Analog Voltage Input Signal Conditioners, Narrow Bandwidth DSCA30-01


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Analog Voltage Input Signal Conditioners, Narrow Bandwidth DSCA30-01 - 1

High Performance Signal Conditioners > Description Each DSCA30/31 voltage input module provides a single channel of analoginput which is filtered, isolated, amplified, and converted to a high-level voltageoutput. Signal filtering is accomplished with a five-pole filter which provides85dB 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 polesare on the system side. After the initial field-side filtering, the input signal ischopped by a proprietary chopper circuit. Isolation is provided by transformer coupling, again using a proprietary technique to suppress transmission ofcommon mode spikes or surges.Module output is either voltage or current. For current output models a dedicatedloop supply is provided at terminal 3 (+OUT) with loop return located at terminal4 (-OUT). The system-side load may be either floating or grounded.Special input circuits provide protection against accidental connection ofpower-line voltages up to 240VAC and against transient events as defined byANSI/IEEE C37.90.1. Protection circuits are also present on the signal outputand power input terminals to guard against transient events and power reversal. Signal and power lines are secured to the module using screw terminals whichare 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 accommodatesituations where fine-tuning is desired. The adjustments are made usingpotentiometers located under the front panel label and are non-interactive for ease of use. Features ?Accepts Millivolt and Voltage Level Signals?Industry Standard Output of either 0 to 10V/ѱ10V,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?ѱ0.01% Linearity?Easily Mounts on Standard DIN Rail?C-UL-US Listed ?CE and ATEX Compliant Figure 1: DSCA30/31 Block Diagram

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Analog Voltage Input Signal Conditioners, Narrow Bandwidth DSCA30-01 - 2

Typical at T A = +25C and +24V voltage supply NOTES:* Same specification as DSCA30.(1) Includes linearity, hysteresis and repeatability. (2) V ֢Ħ 500k > Ω minInput ProtectionContinuous240Vrms max* TransientANSI/IEEE C37.90.1*Output RangeSee Ordering InformationLoad Resistance (I > OUT )600 > Ω max*Current Limit8mA (V > OUT ), 30mA (I > OUT )*Output ProtectionShort to GroundContinuous* TransientANSI/IEEE C37.90.1* > CMV, Input to Output, Input to Power > Continuous1500Vrms max* TransientANSI/IEEE C37.90.1*CMV, Output to PowerContinuous50VDC max*CMR (50Hz or 60Hz)160dB*Accuracy ֖ > (1) ֱ0.03%...

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