SCALANCE W-700

Industrial use of radio technology requires especially reliable connections. A fault-tolerant modulation system is included in the 802.11 b/g standard. The data rate is reduced at defined steps to maintain the radio link even for large distances or in the event of reflections from metal objects. All this is part of the IEEE 802.11 standard with data rates up to 54 Mbit/s at 2.4 GHz and 5 GHz. Moreover, both bands support the turbo mode function with up to 108 Mbit/s in which two neighboring channels are combined. Turbo mode, however, does not comply with IEEE.

Industrial WLAN of SIMATIC NET offers a transfer mechanism on the basis of standard WLAN according to IEEE 802.11 that provides all the stations with a defined data rate. The access of all stations can thus be predicted.

With standard WLAN all the stations access the wireless channel in an uncoordinated fashion. The access of stations with critical data cannot be predicted

Industrial WLAN of SIMATIC NET offers an expansion of the standard IEEE 802.11 that provides selected stations with a defined data rate. The access of stations with critical data can thus be predicted.

Use in harsh industrial environments requires rugged products, especially if they are to be used outside control cabinets. IWLAN components from SIMATIC NET have been designed with IP65 degree of protection and for operating temperatures between –20°C and +60°C with condensation and fulfill the strict SIMATIC requirements with respect to shock and vibrations. The connectors are vibration-proof and shake-proof.

Protection against unauthorized access and data encryption are requirements which are not only needed for transmitting secret recipes. Industrial WLAN complies strictly with the 802.11 IEEE and WiFI (Wireless Fidelity) specifications to permit a high degree of interoperability. The new WPA (WiFi Protected Access) mechanisms and encryption with AES (Advanced Encryption Standard) have rectified the known security problems of WLAN and WEP (Wired-Equivalent-Privacy).

Downtimes of segments and connected Industrial Ethernet network stations are minimized in the event of a fault through use of the C-PLUG. C-PLUG permits fast and simple device replacement of SIMATIC NET components without reconfiguration of the spare part.