Huf Hülsbeck & Fürst 04.09.
Huf Hülsbeck & Fürst 04.09.06 PDET/Witte 1. Functional Description - Comfort Access System (CA) 2. General system description The CA-system enables convenient utilization of the vehicle. To use the vehicle, the driver only needs to take the key along with him/her. The vehicle communicates with the system inductively via antennas. These antennas are driven inductively with a frequency of 125 kHz. The system's range is limited in a defined fashion by damping the body sheet metal.
Huf Hülsbeck & Fürst 04.09.06 5. PDET/Witte 1.4 Cabrio function procedure Since at the cabrio roof no trapping protection is available, it must be guaranteed that a valid passive key is in close range of the vehicle before and/or during the roof closes. With the help of a LF Ping telegram, which is sent over the door handle antennas and the bumper antenna, the CAS looks for the passive key for the start and during the Comfort latches procedure. Detection radius is approx.
Huf Hülsbeck & Fürst 04.09.06 6. Operating range of the inductive field (LF) ca.
Huf Hülsbeck & Fürst 04.09.06 7. Technical data carrier frequency bandwidth transmission power access control cabrio function Modulation 125kHz 122,50 kHz - 127,50 kHz Cannel Baudrate Power supply 1 4 kBd 9 ... 16 Volt operating range (LF) for access control for cabrio function < 1,5 m < 3m 8. PDET/Witte < 8 Watt < 70 Watt 100% ASK typical activity profile (for access control / cabrio function ? ) 27 handle operations in 24 hour (10.
Huf Hülsbeck & Fürst 04.09.06 PDET/Witte 10. Block diagram Sensetive Fläche Entriegeln 2 Kanal Kap-Sensor 5V Kl. 31 Reset Spannungsversorgung Trigger Kl. 30 Reset PASub-Bus PA-Sub-Bus Interface Sensetive Fläche Verriegeln Watchdog / Timer µP Zug-Hall 125kHz Modulation induktives 125 kHz Telegramm 4 kBit/s Diagnose short description Power supply : Stabilize the supply voltage. (Jump Start / Loaddump protection ...
Huf Hülsbeck & Fürst 04.09.06 Inductive amplifier: PDET/Witte Bridge amplifier for the 125 kHz signal antenna. The amplifier load a inductive antenna with series capacity (C600). The signal is modulated 100 % ASK. Data Transmission rate is 4 kBd.
Huf Hülsbeck & Fürst 04.09.06 PDET/Witte 11.
Huf Hülsbeck & Fürst 04.09.06 9.
Huf Hülsbeck & Fürst 04.09.
