Impulse DSCA49 - Manual

High Performance Signal Conditioners DSCA
For information call 800-444-7644 156
DSCA49
Voltage Output Signal Conditioners
Description
Each DSCA49 voltage output module provides a single channel of analog
output. The input signal is buffered, isolated, filtered and converted to a voltage
output. Signal filtering is accomplished with a five-pole filter which provides
100dB per decade of attenuation above 1kHz. An anti-aliasing pole is located
on the system side of the isolation barrier, and the other four poles are on the
field side. After the initial system-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.
Special output 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 input 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.
Figure 1: DSCA49 Block Diagram
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Features
• Accepts High Level Voltage Input
• Provides High Level Voltage Outputs to
±10V at 50mA
• ANSI/IEEE C37.90.1
• 1500Vrms Transformer Isolation
• ±0.05% Accuracy
• ±0.02% Linearity
• Output Protected to 240VAC Continuous
• True 3-Way Isolation
• Wide Range of Supply Voltage
• 100dB CMR
• Easily Mounts on Standard DIN Rail
• C-UL-US Listed
• CE and ATEX Compliant