Current Sensors PI and PI-600 Open Loop Hall Effect Description The PI and PI-600 Hall effect current sensors accurately measure DC and AC currents and provide electrical isolation between the output of the sensor and the current carrying conductor. Applications Features • High accuracy • Industrial • Appliances • Automotive • Wide frequency range • Ideal Replacement for Shunt or CT • Excellent linearity • Battery Monitoring • Safety isolation • Load Monitoring at the point of Distribution • P.C. board mount process control on PCB, the back plane or fuse • U.P.S. (Uninterruptable Power Supply) Measuring Circuit Units PI PI-600 Full Scale (FS) DC or AC peak..................................... + A 350 600 Full Scale output (1) ................................................ + m V 175 to 385 150 to 330 AC Bandwidth (+3 dB of reading) (2) ....................... kHz DC to 1 Response time ........................................................ <50 ms Excitation Circuit Maximum excitation current (Ic) ............................... mA 40 Input resistance ...................................................... ohms 30 to 120 Output Sensitivity ............................................................... mV/A 0.5 to 1.1 0.25 to 0.55 Linearity ................................................................. 0-100 A +1.5 A 100-350 A +5.25 A 0-600 A +12 A Typical zero current offset ........................................ + mV 3 Maximum zero current offset. ................................... + m V 16 Maximum hysteresis of offset (3) ............................. + mV 2 1.4 Minimum load resistance ........................................ k ohms >1 0 Output resistance .................................................... ohms 70 to 300 Influences On Accuracy o Typical offset drift with temperature .......................... + V/ C 20 m o Maximum offset drift with temperature ..................... + m V/ C 50 Excitation change of +1% - Max. sensitivity change ....... + % 1 o Typical sensitivity drift with temperature .................... % / C -0.05 o % /C -0.07 Maximum sensitivity drift with temperature ................ Withstand Capabilities Dielectric test (4) .....................................................kV 6 Output short or open .............................................. No Damage General Information o Operating temperature range ..................................... C -40 to +100 o Storage temperature range ....................................... C -40 to +110 Package ................................................................. Potted, flame retardant plastic case Aperture opening..................................................... inches (mm) 0.8 (20.3) Weight ................................................................... grams 7 1 Mounting ................................................................ Hold down tabs secure sensor to PCB Output reference ..................................................... To obtain a differentially positive output on pin marked +V , positive conventional current must flow as per the H direction of arrow marked on sensor. 6120 Hanging Moss Road • Orlando, Florida 32807 Phone (407) 678-9748 • Fax (407) 677-5765 • www.fwbell.com Current Sensors Mechanical Dimensions All dimensions are in inches (millimeters) Models PI and PI-600 1.400 .800 I.D. (MIN.) (35.6) (20.3) 1.811 O.D. (MAX.) (46.0) 1.938 2.124 (49.2) (53.9) .319 ( 8.1 ) .975 + _ .025 ( 24.8 + _ .63 ) Pin Identification .343 I 1 – C Negative Control Current (8.7) +l V 2 + H Positive Output Voltage .030 V 3 – H Negative Output Voltage ( .76 ) I 4 + C Positive Control Current .670 MAX. (17) 1234 .170 Approx. (4.3 ) 4 Pins. .025 x .010 Solderable Post (2) ( .63 x .25 ) .125 x .012 (3.2 x .30 ) .100 ( 2.5 ) on centers. for Mounting to PWB Hall Sensor Connections Typical Amplifier Circuit for Current Measurements Calibration Input 1N914 78L05 78L05 +15v 500 100 10 GND Output 7 to 40mA R* .1uF 1.0 K – 4 7 2 3 ZERO 6 2 OP–07 1 10K 1.0 K Output = 1V/100A 4 + 3 R* .1uF R* = 22.1k for a PI R* = 44.2k for a PI – 600 All resistances in ohms. –15v 10 Notes 1. All specifications are given with a control current (Ic) of 40 mA. 2. Consult F.W. Bell if the product of the aper ture current and frequency exceeds 400 ampere-kilohertz. 3. Hysteresis specifications given for Full Scale aperture current remnant. 4. The dielectric test consist of 6 kVac at 60 Hz for one minute between a bare 0.750 inch diameter conductor. (loca ted concentricall y through the aper ture) and the output of the sensor. 5. Due to continuous process improvement, all specifications are subject to change without notice. 6120 Hanging Moss Road • Orlando, Florida 32807 Phone (407) 678-9748 • Fax (407) 677-5765 • www.fwbell.com Rev. date 04/2003