Impulse DSCA40, DSCA41 User Manual

High Performance Signal Conditioners

DSCA40/41

Analog Voltage Input Signal Conditioners, Wide Bandwidth

Description

Each DSCA40/41 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. 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 0-10V,

 1500Vrms Transformer Isolation

 ANSI/IEEE C37.90.1 Transient Protection

 Input Protected to 240VAC Continuous

 True 3-Way Isolation

 Wide Range of Supply Voltage

 100dB CMR

 3 kHz Signal Bandwidth

 ±0.03% Accuracy

 ±0.01% Linearity

 Easily Mounts on Standard DIN Rail

 C-UL-US Listed

 CE and ATEX Compliant

DSCA

±10V, 0-20mA, or 4-20mA

Figure 1: DSCA40/41 Block Diagram

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High Performance Signal Conditioners

DSCA

Specifications

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

Model DSCA40 DSCA41

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) 100dB *

(1)

Accuracy

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 Bandwidth 750µVrms (V

Bandwidth, 3dB 3kHz *

NMR 100dB/decade above 3kHz *

Response Time, 90% Span 170µs *

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 *

NOTES:

* Same specification as DSCA40.

(1) Includes nonlinearity, hysteresis and repeatability.

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

(2) V

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.

) 600Ω max *

OUT

), 30mA (I

OUT

)

±0.03% Span *

), ±20ppm/°C (I

OUT

(2)

/°C *

), 3µArms (I

OUT

), 55mA (I

OUT

or -35x15 rail

Ordering Information

Model Input Range Output Range

DSCA40-01 -10mV to +10mV 1

DSCA40-02 -50mV to +50mV 1

DSCA40-03 -100mV to +100mV 1

DSCA40-04 -10mV to +10mV 2, 3, 4

DSCA40-05 -50mV to +50mV 2, 3, 4

DSCA40-06 -100mV to +100mV 2, 3, 4

DSCA40-07 0 to +10mV 2, 3, 4

DSCA40-08 0 to 50mV 2, 3, 4

DSCA40-09 0 to +100mV 2, 3, 4

DSCA41-01 -1V to +1V 1

DSCA41-02 -5V to +5V 1

DSCA41-03 -10V to +10V 1

DSCA41-04 -1V to +1V 2, 3, 4

DSCA41-05 -5V to +5V 2, 3, 4

DSCA41-06 -10V to +10V 2, 3, 4

DSCA41-07 -20V to +20V 1

DSCA41-08 -20V to +20V 2, 3, 4

DSCA41-09 -40V to +40V 1

DSCA41-10 -40V to +40V 2, 3, 4

DSCA41-11 0 to +1V 2, 3, 4

DSCA41-12 0 to +5V 2, 3, 4

DSCA41-13 0 to +10V 2, 3, 4

DSCA41-14 0 to +20V 2, 3, 4

DSCA41-15 0 to +40V 2, 3, 4

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Output Ranges Available

Output Range Part No. Suffix Example

1. -10V to +10V NONE DSCA40-01

2. 0V to +10V NONE DSCA40-04

3. 4 to 20mA C DSCA40-04C

4. 0 to 20mA E DSCA40-04E

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DSCA

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