CHAPTER 2Elements on A85025All three LEDs are on while the device is in reset state or bootingthe (Linux) operating system kernel.The PWR and RUN LEDs are on and the USR LED is off while theA850 is initialized (the CF card is checked, the configuration isloaded and various services are started).The activity LED flashes for 0.1 seconds if there is an RTU com-mand sent or if the answer is received.The “Error mode” LED pattern is used if there is a serious hard-ware error (unable to read CF card).The “No configuration mode” LED pattern is used as factorydefault (as long as there is no root password configured and nobasic network configuration given).The “Battery low power” LED pattern is used while shutting downthe Gateway due to low battery.ConnectorsFigure 3. Back of A850Mains:AC Power Inlet (3 pin male connector for 90 - 240 V)Radio Modem (connection to A440):M 12 circular 4 pin female connector
