LPMS-NAV3 Hardware Manual

LPMS-NAV3-RS232
LPMS-NAV3-TTL

 

 

System Overview

System Architecture

Pinout Description

M12 8-pin Connector

 

Pin

Name

Cable Color

Function

1

VCC

White

+5V~36V

2

GND

Brown

Ground

3

RS232_TX

RS485_A

Green

RS232 Transmit

RS485 Signal A

4

RS232_RX

RS485_B

Yellow

RS232 Receive

RS485 Signal B

5

NRST

Gray

Sensor Reset (Trigger low)

6

RES

Pink

Reserved

7

RES

Blue

Reserved

8

RES

Red

Reserved

Pin

Name

Cable Color

Function

1

VCC

White

+5V~36V

2

GND

Brown

Ground

3

RES

Green

Reserved

4

RES

Yellow

Reserved

5

NRST

Gray

Sensor Reset (Trigger low)

6

UART_TX

Pink

TTL Transmit

7

UART_RX

Blue

TTL Receive

8

RES

Red

Reserved

Pin

Name

Cable Color

Function

1

VCC

White

+5V~36V

2

GND

Brown

Ground

3

RS422_A

Green

RS422 Rx+

4

RS422_B

Yellow

RS422 Rx-

5

NRST

Gray

Sensor Reset (Trigger low)

6

RS422_Y

Pink

RS422 Tx+

7

RS422_Z

Blue

RS422 Tx-

8

RES

Red

Reserved

Pin

Name

Cable Color

Function

1

VCC

White

+5V~36V

2

GND

Brown

Ground

3

CAN+

Green

CAN_H

4

CAN-

Yellow

CAN_L

5

NRST

Gray

Sensor Reset (Trigger low)

6

RES

Pink

Reserved

7

RES

Blue

Reserved

8

RES

Red

Reserved

M12 5-pin Connector

 

Pin

Name

Cable Color

Function

1

RES

Brown

Reserved

2

VCC

White

+5V~36V

3

GND

Blue

Ground

4

RS232_TX

RS485_A

TTL_TX

Black

RS232 Transmit

RS485 Signal A

TTL Transmit

5

RS232_RX

RS485_B

TTL_RX

Gray

RS232 Receive

RS485 Signal B

TTL Receive

 

Connection Interface

Model

Communication Interface

TTL

RS232

RS422

RS485

CAN

LPMS-NAV3-TTL

×

×

×

×

LPMS-NAV3-RS232

×

×

×

×

LPMS-NAV3-RS422

×

×

×

×

LPMS-NAV3-RS485

×

×

×

×

LPMS-NAV3-CAN

×

×

×

Default settings for communication interface:

  • RS232/RS485/RS422/TTL: 115200bps,8N1

  • CAN: 500kbps, terminal resistor disabled

Coordinate System

The coordinate system for LPMS-NAV3 is shown on the label on the sensor:

Accelerometer output convention

A positive acceleration output will be produced when the sensor is accelerated at the same direction of the positive axes. When the sensor is at rest with Z axis pointing upwards, the calibrated output of the accelerometer is expected to be [0 0 +1g] indicating the acceleration due to the force of gravity.

Gyroscope output convention

Gyroscope output follows the right hand rule where rotation along an axis following the right hand convention will produce a positive angular velocity. The calibrated output of the gyroscope is expected to be close to zero when the sensor is at rest.

Euler output convention

Euler output is in degree. The rotation sequence follows global XYZ rotation. In other words, the current orientation of the sensor can be obtained by rotating at the euler values along global X → global Y → global Z axis.

Range of euler output is as follow:

  • X Angle: -180° ~ +180°

  • Y Angle: -90° ~ +90°

  • Z Angle: -180° ~ +180°

Specifications

Main Parameters

Parameter

Description

Value

Units

Min.

Typ.

Max.

Power supply

 

5

12

36

V

Dimensions

 

 

50x42x28.15

 

mm

Weight

 

 

~77.5

 

g

Euler Range

roll

-180

 

180

°

 

pitch

-90

 

90

yaw

-180

 

180

Resolution

 

 

0.01

 

°

Power consumption

LPMS-NAV3-TTL

 

0.072
(0.006A@12V)

 

W

LPMS-NAV3-RS232

 

0.084
(0.007A@12V)

 

LPMS-NAV3-RS422

 

0.072
(0.006A@12V)

 

LPMS-NAV3-RS485

 

0.072
(0.006A@12V)

 

LPMS-NAV3-CAN

 

0.096
(0.008A@12V)

 

Output rate

 

5

100

500

Hz

Baudrate

TTL/RS232/RS422

9600

115200

921600

bps

RS485

9600

115200

256000

CAN

125K

500K

1M

Communication Protocol

TTL/RS232/RS422/RS485

 

LPBUS

 

 

CAN

 

CANOpen/SequentialCAN

 

 

Temperature range

 

-20

20

80

°C

Water proof

 

 

IP67

 

 

Accelerometer Parameters

Parameter

Value

Unit

Measurement range

±2/±4/±8/±16

g

Linear acceleration sensitivity

0.061/0.122/0.244/0.488

mg/LSB

Linear acceleration sensitivity change vs temperature

±0.01

%/°C

Linear acceleration zero-g level offset accuracy

±10

mg

Linear acceleration zero-g level change vs temperature

±0.1

mg/°C

Acceleration noise density

60

μg/√Hz

Gyroscope Parameters

Gyroscope Z-Axis

Parameter

Description

Value

Unit

Min.

Typ.

Max.

Scale factor

24 bit

 

17920

 

LSB/dps

Scale factor tolerance

25°C

-2

 

2

%

Scale factor variation over temperature

 

-3

 

4

%

Bias tolerance

25°C

-1

 

1

dps

Bias variation over temperature

 

-1

 

1

dps

Range

 

-400

 

400

dps

Non linearity

25°C

-0.5

 

0.5

%FS

Cross axis sensitivity

25°C

-5

 

5

%

Gyroscope X and Y Axis

Parameter

Value

Unit

Measurement range

±125/±250/±500/±1000/±2000/±4000

dps

Angular rate sensitivity

4.375/8.75/17.50/35/70/140

mdps/LSB

Angular rate sensitivity change vs temperature

±0.007

%/°C

Angular rate zero-rate level

±1

dps

Angular rate zero-rate level change vs temperature

±0.005

dps/°C

Rate noise density

5

mdps/√Hz

Packaging details