Omron OKA-450R Bedienungsanleitung

OKA-450R

(P/N:96486309)

(P/N:96486310)

Receiver, Tire Pressure Monitoring System

-1 -

FCC Statement

A.User’s Guide

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.

B.FCC Compliance statement

This equipment has been tested and found to comply with the limits for a Class B

digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide

reasonable protection against harmful interference in a residential installation.

This equipment generates, uses and can radiate radio frequency energy and, if not installed

and used in accordance with the instructions, may cause harmful interference to radio

communications. However, there is no guarantee that interference will not occur in a

particular installation. If this equipment does cause harmful interference to radio or

television reception, which can be determined by turning the equipment off and on, the user

is encouraged to try to correct the interference by one or more of the following measures:

-Reorient or relocate the receiving antenna.

-Increase the separation between the equipment and receiver.

-Connect the equipment into an outlet on acircuit different from that to which the

receiver is connected.

-Consult the dealer or an experienced radio/TV technician for help.

C.Caution !!!

Any changes or modifications to the equipment not expressly approved by the party

responsible for compliance could void user’s authority to operate the equipment.

-2 -

Table of contents

1. Constitution of the Tire Pressure Monitoring System for vehicle....................... 2

2. User’s manual (provisionally) .......................................................................... 3

3. Block diagram ................................................................................................ 4

4. Specification ................................................................................................... 5

5. Features .......................................................................................................... 6

6. PCB

6.1

Parts layout (front)...................................................................................... 7

6.2

Pattern layout (front).................................................................................... 8

6.3

Parts list ...................................................................................................... 10

7. Connector ..................................................… ................................................. 13

8. Photographs .................................................................................................... 14

Appendix Circuit Diagram

-3 -

1. Constitution of the Tire Pressure Monitoring System

for vehicle

Tire Pressure Monitoring System is the system that receives the information, from transmitters installed at

each tire, about the inflation pressure or temperature of tires detected by the sensor, so that the system can

detect the abnormality of tires like fallen inflation pressure. This system consists of transmitter, receiving

antenna, and receiver. The transmitter sends information of tire, read by the sensor, in the form of radio

wave at constant intervals. The receiver is fixed inside the vehicle. If IG is OFF, it works intermittently to

prevent the battery exhaustion. When the receiver detects the synchronous code and IG is ON, it runs

continuously to receive the signals completely. If the received code is normal, the system will not inform

the user. As shown below, in the case that the transmitter sends information that the tire is in abnormal

condition, and that the receiver system has a trouble, the system will inform the user with lighting up

Warning bulb.

TPMS Warning bulb is lit by the following situations.

Bulb disconnection detection output(The warning light is On for 3 sec. when IG=OFF→ON)

Tire air pressure warning output (Warning light is ON)

System warning output (Warning light is blinking)

Pressure sensor

CPU

Receiving circuit

CPU

Bulb

EEPROM

Transmission circuit

Transmitter 1

Receiver

Inside Antenna

Transmitter 2

Transmitter 3

Transmitter 4

Figure 2-1 System Architecture

Tire

Transmitter (Spare Tire)

-4 -

2. User’s manual (provisionally)

Tire inflation pressure warning light

This light illuminates if the inflation pressure of any tire (except for compact spare tire) drops while the

ignition key is in the “ON”position. It normally illuminates when the ignition key is turned to the “ON”

position and goes off a few seconds later.

If the warning light illuminates while driving

Avoiding hard braking, hard steering, and high speeds, drive to the nearest gas station or authorize car dealer

and adjust the tire inflation pressures.(except for compact spare tire)

If the warning light blinking while driving

It is thought abnormality of the device,go to the check to the nearest car dealer as soon as possible.

Whenever the tires and wheels are replaced with new ones

Tire inflation pressure sensors must be fitted on the new wheels and their ID codes must be programmed into

the system. Have tire and wheel replacement performed by an authorized car dealer to avoid the risk of

damaging the tire inflation pressure sensors.

CAUTION

·If the tire inflation pressure warning-light does not illuminate when the ignition key is turned to the “ON”

position the system may be faulty.

·If the tire inflation pressure warning light illuminates while you are driving, avoid hard braking, hard

steering, and high speeds. Otherwise, you could make the vehicle unstable and have a serious accident.

·The tire inflation pressure warning light may not illuminate immediately in the event of a tire blowout or

rapid leak..

Warning light

-5 -

3. Block diagram

This is the block diagram concerning to the receiver.

10.178125 MHz

8 MHz

Figure 3.1 block diagram of the receiver

16BIT

CPU

RECEIVING

MODULE

EEPROM

POWER

SOURCE(5V)

data

OUTPUT

CIRCUIT

input

output

Signal of vehicle status

12V (car battery)

bulb

IG1

-6 -

4. Specification

4.1 CPU TYPE M301N2F8T-FP

Manufacture : Renesas

Memory type Flash memory

ROM (bytes) 64K

RAM (bytes) 3K

Operating voltage (V) 4.2 to 5.5

Operating temperature (°C) -45 to 85

Operating frequency (MHz) 16

Timer (ch) 16bit x 1 8bit x 4

DMAC (ch) -

Serial I/O Clock Sync./UART x 2

A/D converter 10bit x (12 + 2) ch

D/A converter 8bit x 1

External Interrupts (sources) 8

CRC Operation Circuit -

Watchdog Timer Avl.

CAN (ch) 1

Special function CAN SIO Sub clock Serial I/F

Remarks Automobile

4.2 EEPROM

Local clock frequency 315 MHz

Frequency generation Crystal resonator

Modulation Single Superheterodyne

Bandwidth ±200KHz

Sensitivity 30dBuV

-7 -

4.3RF block

Type S-93C66AMFN-TB

Manufacture : ETC

Memory 4Kbit

Package 8pin SOP

4.4Others

Dimension 95mm×85mm×30mm

Weight 180g

Battery Car Battery (DC 12V)

Operation Voltage DC 12V, 20mA

Operation temperature -30?~ +85?

5. Features

Battery saving

The receiver works intermittently to reduce the battery consumption. The microcomupter embedded on

the receiver controlls the power supply for the RF circuit. In case of the microcomputer detects the

wake-up signal during the power supplied, the microcomputer continue supplying the power until the data

frame will be received.

-8 -

6.Connector

This is the pin assignment of the connector.

Figure 6.4.1 the shape of the connector

Figure 6.4.2 This is the pin assignment of the connector

-9 -

7.Difference between 96486309 and 96486310

96486309 : When OKA-450R Receiver is using with the OKA-210T model which send the data when Tire

Pressure is less than 210 kPa, the part number “96486309” is assigned.

96486310 : When OKA-450R Receiver is using with the OKA-220T model which send the data when Tire

Pressure is less than 220 kPa, the part number “96486310” is assigned.

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