Siemens SIMATIC HMI 277 IWLAN Información Del Producto página 11

Ambient temperature
The HMI device has been designed for use with ambient temperatures ranging from 0°C to +40 °C.
Note
Charging the batteries
With the HMI device in productive operation, the batteries will be fully charged in the docking station up to an ambient
temperature of 40 °C.
When the HMI device is turned on and resting in the docking station, the following applies:
● Battery charge in the HMI device is retained up to an ambient temperature of 40 °C.
● The batteries in the docking station will be fully charged up to an ambient temperature of 35 °C.
LED display
Note
The "BAT" LED will start flashing as soon as the HMI device is placed in the docking station and charging begins. Make sure
that the HMI device is correctly positioned in the docking station for charging of batteries.
Specification of USB interface
Note
Use the USB interface for commissioning and maintenance only.
The line length of the connected USB devices may not exceed 3 m.
Transponder operation - frequency bands
Note
For transponder operation with automatic zone detection, the 2.4 GHz band will be used exclusively by the Mobile Panel
IWLAN.
WLAN operation requires the 5 GHz band (IEE 802.11a).
It is not possible to operate other RFID systems in the 2.4 GHz band at the same time (z. B. MOBY U or MOBY R systems).
Access Point - wireless communication
Note
Communication with more than one access point to cover larger WLAN areas is not possible without interruption.
For wireless Ethernet-based communication, for example, with PROFINET IO, HTTP, Sm@rtAccess, Sm@rtService and
OPC, the end user is responsible for the security of the data network. The secure operation of the HMI device cannot be
guaranteed under all circumstances. Interference from outside the wireless network can cause an overload of the HMI
device, for example.
The "Storm Threshold" function in the Siemens Access Point SCALANCE must be selected. This option has to be selected
to ensure stable plant operation when the load on the network is high. The following settings have to be made for broadcast
message frames:
● Address threshold: 255
● Wireless: 255.
PROFINET IO
Note
To improve the safety of your application, request the life sign bit in your CPU application.
Charging station
The charging station corresponds to safety class III according to EN 61131-2:2007 and EN 60950-1:2006.
Mobile Panel 277 IWLAN, Mobile Panel 277F IWLAN
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A5E02615843-01, 08/2009