Impulse DSCA49 User Manual
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.
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.
Protection circuits are also present on the signal input and
High Performance Signal Conditioners
▲
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
DSCA
Figure 1: DSCA49 Block Diagram
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High Performance Signal Conditioners
DSCA
Specifications
Module
Output Range 0 to +10V or -10 to +10V
Over Range Capability 5%
Output Drive ±50mA max.
Output Resistance 0.5Ω
Output Current Limit 75mA
Output Protection
Continuous 240Vrms max
Transient ANSI/IEEE C37.90.1
Input Range 0V to +10V or -10V to +10V
Input Resistance
Normal 50MΩ
Power Off 65kΩ
Overload 65kΩ
Input Protection
Continuous ±35V max
Transient ANSI/IEEE C37.90.1
CMV, Output to Input, Output to Power
Continuous 1500Vrms max
Transient ANSI/IEEE C37.90.1
CMV, Input to Power
Continuous 50VDC max
CMR (50Hz or 60Hz) 110dB
Accuracy
Nonlinearity ±0.02% Span
Adjustability ±5% Zero and Span
Stability
Output Noise, 100kHz Bandwidth 2mVrms
Bandwidth, 3dB 1kHz
NMR 100dB/Decade Above 1kHz
Response Time, 90% Span 425µs
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)
Zero ±20ppm/°C
Span ±40ppm/°C
Voltage 19 to 29VDC
Current 80mA
Sensitivity ±0.0003%/%
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
DSCA49-04, -05, -06
±0.05% Span
Ordering Information
Model Input Range Output Range
DSCA49-04 0V to +10V -10V to +10V
DSCA49-05 -10V to +10V -10V to +10V
DSCA49-06 -10V to +10V 0V to +10V
DSCA
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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