Catalog excerpts
Inductive Displacement Transducers with CAnopen interface IWN 250 series Measuring strokes : 20 mm, 40 mm, 100 mm, 200 mm CANopen Features ■ NMT Master: ■ NMT-Slave: ■ Maximum Boot up: ■ Minimum Boot up: ■ COB ID Distribution: ■ Node ID Distribution: ■ No of PDOs: ■ PDO-Modes: ■ Variables PDO-Mapping: ■ Emergency Message: ■ Heartbeat: ■ No. of SDOs: ■ Device Profile: no yes no yes Default, SDO via Index 2000 oder LSS 2 Tx sync, async, cyclic, acyclic no yes yes 1 Rx / 1 Tx CiA DSP 406 Version 3.0 ■ Contactless, robust sensor system ■ Integral electronics ■ Resolution 12 bit / binary ■ Definite repeatability ■ To CANopen Application Layer and Communication Profile, CiA Draft Standard 301, Version 4.1 and to Device Profile for Encoders CiA Draft Standard Proposal 406 Version 3.0 ■ CANopen Layer Setting Services (LSS) for address and Baud rate ■ Protection class IP 66 ■ Gauge type with spring return up to 100 mm measuring stroke Construction and operating principle The displacement transducer operates according to the principle of the differential choke, i.e. an inductive half bridge. It consists of two coils which are encapsulated in a stainless steel cylinder. A mu-metal plunger core causes opposing changes of inductance when it is displaced through the centre of the coils. These changes are converted by the integral electronic circuit into a signal proportional to the displacement. The circuit contains an oscillator, demodulator, a 12 bits A/D converter and a micro-processor with integral CAN interface. The transducers are completely sealed to ensure positive protection against vibration, shock, humidity, oil and corrosive matter. Standard measuring strokes: 20 mm, 40 mm, 100 mm, 200 mm General features The IWN transducers conform to the CANopen interface for Encoders to the CIA specification DSP 406 / Class 1 and Class 2. Besides administrative and pre-defined messages such as Energency-Messages and Synchronization, support is given to Service Data Objects (SDOs) and Process Data Objects (PDOs). PDOs are used for data exchange between master and slave, SDOs are used for direct reading and writing access to Object Registers between master and slave. The main application of SDOs is the device configuration, e.g. modification of the transmission type Tx-PDO-Object 1800 H. TWK-ELEKTRONIK GmbH ■ PB. 10 50 63 ■ D-40041 Dusseldorf ■ Tel.: +49/211/63 20 67 ■ Fax: +49/211/63 77 05 ■ info@twk.de ■
Open the catalog to page 1■ Node address (Object 2000): Inductive Displacement Transducers Model IWN 250 Output signls to ISO / DIS 11898 20, 50, 125,250, 500, 800 kBaud or 1 MBaud (adjustable via LSS) Default: 20 kBaud ■ Alarms: Device specific Error (e. g. EEPROM-error, CRC-error, internally-error, sensor-error, ...) Block diagram Operating modes (can be programmed via SDO) ■ Polling mode (asynchronous-RTR*): The transducer sends its actual position value when the master has called the actual position value through a Remote Frame telegram. ■ Cycle mode (asynchronous-cyclic / acyclic*): The transducer sends the...
Open the catalog to page 2Chrome-nickel steel Chrome-nickel steel Mu-metal Stainless steel ("T") Delrin M12x1, 8 pins, staight plastic (PBT) sockets, CuSnZn 6 - 8 mm (PG 9) 0.75 mm 2 max. screws IP66 Materials ■ External and internal tube ■ Plunger : ■ Core : ■ Spring and gauge head : ■ Sealing plug: Calibration Both the sensor system and the plunger core are calibrated as one unit. They carry the same serial number. Lengths and masses ( refer to drawings page 4) Order code format IWN 250 / 40 - 0.5 - KFN - KHN - C2 - N01 * Only for mechanical or electrical deviations from data sheet. CANopen - profil C2 CIA DSP 406...
Open the catalog to page 3Version with ball joint on plunger (KV) (without rod guide) pivot angle Version with ball joints on plunger (KFN) and on end of case (KFH) (with rod guide, captivated) Gauge version (T) with return spring (only up to 100 mm stroke) MB 25 Mounting block, brass Nickel plated (to be ordered separately) 2 hexagon socket screws M4/35 mm long are supplied with each item. Mass : 60 g Mating Plugs (to be ordered separately) STK8GS53: Counter connector straight, plastic STK8GS54: Counter connector straight, metal
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