Keywords
Citation
(1998), "Low cost modular digital/analogue output linear position transducers", Sensor Review, Vol. 18 No. 3. https://doi.org/10.1108/sr.1998.08718caf.006
Publisher
:Emerald Group Publishing Limited
Copyright © 1998, MCB UP Limited
Low cost modular digital/analogue output linear position transducers
Low cost modular digital/analogue output linear position transducers
Keywords Computer Controls Ltd, Transducers
The UniMeasure LX-EP (digital) and LX-PA (analogue) series of linear position measuring transducers are available throughout Europe from Computer Controls. These low cost, compact units, find use in nonaggressive, light industrial applications, similar to those found in moisture free environments. The thermo-plastic bodied devices are suitable for high volume OEM outputs where cost is a major consideration and small size and/or low weight are of paramount importance.
Key features include:
- •
Ease of installation;
- •
1,250mm range;
- •
Repeatability ±0.15 per cent (LX-EP) and +0.03% (LX-PA).
In operation the devices are mounted in a fixed position. A multistranded stainless-steel wire-rope that wraps around an internal capstan is attached to the object whose position is to be measured. Near constant tension is maintained on the wire-rope by an internal motor spring. As movement occurs, the extendible wire-rope rotates the internal capstan, which in turn rotates either an optical encoder (LX-EP) or a precision potentiometer (LX-PA).
With a supply voltage applied to the LX-EP, a two-channel square-wave signal in quadrature, current sinking is produced, as the extension of the wire-rope occurs. Electrical parameters include an excitation voltage of 5.0Vdc ±0.25 per cent, an excitation current of 30mAmax and a TTL output level.
When a regulated voltage is applied to the LX-PA potentiometer, a voltage output directionally proportional to the wire-rope extension is produced. Electrical characteristics include input impedance of 1k‡ ± 15 per cent, an output impedance of 0 1k‡, and an excitation voltage of 25Vac/dcmax.
For further information contact either: Mr Henry Schuster, Managing Director, or Miss Suzanne Lee, Sales Department, Computer Controls Ltd, 20/24 Kirby Street, London EC1N 8TS. Tel: +44 (0) 171 405 6060; Fax: +44 (0) 171 405 2040.