dsca43-20 Dataforth Corporation, dsca43-20 Datasheet

dsca43-20

Manufacturer Part Number

dsca43-20

Description

General Purpose Input Signal Conditioners, With Dc Excitation

Manufacturer

Dataforth Corporation

Datasheet

1.DSCA43-20.pdf (2 pages)

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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

DSCA43

General Purpose Input Signal Conditioners, with DC Excitation

Figure 1: DSCA43 Block Diagram

208

For information call 800-444-7644

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.

High Performance Signal Conditioners

• Interfaces to Transducers and Other Devices

• 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

• Fully Isolated Excitation Supply

• ±0.03% Accuracy

• ±0.01% Linearity

• Easily Mounts on Standard DIN Rail

• C-UL-US Listed

• CE and ATEX Compliant

Requiring a Stable, Isolated DC Supply

±10V, 0-20mA, or 4-20mA

Features

DSCA

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dsca43-20 Summary of contents

Page 1

... 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 ...

Page 2

... DSCA43-15 See Ordering Information DSCA43-16 600Ω max DSCA43-17 8mA (V ), 30mA (I ) OUT OUT DSCA43-18 DSCA43-19 Continuous ANSI/IEEE C37.90.1 DSCA43-20 1500Vrms max ANSI/IEEE C37.90.1 † Output Ranges Available 50VDC max Output Range 100dB ±0.03% Span 1. 10V to +10V – ±0.01% Span +10V ± ...

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