SIMATIC Mobile Panel 277 IWLAN. The SIMATIC Mobile Panel 277 IWLAN features a high-contrast 7.5" TFT display The user memory of 6 MB can be expanded further via MultiMedia card for recipes and archive data For safety-oriented applications, the Mobile Panel communicates via a "Rapid Roaming" process in order to ensure interruption-free transmission of the wireless signals Mobile Panel 277F IWLAN for safety-related applications include color display of the WLAN signal strength with an additional vibration alarm, which is triggered when a specific lower limit threshold is violated Available in several device variants