Continental Automotive S180020 Tire pressure monitoring system User Manual Annex No

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Document ID	1235355
Application ID	k1Y/wwbXSEdBZX6Pv4vAOw==
Document Description	User Manual
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
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Filesize	7.64kB (95515 bits)
Date Submitted	2010-02-01 00:00:00
Date Available	2010-02-01 00:00:00
Creation Date	2009-11-13 12:27:23
Producing Software	Microsoft® Office Word 2007
Document Lastmod	2009-11-13 13:28:21
Document Title	Annex No
Document Creator	Microsoft® Office Word 2007
Document Author:	m.dudde

Annex No.5
Page 1 of 6
Functional description
S180052020
User Manual / Functional Description
of the
Continental
Tire Pressure Generation 1C wheel unit
Type
S180 052 020
1 of 5
1. SYSTEM OVERVIEW
The tire pressure monitoring system (referred as TG for Tire Guard) consists of the following
units:
- Tire guard wheel unit type S180 052 020 which includes an integrated pressure, temperature
and acceleration sensor and a RF transmitter.
- RF receiver unit which includes a RF receiver (not described in this document)
The TG monitors a vehicle's tire pressure whilst driving or stationary. An electronic unit (wheel
unit) inside each tire, mounted to the valve stem, periodically measures the actual tire pressure.
By means of RF communication, this pressure information is transmitted to the RF
receiver/decoder.
2. TECHNICAL DESCRIPTION
Carrier frequency:
Frequency FSK deviation:
Number of channels:
Type of modulation:
Baud rate:
Rated Output Power:
Antenna:
Voltage supply:
Voltage supply range :
433.92 MHz
 40 kHz max
Frequency Shift Keying (FSK)
9600bds
< 10mW
Internal
1 Lithium battery 3V (CR2450)
2.1 up to 3.2V
2 of 5
3. TYPICAL USAGE PATTERN
DUTY CYCLE CALCULATION (EN 300 220-1)
PARKING: 1 burst transmission every 13H + 1 WUP transmission
FIRST BLOCK: During 2 minutes after vehicle start, burst emission every 16.8s (8 burst emission)
INTERIM FIRST BLOCK: none transmission
DRIVING: 1 burst emission every 67.2s during the rest of the hour (54 burst emission)
INTERIM: none transmission
=> During 1 hour, the Wheel Unit transmits 63 bursts + 1 WUP.
1 burst = 30.29806ms MAX
1 WUP length max = 42.1ms MAX
 total transmission during 1 hour = 63 x 30.29806ms + 42.1ms = 1.96s
DUTY CYCLE = (1.96 / 3600) x 100% = 0.06%
AVERAGE FACTOR CALCULATION (Standard 47 CFR Part 15C (periodic intentional
transmitter))
WUP definition:
- Modulation FSK for the WUP
- 10 blocks in the WUP
- 5 bytes à "00" manchester in each blocks
 WUP length = 41.664ms 1% (max = 42.1ms)
 Averaging factor = 20xlog(42.1/100)=-7.5dB
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4. BLOCK DIAGRAM
The block diagram below shows the main electronic units of the wheel unit:
ANTENNA
P re ssu re ,
te m p e ra tu re ,
a cce le ra tio n
se n so r a n d
µ co n tro lle r
R F C IR C U IT
L e a rn in g co il
3V
L IT H IU M
BATTERY
4 of 5
5. PICTURE
Label
Continental
S180052020
FCC ID: KR5S180020
IC: 7812D-S180020
Operation is subject to the following two conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any interference received, including interference
that may cause undesired operation.
USA:
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
Changes or modifications not expressly approved by the party responsible for compliance
could void the user's authority to operate the equipment.
5 of 5

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