Product Description

 

Applications:
1. Road traffic
2. Automotive anti-collision
3. Construction survey and design
4. Levelmaterial level detection
5. Robot arm control
6. Fixed length control of container crane spreader
7. Security monitoring
8. Military applications

Product features

1). Mm level measurement accuracy
2). Continuous detection of a moving object
3). For high temperature/dusty environment
4). Precision-heavy-no need to reflect board
5). With regional test, control system and numeration function

 

 

Laser Distance Sensor	FST-250D	FST-250A	FST-250K
Measuring Range	0.15m to 250m*	0.15m to 250m*	0.15m to 250m*
Measurement rate ( Up to )	5Hz
Measuring accuracy	±1mm**	±1mm**	±1mm**
Smallest unit displayed	1mm	N/A	N/A
Laser class	II	II	II
Laser type	635nm,<1mW	635nm,<1mW	635nm,<1mW
Laser beam diameter approx. -at 10m distance -at 50m distance	6mm 30mm	6mm 30mm	6mm 30mm
Measurement time	20-100ms
Measuring mode -trigger measuring -continuous measuring	yes yes	yes yes	yes yes
Operation mode	commands by computer	commands by computer	commands by computer
Output mode	Digital output: RS232 serial output	Analog output: 4-20mA current output	Switch output: 2 ways switch output
Power supply	DC 5V/1A	DC 24V/1A	DC 5V/1A
Power consumption	<3W	<3W	<3W
Storage Temperature	-25℃ to 70℃	-25℃ to 70℃	-25℃ to 70℃
Operating Temperature	0℃ to 40℃	0℃ to 40℃	0℃ to 40℃
Dimension	136 x 71 x 45 mm	136 x 71 x 45 mm	136 x 71 x 45 mm
Housing material	aluminium alloy
Protection class	IP67
Safety class	II
Certifications	CE,FDA
Standards applied	IEC 60947-5-2
Weight	290g	290g	290g

 

Using instructions

1 Cable connecting definitions

Red line         ——       +5V

Black line       ——       PGND

Yellow line     ——       TXD

Green line      ——       RXD

Blue line        ——       DGND

       2 Operating Steps

       2.1 Connect a sensor to the serial port of computer (or other device which have serial ports) and the power port of adapter with special data cable.

              2.2 Trigger Measuring

                     2.2.1 Send the command “O” (ASCII) or “0X4F” (HEX) by computer to turn on the sensor. Then the sensor will turn on the laser and prepare for working, and return the data “FF 00 0A 0A 0A 00” to the serial interface.

                     2.2.2 Send the command “O” (ASCII) or “0X4F” (HEX) again to the sensor to start to measure distance. The sensor will return the measured data like “FF XX XX XX XX XX XX” to the serial interface and turn off the laser when it finished one time measurement.

                     2.2.3 Send the command “U” (ASCII) or “0X55” (HEX) to turn off the sensor.

              2.3 Continuous Measuring

                     2.3.1 Send the command “O” (ASCII) or “0X4F” (HEX) by computer to turn on the sensor. Then the sensor will turn on the laser and prepare for working, and return the data “FF 00 0A 0A 0A 00 00” to the serial interface

                     2.3.2 Send the command “C” (ASCII) or “0X43” (HEX) to the sensor. The sensor will begin to measure continuously after 3 seconds when it got the order, and return the data continuously like “FF XX XX XX XX XX XX”. If the sensor couldn’t get any available data, it will return “FF 00 0A 0A 0A 00” to the serial interface.

                     2.3.3 Send the command “U” (ASCII) or “0X55” (HEX) to turn off the whole sensor (include both of laser unit and measuring unit).

Input and output

       1 Data format for RS232 serial communication

       Baud rate: 9600 bps , Data bits: 8 , Stop bit: 1 , Parity bit: None

       2 RS232 input frame format

There is only one byte in every input frame. The user could send different commands to the sensor for different purpose, the functions of command are shown in the following table.

3 RS232 output frame format

There is 6 bytes in every output frame, the frame header is 0XFF, MSB is A, LSB is E. Their orders are shown in this table here.

The mapping table of HEX and ASCII codes: