Access Easy Controller Convertor Card | en 151Bosch Security Systems Hardware Manual Ver 2.0.0 | 2006.0719.1.3 LED IndicatorsThere are 4 Light Emitting Diodes (LEDs) on the Convertor Card. The status of these LED indi-cators allows for quick diagnostics purposes. Their indicating status is described below: -CPU This LED will be blinking constantly, it is an indication of the card is still run-ning normally.Tx & Rx Indicates the communication between the Secure/Communication Card. Itshould be flickering at all times.Card Read Whenever a reader reads a card this LED will blink once.