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Signal Conditioning Solutions
New DIN Rail Frequency Input Modules Accept DC-To-100kHz Signals, Provide 1500Vrms Isolation
Dataforth Corporation, Tucson, Arizona announces the introduction
of its new family of DIN rail mounted DSCA45 frequency-to-voltage
/current modules.
These modules provide a simple, low cost method for interfacing
magnetic-pickups and tachometers from flow meters, engine test stands,
rotating equipment, and other pulse or "zero-crossing" signals to
data acquisition and control systems for the plant, process, or
laboratory.
Each DSCA45 frequency input module provides a single channel
of pulse or frequency input, which is isolated and converted to a
standard analog voltage or current output. The modules will accept
TTL-level or zero-crossing signals in various ranges from 0-500Hz
to 0-100kHz and convert them to proportional 0 to +10V, 0 to 20mA,
or 4 to 20mA output signals. Input levels may range from 60mVp-p to
350Vp-p, and input hysteresis is provided for each signal type.
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An excitation source of 5.1Vdc at 8mA maximum is available
for use with magnetic pick-up or contact-closure type sensors. Current
output models have a built-in dedicated isolated loop supply, which
provides an active output signal. Outputs are isolated to 1500Vrms
continuous from "field" side transients and surges, which might otherwise
degrade signal integrity and damage expensive "computer" side equipment.
The isolation barrier also eliminates troublesome ground loops.
Special input circuits provide protection against accidental connection
of power-line voltages up to 240Vac and against transient events as
defined by ANSI/IEEE C37.90.1-1989.
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 with pluggable
terminal blocks, which allow ease of system assembly and reconfiguration.
Specified accuracy for the DSCA45 is ±0.05% of span, including nonlinearity,
hysteresis, and repeatability. Both zero and span may be adjusted
±5% from two easily accessible potentiometers on the front of the
module. The adjustments are non-interactive for ease of use.
Special built-in filters reduce common mode 50Hz and 60Hz noise
by 120dB. The modules will accept wide range power from 19Vdc to 29Vdc
with current requirements between 60mA and 80mA, depending if the
module is a voltage or current output type. An LED indicator on the
front panel is lit when power is connected. Rated operating temperature
range is -40°C to +80°C, and the relative humidity range is zero
to 95% noncondensing. All modules meet the requirements of EN50081-1
(radiated/conducted emissions) and EN50082-1 (ESD/RF/EFT immunity).
Case dimensions are 2.95 x 0.89 x 4.13 inches (75mm x 22.5mm x 105mm).
The modules may be mounted on standard DIN EN50022-35x7.5 or -35x15
rails.
Go
directly to our DSCA45 family in our
Signal Conditioning Products Catalog.
Data acquisition. Signal conditioning. Signal conditioners. Thermocouple.
Strain gage. Data loggers. Data logging. PC-based data acquisition.
5B signal conditioning. Dataforth provides all data acquisition and
signal conditioning solutions.
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