Siemens IEEE802.11 Especificações Página 53

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Siemens IK PI · 2015
Industrial Wireless Communication
IWLAN – Access Points IEEE 802.11n
SCALANCE W774 M12 EEC for enhanced environmental conditions
6
Function
The SCALANCE W774 M12 EEC (Extended Environmental
Conditions) are designed for use in railway applications.
The devices satisfy EN 50155, the approval for railway appli-
cations, and can thus be used for rail traffic. Combined with the
antennas approved for railway applications, which are con-
nected via R-SMA antenna connectors (female), these products
can set up a reliable IWLAN wireless infrastructure.
The devices can be installed at the location that is most
favorable for the wireless link. The enclosure and the connectors
are resistant to high levels of shock and vibration because all
the connectors are screwed or locked. The SCALANCE W774
M12 EEC is well suited to environments in which a compact
design plays a large role. Through its coated printed-circuit
boards (Conformal Coating), the module is resistant to conden-
sation caused by use in environments with large temperature
variations.
SCALANCE W774-1 M12 EEC access points can also be
operated as client modules.
Provided that a delay (several 100 ms) caused by roaming in
accordance with IEEE 802.11 is tolerated by all communication
stations when switching the radio cells, the communication
continues uninterrupted.
For real-time requirements, the SCALANCE W774-1 M12 EEC
can be equipped with KEY-PLUG functionality for activating
iFeatures.
Data transfer in trains with SCALANCE W774-1 M12 EEC
Tablet,
smartphone or
laptop
Passenger
G_IK10_XX_30338
Industrial Ethernet
SCALANCE W774-1
M12 EEC
ANT 795-6MN
Kap_06_IWC_en.book Seite 53 Dienstag, 7. Oktober 2014 1:47 13
© Siemens AG 2014
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