Impulse DSCA43 User Manual

High Performance Signal Conditioners

DSCA43

General Purpose Input Signal Conditioners, with DC Excitation

Description

Each DSCA43 general purpose input module provides a single channel of

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

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

optimized for step response. 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.

Transducer excitation is provided from the module by a stable 10V source. This

source is fully isolated, allowing the amplifier inputs to operate over the full range

of the excitation voltage. This feature enables the module to be interfaced to a wide

variety of sensors requiring exctitation.

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 signal input and excitation 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

 Interfaces to Transducers and Other Devices

Requiring a Stable, Isolated DC Supply

 Industry Standard Output of Either 0-10V,

±10V, 0-20mA, or 4-20mA

 1500Vrms Transformer Isolation

 ANSI/IEEE C37.90.1 Transient Protection

 Input Protected to 240VAC Continuous

 True 3-Way Isolation

 Wide Range of Supply Voltage

 100dB CMR

 Fully Isolated Excitation Supply

 ±0.03% Accuracy

 ±0.01% Linearity

 Easily Mounts on Standard DIN Rail

 C-UL-US Listed

 CE and ATEX Compliant

DSCA

Figure 1: DSCA43 Block Diagram

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For information call 800-444-7644

High Performance Signal Conditioners

DSCA

Specifications

Module

Input Range ±1V to ±10V

Input Bias Current ±0.05nA

Input Resistance

Normal >500kΩ Power Off >500kΩ Overload >500kΩ

Signal Input Protection

Continuous 240Vrms max

Transient ANSI/IEEE C37.90.1

Excitation

Output Voltage (-EXC to +EXC) 10V ± 0.03%

Output Current 40mA maximum

Load Regulation ±5ppm/mA

Stability ±15ppm/°C

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

Accuracy

Nonlinearity ±0.01% Span

Adjustability ±5% Zero and Span

Stability

Output Noise, 100kHz Bandwidth 750µVrms

Bandwidth, 3dB 3kHz

NMR 100dB/Decade Above 3kHz

Response Time, 90% Span 170µs

Power Supply

Environmental

Emissions EN61000-6-4 ISM, Group 1

Immunity EN61000-6-2 ISM, Group 1

Mechanical Dimensions 2.95" x 0.89" x 4.13"

Mounting DIN EN 50022 -35x7.5

NOTES:

(1) Includes nonlinearity, hysteresis and repeatability.

(1)

Input Offset ±5µV/°C

Output Offset ±6ppm/°C (V

Gain ±55ppm/°C

Voltage 19 to 29VDC

Current 60mA (V

Sensitivity +0.0002%/%

Protection

Reverse Polarity Continuous

Transient ANSI/IEEE C37.90.1

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

Radiated, Conducted Class A

R F Performance A ±0.05% Span Error

ESD, EFT, Surge, Voltage Dips Performance B

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

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

DSCA43

) 600Ω max

OUT

±0.03% Span

OUT

or -35x15 rail

), 30mA (I

), ±20ppm/°C (I

), 80mA (I

OUT

Ordering Information

Model Input Range Output Range

DSCA43-01 -1V to +1V 1

DSCA43-02 -2V to +2V 1

DSCA43-03 -3V to +3V 1

DSCA43-04 -4V to +4V 1

DSCA43-05 -5V to +5V 1

DSCA43-06 -6V to +6V 1

DSCA43-07 -7V to +7V 1

DSCA43-08 -8V to +8V 1

DSCA43-09 -9V to +9V 1

DSCA43-10 -10V to +10V 1

DSCA43-11 -1V to +1V 2, 3, 4

DSCA43-12 -2V to +2V 2, 3, 4

DSCA43-13 -3V to +3V 2, 3, 4

DSCA43-14 -4V to +4V 2, 3, 4

DSCA43-15 -5V to +5V 2, 3, 4

DSCA43-16 -6V to +6V 2, 3, 4

)

DSCA43-17 -7V to +7V 2, 3, 4

DSCA43-18 -8V to +8V 2, 3, 4

DSCA43-19 -9V to +9V 2, 3, 4

DSCA43-20 -10V to +10V 2, 3, 4

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Output Ranges Available

Output Range Part No. Suffix Example

1.-10V to +10V NONE DSCA43-01

2. 0V to +10V NONE DSCA43-04

3. 4 to 20mA C DSCA43-04C

4. 0 to 20mA E DSCA43-04E

)

OUT

)

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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DSCA

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