Continental Automotive Technologies 5WK49264 Key User Manual
Continental Automotive GmbH Key
User Manual
Annex No.5 
Technical Description 
Key: 5WK4 9264 

Siemens VDO Automotive AG    SV C BC P2 RF 
 IC: 267T-5WK49264                FCC ID:KR55WK49264 
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 User Manual / Functional Description 
of the  
Siemens VDO 
 Radio Frequency Transmitter  
Type 
 5WK49264 

Siemens VDO Automotive AG    SV C BC P2 RF 
 IC: 267T-5WK49264                FCC ID:KR55WK49264 
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1. SYSTEM OVERVIEW 
 The RF remote control system consists of a RF transmitter and a RF 
receiver. The RF transmitter is mechanically integrated in the head of the 
key. This transmitter is used to transmit information for locking or unlocking 
the vehicle as also Trunk Lid/Approach Light/Panic/comfort open/Comfort 
Close operations by an unidirectional RF transmission line for normal 
remote operation by pressing a button. The information will be transmitted 
on the first channel and afterwards also on the second channel.  
2. POWER SUPPLY 
 The transmitter is provided with 1 Lithium battery (CR 2430) that gives a 
tension of feeding of +3V.  
The battery inversion is protected mechanically. 
3. BUTTONS 
 All buttons are on the top side of the key housing. They are arranged in the 
following way. 

Siemens VDO Automotive AG    SV C BC P2 RF 
 IC: 267T-5WK49264                FCC ID:KR55WK49264 
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4. BLOCK DIAGRAMM 
The block diagram below shows the main electronic units of the transmitter: 

Siemens VDO Automotive AG    SV C BC P2 RF 
 IC: 267T-5WK49264                FCC ID:KR55WK49264 
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5. TYPICAL USAGE PATTERN 
 25 lock/unlock /Trunk Lid/Approach Light/Panic/comfort open/Comfort 
Close operations in 24 hours with average transmission duration of  
0.84 seconds → 1, 04 lock/unlock operations within one hour 
Transmitter ON  0.875    seconds / hour 
Transmitter OFF  3599.12  seconds / hour 
Duty Cycle: TON / T (ON+OFF)  x 100% = 0.875 / 3,600 x 100 % = 0.02 % 

Siemens VDO Automotive AG    SV C BC P2 RF 
 IC: 267T-5WK49264                FCC ID:KR55WK49264 
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6. TECHNICAL DESCRIPTION 
 Carrier frequency (incl. Tolerance):  433, 67 MHz / 434,251MHz  
Output power/field strength:    < 10 mW 
Type of modulation:      GFSK 
Method of frequency generation: fractional N PLL synthesizer 
Number of channels:      2 ch 
Power supply:        battery (CR 2430) 
Nominal voltage                                   3,0V  
Voltage supply range:                          2,4V ... 3,2V  
Type of battery:    lithium 
Transmission range:      100 m (system range) 
Type of antenna:                                  PCB loop antenna  
Length/size of antenna:                       ca. 4 ...5cm  
7. LABEL DESIGN  CANADA, EUROPE, USA 
 Siemens VDO 
5WK49264 
IC: 267T-5WK49264 
FCC ID:KR55WK49264 
8.  ENTRY OWNERS MANUAL CANADA, USA: 
NOTE 
This device complies with part 15 of the FCC Rules and RSS-210. Operation 
is subject to the following two conditions: (1) This device may not cause 
harmful interference, and (2) this device must accept interference received, 
including interference that may cause undesired operation. 
COUTION 
Changes or modifications not expressly approved by the manufacturer could 
avoid the user's authority to operate the equipment.