High Performance Signal Conditioners DSCA DSCA45 Frequency Input Signal Conditioners Description 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 powerline voltages up to 480VAC 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 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 accom- 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). Features Accepts Frequency Inputs of 0 to 100kHz Industry Standard Output of Either 0-10V, 0-20mA, or 4-20mA 0.05% Factory Calibrated Accuracy Adjustable Zero (5%) and Span (5%) 1500Vrms Transformer Isolation Input Overload Protected to 240VAC Continuous ANSI/IEEE C37.90.1-1989 Transient Protection Mounts on Standard DIN Rail CSA and FM Approvals Pending CE Compliant modate 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: DSCA45 Block Diagram 150 For information call 800-444-7644 High Performance Signal Conditioners Specifications Typical at TA=+25C and +24V supply voltage Module Input Range Threshold Minimum Input Maximum Input Minimum Pulse Width TTL Input Low TTL Input High Hysteresis Zero Crossing TTL Resistance Protection Continuous Transient Output Range Adjustability Load Resistance (IOUT) Current Limit See Ordering Information 5% Zero & Span 600 max. 8mA (VOUT), 30mA (IOUT) Accuracy (1) vs. Temperature Nonlinearity 0.05% Span 40ppm/C (Zero & Span) 0.02% Span Field Excitation Power Supply Voltage Current Sensitivity Protection Reverse Polarity Transient Environmental Operating & Storage Temp. Range Relative Humidity Emissions Immunity Mechanical Dimensions (h)(w)(d) Mounting DSCA45-01 DSCA45-02 DSCA45-03 DSCA45-04 DSCA45-05 DSCA45-06 DSCA45-07 DSCA45-08 40mV 1.5V 100k Continuous ANSI/IEEE C37.90.1-1989 <0.20% Span at input >2% Span Response Time (0 to 90%) DSCA45-01, -02, -03 DSCA45-04, -05, -06 DSCA45-07, -08 Model 0 to 100kHz max Zero Crossing 60mVp-p 350Vp-p 4s 0.8V max 2.4V min Output Protection Short to Ground Transient Ripple Isolation (Common Mode) Input to Output, Input to Power Continuous Transient Output to Power Continuous Rejection (50-60Hz Common Mode) Ordering Information DSCA45 240Vrms max ANSI/IEEE C37.90.1-1989 DSCA Input Range Available Output Range 0-500Hz 0-1kHz 0-2.5kHz 0-5kHz 0-10kHz 0-25kHz 0-50kHz 0-100kHz 2, 3, 4 2, 3, 4 2, 3, 4 2, 3, 4 2, 3, 4 2, 3, 4 2, 3, 4 2, 3, 4 Output Ranges Available Output Range 1. 2. 3. 4. -10V to +10V 0V to +10V 4 to 20mA 0 to 20mA Part No. Suffix NONE NONE C E Example N/A DSCA45-01 DSCA45-01C DSCA45-01E 1500Vrms max ANSI/IEEE C37.90.1-1989 50VDC max 120dB 310ms, 175ms, 50ms 30ms, 30ms, 10ms 5ms, 1.5ms +5.1V 5% at 8mA max 19 to 29VDC 60mA (VOUT), 80mA (IOUT) 0.0002%/% Continuous ANSI/IEEE C37.90.1-1989 -40C to +80C 0 to 95% noncondensing EN50081-1, ISM Group 1, Class A (Radiated, Conducted) EN50082-1, ISM Group 1, Class A (ESD, RF, EFT) 2.95" x 0.89" x 4.13" (75mm x 22.5mm x 105mm) DIN EN50022-35x7.5 or -35x15 rail NOTES: (1) Includes nonlinearity, hysteresis and repeatability. Visit our website www.dataforth.com 151