Impulse DSCA39 User Manual
DSCA39
Current Output Signal Conditioners
Description
Each DSCA39 current output module provides a single channel of analog
output. The input signal is buffered, isolated, filtered and converted to a unipolar
or bipolar current 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.
High Performance Signal Conditioners
▲
Features
Accepts High Level Voltage Input
Provides 4 to 20mA, 0 to 20mA, or -20
to +20mA Output
ANSI/IEEE C37.90.1 Transient Protection
1500Vrms Transformer Isolation
±0.03% Accuracy
±0.01% 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: DSCA39 Block Diagram
144
For information call 800-444-7644
High Performance Signal Conditioners
DSCA
Specifications
Typical at TA=+25°C and +24V supply voltage
Model DSCA39-01, -02, -03, -04 DSCA39-05 DSCA39-07
Output Range 4 to 20mA or 0 to 20mA 0 to 20mA -20mA to +20mA
Over Range Capability 10% * 5%
Output Compliance Voltage
(Open Circuit) 22VDC * ±15VDC
Load Resistance Range 0 to 750Ω * 0 to 500Ω
Output Protection
Continuous 240Vrms max * *
Transient ANSI/IEEE C37.90.1 * *
Input Range ±10V or 0V to +10V 0 to 20mA ±10V
Input Resistance
Normal 2MΩ <100Ω *
Power Off 2MΩ <100Ω *
Overload 2MΩ 65kΩ *
Input Protection
Continuous ±35V max 75mA *
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 ±0.01% Span * *
Adjustability ±5% Zero and Span * *
Stability
Output Noise, 100kHz Bandwidth 4µArms * *
Bandwidth, 3dB 1kHz * *
NMR 100dB/Decade Above 1kHz * *
Response Time, 90% Span 475µs * *
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:
* Same specification as DSCA39-01, -02, -03, -04
(1) Includes nonlinearity, hysteresis and repeatability.
(1)
Zero ±20ppm/°C * *
Span ±40ppm/°C ±50ppm/°C *
Voltage 15 to 30VDC * 19 to 29VDC
Current 65mA * *
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)
±0.03% Span * ±0.05%
or -35x15 rail
Ordering Information
Model Input Range Output Range
DSCA39-01 0V to +10V 4mA to 20mA
DSCA39-02 -10V to +10V 4mA to 20mA
DSCA39-03 0V to +10V 0mA to 20mA
DSCA39-04 -10V to +10V 0mA to 20mA
DSCA39-05 4mA to 20mA 4mA to 20mA
DSCA39-07 -10V to +10V -20mA to +20mA
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.
Visit our website www.dataforth.com
145
Loading...