Curren t Sensors Model CLS-25 Closed Loop Hall Effect Description The CLS-25 is a reduced size current transducer based on the principle of magnetic compensation. It provides electronic measurement of DC, AC or pulsed currents, and their combinations, with galvanic isolation between the primary (high current) and secondary circuits. It has four integral primary pins. This closed loop current sensor provides excellent performance at affordable prices. Applications Features • Variable speed drives for motors • Noncontact measurement of high current • Welding Equipment • Measures DC, AC and impulse currents • Power supply Equipment • Current sensing up to 400A peak • Measure and control system • Very fast response and high accuracy • Over current protection • High overload capacity • Protection of power semiconductors • PC board mount Electrical Specifications CLS-25 Nominal Current (I ) ................................................................................ 25 A.t RMS N [2] [1] Measuring Range .................................................................................. 0 to ± 50 A.t (± 62 A.t) Measuring Resistance .............................................................................. R min. R max. with ±15V at ±25 A.t Max. ...................................... 54 ohm 360 ohm at ±50 A.t Max. ...................................... 54 ohm 150 ohm at ±90 A.t Max. ...................................... 54 ohm 54 ohm Nominal Analog Output Current ................................................................ 25 mA Turns Ratio.............................................................................................. 1-2-3-4/1000 o [3][4] Accuracy at +25 C ............................................................................ 0.5% of I N Max. Supply Voltage ....................................................................................... ±15 Vdc (+5%) Galvanic Isolation .................................................................................... 5 kV RMS/50 Hz/1 minute o Zero Offset Current at + 25 C ............................................................... better than ±0.15mA o o Thermal Drift of offset Current O C to 70 C ............................................... better than ±0.6mA Linearity ................................................................................................. better than ±0.2% Response Time ....................................................................................... less than 1 ms Bandwidth............................................................................................... DC to 200 kHz (-1dB) General Information o o o o Operating/Storage Temperature ............................................................... -40 C to + 85 C/-40 C to + 90 C Current Consumption ............................................................................... 10 mA plus output current o Secondary Internal Resistance (at + 70 C) ............................................... 66 ohm Primary Internal Resistance ..................................................................... <1.25 milliohm per turn Weight ................................................................................................... 17 g maximum Package ................................................................................................. Insulated plastic case (UL94-VO) Mounting ................................................................................................ Designed to mount directly on PCB via hole connection pins. Output Reference .................................................................................... To obtain a positive output on the terminal marked “O”, current must flow from terminals 1,2,3,4 to terminals 8,7,6, and 5 (conventional flow). Notes: [1] = The CLS-25 offers a choice of 4 measuring ranges (refer to the mechanical dimensions on the following page) [2] = For 2 seconds only [3] = Excludes the effect of zero offset [4] = Over the operating range ±50 A.t. 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 Current Sensors Mechanical Dimensions All dimensions are in inches (millimeters) Model CLS-25 DIRECTION OF CURRENT + I 1.25 (31.75 ) 0.50 (12.70 ) CLS-25 0.80 (20.30 ) -+ o 0.039 (1.0 ) 0.020 (0.5 ) 3 PLCS (SECONDARY PIN) 0.049 (1.25 ) DIRECTION (PRIMARY PIN) OF CURRENT PIN 1 I + PIN 1 0.272 (6.90 ) 0.100 (2.54) 0.1 14 (2.9 ) 0.063 (1.60) -+ o 0.374 (9.5) 0.305 (7.75) 0.100 (2.54) Connection Schematic Primary Primary CLS-25 Primary Nominal Output BIPOLAR Current Current Pin Connections Turns Current (mA) NOM. I MAX. I N N DC SUPPLY 8765 OUT 1 25 44 25 Pins IN 1234 - 1 to 4 I IN -15 V 8765 OUT 2 12 22 24 Pins IN 1234 +15 V + 5 to 8 I OUT 8765 OUT R SENSE 3 8 14 24 IN 1234 0 GND 8765 OUT 4 6 11 24 IN 1234 Vout Notes: 1. Mounting Holes - Primary Pins 0.057 (1.45) 2. Mounting Holes - Secondary Pins 0.047 (1.20) 3. 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