Autopad Linear Position Sensor Datasheet Sensing and Control Make Possible Autopad Linear Position Sensor Features: Absolute non-contact inductive position technology Passive target Senses through non-conductive materials and fluids (e. g. plastic, glass, oil, water) Custom ASIC provides 12bit resolution Analogue 0-5V or 4-20mA output Fast response time Linear travel: 75mm, 150mm, 250mm OEM versions available customised to the requirements of your application Our advantage: No contact between target and sensor so parts cannot wear out Simple and robust construction with proven reliability >40million Autopad sensors in the field Excellent immunity to ex ternal electromagnetic fields Completely immune to magnetic fields Immune to dirt and dust Good tolerance to geometric offsets Cost competitive performance Application General sensing applications, especially where: Reliability and ease of use are important Large magnetic fields and/or harsh EMC requirements (e. g. near motors) High vibration environments (e. g. pumps, heav y machiner y) Copyright TT Electronics, 2012. All rights reserved. Subject to change without prior notification. Issue: 2014.1 www.ttelectronics.com Wet and/or dirty environments For example, industrial automation, process control, valve positioning , materials handling , injection moulding , cutting & slitting , welding , CNC machines, hydraulic cylinders, robotics Output Output (nominal values for all sensor ranges) 5V/20mA 4.75V/19.2mA Sensor Out of Range Out of Range out of range Gradient (upper) Range (lower) (upper) 18mV/mm 0.2V 4.8V 250mm 59uA/mm 4.6mA 19.4mA 30mV/mm 0.25V 4.75V 0.25V/4.8mA 150mm out of range 96uA/mm 4.8mA 19.2mA (lower) 0V/0mA Sensing Range 56mV/mm 0.4V 4.6V (150mm example) 75mm 179uA/mm 5.3mA 18.7mA General Note T T Electronics reser ves the right to make changes in product specification without notice or liability. All information is subject to T T Electronics own data and is considered accurate at time of going to print. w w w.abctt onnectors.com w w w.electrtt onics.com TT Electronics plc 11.14 Gradient 30mV/mm or 96uA/mmSensing and Control Make Possible Autopad Linear Position Sensor Autopad Linear Position Sensor Technology Puck Pad Originally developed for demanding automotive applications, Autopad is an inductive technology which is now available for use in industrial applications. The key components are a sensor element (or Pad), a target (or Puck) and electronics, based around a proprietar y ASIC. The Pad includes two PCB track structures which each form transmitter coils. These generate sine and cosine shaped spatial electromagnetic fields. The moving target is formed by a simple LC resonant circuit - the Puck. The transmitter coils are driven with a high frequency carrier (at the Puck resonant frequency), but modulated at a lower frequency in quadrature. These fields couple to the Puck and the cumulative current generated in the Puck depends on its position. The alternating field produced by the Puck induces a voltage in a third coil on the Pad the receiver coil. The ASIC synchronously detects this voltage signal, leaving only the modulated signal. The phase of this modulated signal is then calculated and gives a direct measurement of the Puck position. The technology can be configured for specific applications for example, to suit a specific geometr y, or with a high resolution and accuracy coarse/fine output, or with redundant output for increased reliability. Specification Interface Analogue: 0-5V ratiometric Analogue: 0-5V 4-20mA Power supply 4.5 5.5V DC 8-24V DC 8-24V DC Current consumption 20 mA 15 mA Max. 40 mA Nominal Sensing Range (L) 75mm / 150mm / 250mm Nominal targetsensor separation 2mm +/- 1.5mm Sense through nonconductive material (eg: plastic, water, oil) Yes Linearity 1% full scale output Hysteresis None Magnetic field resistance Complete Immunity Resolution 12 bit Update rate 250s Operating Temperature -20 to 70C Electrical connections Brown: V+, Black: Output, Blue: Gnd Output load >1k Reverse polarity Yes Overvoltage protection Yes, to 40 V Cable length 0.5m Sealing IP67 Approvals CE, ROHS & WEEE General Note T T Electronics reser ves the right to make changes in product specification without notice or liability. All information is subject to T T Electronics own data and is considered accurate at time of going to print. w w w.abctt onnectors.com w w w.electrtt onics.com TT Electronics plc 11.14