Magnetoresistive Current Sensor CMR-25 - Sypris T&M - FW Bell - #1

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Model CMR-25 Magnéto-Résistive Description The CMR-25 current sensor builds on patentée! company technology to offer superior sensor performance and accuracy in current measuring applications. The current sensor utilizes an ASIC (Application Spécifie Integrated Circuit) and a magnetoresistive (MR) magnetic sensor to provide extremely low offset drift with température, resulting in stable, repeatable, accurate measurements. It opérâtes from a +5V unipolar power and has an accessible internai 2.5V voltage référence. It can configure from either the internai or external voltage référence, enabling several sensors to be used without offset imbalance. Three primary pin enable the sensor to be confïgured for différent measuring ranges and the current output signal allows différent load resistors to be used depending on the application. Features • Ultra low offset drift with température • Unipolar Voltage Supply • Superior global accuracy over température range • Customer adjustable gain • Customer accessible voltage référence • Self calibrating • Designed for auto assembly • Current output Applications • Servo drives • Variable speed drives • Frequency converters • Power supply Systems • Over current protection • Power metering • Uninterruptible power supplies (UPS) Electrical Spécifications Nominal current (In)....................................... Measuring range........................................... Measuring résistance (2) ............................. with+ 5Vat ± 25 Amp rms...... at ± 40 Amp rms...... Nominal analog output current................. Turns ratio.................................................... Overall accuracy at 25 °C (3)...................... Overall accuracy at - 40 °C to +85 °C (3) Supply voltage (Vdc)...................................... Internai référence voltage........................... Galvanic Isolation.......................................... CMR-25 - 25 Amp rms -Oto ±56 Amp 01 - R. min. 0 ohms 0 ohms R. max. 80 ohms 31 ohms 12.5 mA rms 1-2-3:2000 - ± 0.24 % of I n max. — - ± 0.32 % of I n max. — - +5Vdc(±5%) - - +2.5 Vdc ( ± 10 mV) 5.0 kV rms/ 50 Hz/I minute) Accuracy-Dynamic Performance Zéro current offset at 25 C............................. Offset current température drift between +10°Cand +50 °C.............. between -40 °C and+85 °C................ Linearity........................................................ Response time @ 90% ................................... di/dt accurately followed................................ Bandwidth (-1 dB)........................................... General Information Operating température................................... Storage température...................................... Current drain (plus output current)................... Secondary internai résistance ......................... Package ....................................................... Approvals..................................................... Rated insulation voltage /insulation classification Environment.................................................. Weight.......................................................... Mounting...................................................... Output référence........................................... :30 uA (= 0.24%of25A) < ± 5 uA (= 0.04 °/ < ± 10 uA (= 0.08 « - < ± 0.1 % of25A) D0f25A) - better than 200 ns -greaterthan 100 A/us — DC to 200 kHz — --40°Cto + 85 °C- --40°Cto + 90 °C- - 12 mA (+5V) - - 50 ohms (at 70 °C) - Glass -filled Polyamide (UL94-VO) EN 50082-2, EN 50081-2, UL, CE - 400V/Reinforced - - Polution degree 2, category III - - 20grams - Designed to mount directly on PCB via thru hole connect pins - To obtaina positive outputon the terminal marked "0/P",current must flow in the direction of the arrow (conventionalflow) Notes: 1. ac peak. Maximum de or ac rms range is 40 amps. 2. Higher résistance (Rm) values can be used with reduced measuring range. Specified values conditional on 70 °C ambient and no power supply tolérance. 3. Excludes the effects of tolérances of référence voltage and external load résistance. 4. Due to continuous process improvements, spécifications are subject to change without notice 1 paciFic SCIEnTÏFIC FW BELL Rev.date 05/2009