block Diagram

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For information call 800-444-7644

High Performance Signal Conditioners

DSCA

Specifications

Typical at TA = +25°C and +24V voltage supply

Model DSCA30 DSCA31

Input Range ±10mV to +100mV ±1V to ±40V

Input Bias Current ±0.5nA ±0.05nA

Input Resistance

Normal 50MΩ 500kΩ min Power Off 65kΩ 500kΩ min Overload 65kΩ 500kΩ min

Input Protection

Continuous 240Vrms max *

Transient ANSI/IEEE C37.90.1 *

Output Range See Ordering Information

Load Resistance (I

Current Limit 8mA (V

Output Protection

Short to Ground Continuous *

Transient ANSI/IEEE C37.90.1 *

CMV, Input to Output, Input to Power

Continuous 1500Vrms max *

Transient ANSI/IEEE C37.90.1 *

CMV, Output to Power

Continuous 50VDC max *

CMR (50Hz or 60Hz) 160dB *

Accuracy

(1)

Nonlinearity ±0.01% Span *

Adjustability ±5% Zero and Span *

Stability

Input Offset ±0.5µV/°C ±5µV/°C

Output Offset ±6ppm/°C (V

Zero Suppression ±50ppm(Vz)

Gain ±35ppm/°C ±55ppm/°C

Output Noise, 100kHz BW 250µVrms (V

Bandwidth, 3dB 3Hz *

NMR 85dB at 60Hz, 80dB at 50Hz *

Response Time, 90% Span 165ms *

Power Supply

Voltage 15 to 30VDC *

Current 25mA (V

Sensitivity ±0.0001%/% *

Protection

Reverse Polarity Continuous *

Transient ANSI/IEEE C37.90.1 *

Environmental

Operating Temp. Range 40°C to +80°C *

ATEX Group II, Category 3 20°C to +40°C *

Storage Temp. Range 40°C to +80°C *

Relative Humidity 0 to 95% Noncondensing *

Emissions EN61000-6-4 ISM, Group 1 *

Radiated, Conducted Class A *

Immunity EN61000-6-2 ISM, Group 1 *

R F Performance A ±0.05% Span Error *

ESD,EFT,Surge,Voltage Dips Performance B *

Mechanical Dimensions 2.95" x 0.89" x 4.13" *

(h)(w)(d) (75mm x 22.5mm x 105mm)

Mounting DIN EN 50022 -35x7.5 or -35x15 rail *

NOTES:

* Same specification as DSCA30.

(1) Includes nonlinearity, hysteresis and repeatability.

is the nominal input voltage that results in 0V or 0mA output.

(2) V

) 600Ω max *

OUT

), 30mA (I

OUT

±0.03% Span *

), ±20ppm/°C (I

OUT

(2)

/°C *

), 1µArms (I

OUT

), 55mA (I

OUT

Ordering Information

Model Input Range Output Range

DSCA30-01 -10mV to +10mV 1

DSCA30-02 -50mV to +50mV 1

DSCA30-03 -100mV to +100mV 1

DSCA30-04 -10mV to +10mV 2, 3, 4

DSCA30-05 -50mV to +50mV 2, 3, 4

DSCA30-06 -100mV to +100mV 2, 3, 4

DSCA30-07 0 to +10mV 2, 3, 4

DSCA30-08 0 to +50mV 2, 3, 4

DSCA30-09 0 to +100mV 2, 3, 4

DSCA31-01 -1V to +1V 1

DSCA31-02 -5V to +5V 1

DSCA31-03 -10V to +10V 1

DSCA31-04 -1V to +1V 2, 3, 4

DSCA31-05 -5V to +5V 2, 3, 4

DSCA31-06 -10V to +10V 2, 3, 4

DSCA31-07 -20V to +20V 1

DSCA31-08 -20V to +20V 2, 3, 4

DSCA31-09 -40V to +40V 1

DSCA31-10 -40V to +40V 2, 3, 4

DSCA31-11 0 to +1V 2, 3, 4

DSCA31-12 0 to +5V 2, 3, 4

DSCA31-13 0 to +10V 2, 3, 4

DSCA31-14 0 to +20V 2, 3, 4

DSCA31-15 0 to +40V 2, 3, 4

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Output Ranges Available

Output Range Part No. Suffix Example

1. -10V to +10V NONE DSCA30-01

2. 0V to +10V NONE DSCA30-04

3. 4 to 20mA C DSCA30-04C

4. 0 to 20mA E DSCA30-04E

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DSCA

Installation Notes:

1.) This Equipment is Suitable for Use in Class I, Division 2, Groups A, B, C, D, or Non-Hazardous Locations Only.

2.) Warning - Explosion Hazard - Substitution of Components May Impair Suitability for Class I, Division 2.

3.) Warning - Explosion Hazard - Do Not Disconnect Equipment Unless Power Has Been Switched Off or The

Area is Known to be Non-Hazardous.

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