Siemens AG 2008 SIMATIC PXO photoelectric proximity switches Introduction PXO series Photoelectric proximity switches fast The photoelectric proximity switches are organized in different and accurate sensing with light and laser product families in accordance with their technical version and design: SIMATIC sensors Version Design PXO100 Cylindrical version, D4, M5, M12 mini PXO200 Cylindrical versions M18, M18S, L18 2 PXO300 Cubic version, mini K21, K21R, K20, L20, C20 PXO400 Cubic version, small K31, K30 PXO500 Cubic version C40, L50, L50HF, L50HF adv., C50 PXO600 Cubic version, large K80, L80HF, L90L PXO800 Special device GL, LV70 amplifiers Application The various versions of the photoelectric proximity switches are Pure photoelectric astuteness this is what distinguishes these predominantly used in the following applications: extremely precise, quick-acting and accurately pin-pointing photoelectric proximity switches. This is supplemented by first- In conveyor systems class ease of adjustment using a teach-in function or potentiom- In packaging machines eter and easiest possible handling during operation. With the In mechanical engineering wide range of different designs, from cubic to cylindrical right down to miniature designs and different types, e.g. as diffuse In paper, textile and plastics processing sensors with or without background suppression, retroreflective In printing machines or thru-beam sensors, they master any task with a range of up to For access control. 50 m superbly. These photoelectric sensors detect all objects regardless of their composition, whether metal, wood or plastic. Highlights Special versions of the K20 form in miniature enclosure and the C40 are available for detecting transparent objects. Special de- Extremely precise and quick-acting with vices such as the color sensor or color mark reader can be used pin-point locating ability to detect differences in color or contrast. The analog laser sup- ports extremely precise distance measurements and position Maximum performance even over large distances monitoring. Small, compact enclosure Sensors for Ex Zone 2/22 Degree of protection up to IP68 The K80 ATEX photoelectric proximity switch is Adjustable ranges approved according to EU Guideline 94/9/EG (ATEX) Easy commissioning (teach-in) Appendix VIII Suitable for global use (UL/CSA) The approval is for: Configurator Gas EX II 3G EEx nA II T6x and A configurator for photoelectric proximity switches is available in Dust EX II 3D IP65 T 80 C x the Mall. Based on the technical features required, the desired The functionality of the photoelectric proximity switches with product can be quickly and easily selected, placed in the shop- ATEX approval is identical to that of the standard proximity ping cart and ordered. switches. The configurator can be reached by the following link: Safety-related applications www.siemens.com/simatic-sensors/px The use of the sensors is not permissible for applica- tions in which the safety of persons is dependent on the function of the proximity switch. NSD0 00801 Siemens FS 10 2009 2/78 Siemens AG 2008 SIMATIC PXO photoelectric proximity switches Introduction Photoelectric proximity switches Dimension a Design D4/M5 50 mm The devices can be mounted in any position. They should be M12 250 mm installed in such a manner as to prevent dirt deposits as far as possible. The available accessories enable the devices to be M18 250 mm mounted easily and correctly. K31 250 mm K30 750 mm Alignment K80 500 mm Diffuse sensor 1) L18 (laser light barrier) 150 mm 2 The sensor must be aligned with the object to be sensed to L50 (laser light scanner) 30 mm ensure reliable switching. In devices that have a surplus light L50 (laser light barrier) 80 mm function, the relevant LED must be active. C50 (color sensor) 500 mm Reflex sensors Place the reflector at the required location and secure it firmly. 1) Focusing at 50 m. Cover the reflector with adhesive tape so that only the center Setting the operating distance (approximately 25 % of the surface) remains free. Sensitivity is either adjusted using a built-in potentiometer or Install the reflex sensor so that it switches reliably. taught by means of a teach-in function. When a potentiometer is Finally remove the adhesive tape from the reflector. used, turning clockwise increases sensitivity and thus the achievable operating distance. Thru-beam sensors Place the receiver in the required position and secure it firmly. Diffuse sensor and diffuse sensor with background suppression Align the emitter with the receiver as accurately as possible. The object is positioned in front of the sensor inside its sensing range. Set the sensitivity, or distance, in such a way that the ob- Minimum clearance ject to be scanned is sure to be sensed. If necessary, the surplus The proximity switches must not interfere with each other. There- light display (green LED) must be active. The object must then fore a minimum distance a must be observed between two sen- be removed. If the output remains on, sensitivity must be re- sors. The following distances are recommended values only. The duced. values given are for maximum sensitivity. In devices with teach-in function, sensitivity is adjusted automat- ically. During this process, the sensor is taught the two states Object ther andObject not ther by pressing the keys. Reflex sensors and thru-beam sensors In normal cases, the sensor is always operated with sensitivity at maximum. This produces the maximum surplus light. It is usually only necessary to reduce sensitivity for sensing very small or transparent objects. The procedure is the same as for diffuse sensors. Diffuse sensor Cable length Long cables between the devices result in: Additional capacitive loading (short-circuit protection) Increased injection of interference. For this reason the specified maximum cable length must not be exceeded. Reflex sensor Thru-beam sensor. Siemens FS 10 2009 2/79