topstek current transducers TW25A .. tw300a - 98 - www.topstek.com tw v080201 7/1/2008 tw 25a~300a features highly reliable hall effect device compact and light weight. two sensors in one package fast response time excellent linearity of the output voltage over a wide input range excellent frequency response (> 50 khz) low power consumption (22 ma nominal) capable of measuring both dc and ac, both pulsed and mixed high isolation voltage between the measuring circuit and the current-carrying conductor (ac2.5kv) extended operating temperature range flame-retardant plastic case and silicone encapsulate, using ul classified materials, ensures protection against environmental contaminants and vibration over a wide temperature and humidity range applications ups systems industrial robots nc tooling machines elevator controllers process control devices ac and dc servo systems motor speed controller electrical vehicle controllers inverter-controlled welding machines general and special purpose inverters power supply for laser processing machines controller for traction equipment e.g. electric trains other automatic control systems specifications parameter symbol unit tw 25a tw 37.5a tw 50a tw 75a tw 100a tw 125a tw 150a tw 175a tw 200a tw 250a tw 300a nominal input current i fn a dc 25 37.5 50 75 10 0 125 150 175 200 250 300 linear range i fs a dc 75 112.5 150 225 300 375 450 525 600 750 750 nominal output voltage v hn v 4 v1% @ if=i fn ( r l =10k) offset voltage v os mv within 35 mv @ i f =0, t a =25c output resistance r out <100(50nominal) hysteresis error v oh mv within 30 mv @ i f =i fn 0 supply voltage v cc /v ee v 15v 5% linearity % within 1% of i fn consumption current i cc ma 22 ma nominal, 30 ma max response time (90%v hn ) t r sec 5 sec max. @ d i f / dt = i fn / sec frequency bandwidth (-3db) f bw hz dc to 50khz thermal drift of output - %/c within 0.1 %/c @ i fn thermal drift of zero current offset - mv/c < 3 mv/c < 1.5 mv/c < 1 mv/c dielectric strength - v ac2.5kv x 60 sec isolation resistance @ 1000 vdc r is m >1000 m operating temperature t a c -15c to 80c storage temperature t s c -20c to 85c mass w g 150 g
topstek current transducers TW25A .. tw300a - 99 - www.topstek.com tw v080201 7/1/2008 3 pin assignment 0v -15v +15v b output a output 5 gain b offset b offset a gain a positive current flow direction appearance, dimensions and pin identification all dimensions in mm 0.1, holes C0, +0.2 except otherwise noted.
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