dsca45-08 Dataforth Corporation, dsca45-08 Datasheet
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dsca45-08
Manufacturer Part Number
dsca45-08
Description
Frequency Input Signal Conditioners
Manufacturer
Dataforth Corporation
Datasheet
1.DSCA45-08.pdf
(2 pages)
DSCA45
Frequency Input Signal Conditioners
Description
Each DSCA45 frequency input module provides a single channel of frequency
input which is isolated and converted to a standard analog voltage or current
output (Figure 1).
The frequency input signal can be a TTL level or zero-crossing signal. Terminal
7 (-IN) on the field-side terminal block is the “common” or ground connection for
input signals. A TTL signal is connected from terminal 6 (+IN) to terminal 7 (-IN),
while a zero-crossing signal is connected from terminal 5 (+EXC) to terminal 7
(-IN). Input circuitry for each of the signal types has hysteresis built in. An input
signal must cross entirely through the hysteresis region in order to trigger the
threshold comparator.
A +5.1V excitation is available for use with magnetic pick-up or contact-closure
type sensors. The excitation is available on terminal 8 (-EXC) with return at
terminal 7 (-IN).
Module output is either voltage or current. For current output models a dedicated
loop supply is provided at terminal 3 (+OUT) with loop return located at terminal
4 (-OUT). The system-side load may be either floating or grounded.
Special input circuits provide protection against accidental connection of power-
line voltages up to 480VAC and against transient events as defined by ANSI/
IEEE C37.90.1. 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 using screw terminals which
are pluggable terminal blocks for ease of system assembly and reconfiguration.
DSCA45 modules have excellent stability over time and do not require
recalibration, however, both zero and span settings are adjustable to accommo-
©1995-2009 Dataforth Corporation, All Rights Reserved ISO9001:2000-Registered QMS
Figure 1: DSCA45 Block Diagram
210
For information call 800-444-7644
date 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
• Accepts Frequency Inputs of 0 to 100kHz
• Industry Standard Output of Either 0-10V,
• ±0.05% Factory Calibrated Accuracy
• Adjustable Zero (±5%) and Span (±5%)
• 1500Vrms Transformer Isolation
• Input Overload Protected to 240VAC
• ANSI/IEEE C37.90.1 Transient Protection
• Mounts on Standard DIN Rail
• C-UL-US Listed
• CE and ATEX Compliant
0-20mA, or 4-20mA
Continuous
Features
DSCA
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dsca45-08 Summary of contents
Page 1
... Signal and power lines are secured to the module using screw terminals which are pluggable terminal blocks for ease of system assembly and reconfiguration. DSCA45 modules have excellent stability over time and do not require recalibration, however, both zero and span settings are adjustable to accommo- ...
Page 2
... DSCA45- 100kHz max DSCA45-02 Zero Crossing DSCA45-03 60mVp-p DSCA45-04 350Vp-p 4µs DSCA45-05 0.8V max DSCA45-06 2.4V min DSCA45-07 DSCA45-08 40mV 1.5V 100kΩ † Output Ranges Available 240Vrms max ANSI/IEEE C37.90.1 Output Range See Ordering Information ±5% Zero & Span 1. 10V to +10V – ...