SANKOE SKD-40D User manual

SKD-40D Laser Distance Sensor
USER MANUAL
Version 3.1
Getting more info & supports from http://www.top1sensor.com

Contents
1. Overviews.................................................................................................. - 1 -
2. Features......................................................................................................- 2 -
3. Specifications........................................................................................... - 2 -
4. Using Instructions.................................................................................. - 4 -
4.1 Definitions of connectioncable........................................................- 4 -
4.2 Operating Steps................................................................................ - 4 -
5. Inputs and Outputs................................................................................- 5 -
5.1 Communication Setting....................................................................- 5 -
5.2 Input data format............................................................................. - 5 -
5.3 Output data format.......................................................................... - 5 -
6. Troubleshooting......................................................................................- 6 -
6.1 Factors affecting the measurement range...................................... - 6 -
6.2 Error code display............................................................................. - 7 -
7. Contact Us................................................................................................. - 8 -

Laser distance sensor user manual
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Please read the user manual carefully before using our products and
avoid looking directly at the laser during operation.
1. Overviews
SANKOE.LTD is a professional manufacturer from China who provides high
performance laser distance sensor and customized service. Top1senser.com is our
official website for online business.
Laser distance sensor SKD-40D is a new kind of our laser distance measuring
instrument. It is characterized by high accuracy, long detection range, fast
measuring speed and competitive cost. The product has been widely used in
many fields including robot& drones positioning, tunnel & elevator detection and
other industrial applications.

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2. Features
❶ Long detection range (0.2 to 40m)
❷ High measuring accuracy (typical precision: ±2mm)
❸ Fast to install
Using 8 screws can be quickly and firmly installed
❹ Easy to operating
Automatic measurement by simple commands from computer
❺ Safety in use
Laser class 2, harmless to the human body (avoid direct eye exposure)
❻ Kinds of output type
RS232/485/TTL serial data output
4~20mA/0~5V/0~10V analog current/voltage output
Two-way switch output based on thresholds set by users
❼ Long-life and high reliability with good protection
High waterproof and dustproof performance with aircraft grade
aluminum alloy shell (the highest level is IP67)
❽ Fully customized service based on 15+ years industry experience
3. Specifications
Laser Distance Sensor
SKD-40D(RS232)
Measuring Range
0.2m to 40m①
Measuring accuracy
typ:±2mm
Smallest unit displayed
1mm
Laser class
2
Laser type
635nm,＜1mW
Laser beam diameter approx.
-at 10m distance
-at 50m distance
6mm
30mm
Measuring mode
-trigger measuring
-continuous measuring
yes
yes

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Operation mode
commands by computer
Output mode
RS232 serial digital output
Power supply
DC 9~24V/1A
Power consumption
＜3W
Temperature range
-storage
-operating
-25℃to 70℃
-10℃to 50℃②
Dimension
110.8*50*40mm③
Weight
210g
①Use a target plate to increase the measurement range during daylight or if the target
has poor reflection properties.
②The highest operating temperature is 40℃when sensor works in continuous measuring
mode. The operating temperature from -30℃to 50℃or -30℃to 70℃can be customized
③The details of dimension are shown in the following image.
A：Top view B：Back view C：Front view

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4. Using Instructions
4.1 Definitions of connectioncable
Red line —— VCC
Black line —— PGND
Yellow line —— TX
Green line —— RX
White line —— Signal GND
4.2 Operating Steps
4.2.1 Connect sensor to a serial port of computer (or other device
which has serial ports), then connect to a power port of adapter with special data
cable.
4.2.2 Single Measuring Mode
4.2.2.1 Send a command “O” (ASCII) by computer to turn on the sensor.
Then sensor will emit a laser beam and prepare for working, and return the data
“ - - - ” (ASCII) to the serial interface.
4.2.2.2 Send a command “O” (ASCII) again to the sensor to start to
measure distance. The sensor will return the measured data like “ XXXXX” (ASCII)
to the serial interface and turn off laser beam when it finished a single
measurement.
4.2.2.3 Send a command “U” (ASCII) to turn off the sensor.
4.2.3 Continuous Measuring Mode
4.2.3.1 Send a command “O” (ASCII) by computer to turn on the sensor.
Then the sensor will turn on the laser and prepare for working, return the data
“ - - -” (ASCII)to the serial interface.
4.2.3.2 Send a command “C” (ASCII) to the sensor. The sensor will begin
to measure continuously after 2 seconds when it got the order, and return the
data continuously like “ XXXXX” (ASCII).
If the sensor couldn’t get any available data, it will return “ - - -” to the
serial interface.
4.2.3.3 Send a command “U” (ASCII) to turn off the whole sensor
(include both of laser unit and measuring unit).

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5. Inputs and Outputs
5.1 Communication Setting
Baud rate: 9600 bps, Parity bit: None, Data bits: 8, Stop bit:1
5.2 Input data format
There is only one byte in each input data pack. Users could send different
commands to the sensor for different purpose, the functions of command are
shown in the following table.
HEX
0X4F
0X43
0X55
ASCII(Capital
letter)
O
C
U
Functions of
command
Power On &
Trigger Measuring
Continuous
Measuring
Power Off
5.3 Output data format
Digital output data is displayed by ASCII code, there is 7 bytes in every data frame.
The frame header is 0XFF, the next bytes meant measured distance numbers (unit:
mm). A: hundreds of thousands, B: tens of thousands, C: thousands, D: hundreds,
E: tens, F: ones.(Notice: If any byte in a data frame is not used, the sensor will
return 0X20 in that byte.)
Header
A
B
C
D
E
F
0XFF
hundreds of
thousands
tens of
thousands
thousands
hundred
s
tens
ones
The mapping table of HEX and number codes:
HEX
0X30
0X31
0X32
0X33
0X34
。。。
0X37
0X38
0X39
0x2D
0X20
number
0
1
2
3
4
。。。
7
8
9
-
space
For example, if the measured distance data is 3456mm, then the sensor willreturn
data as" 3456"(HEX: FF 20 20 33 34 35 36).
Or the measured distance data is 123456mm, then the sensor will return data as
"123456"(HEX: FF 31 32 33 34 35 36).
If the sensor couldn’t get any available data( out of measurement range or
measured in blind zone), it will return “ - - - -”(HEX:FF 20 2D 2D 2D 2D 20) to
the computer.

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6. Troubleshooting
6.1 Factors affecting the measurement range
Laser distance sensor is a new of non-contact optical measuring equipment. Its
measuring range and accuracy will be effect by many external environmental
factors. So actual measuring result might be different with typical value which is
measured in standard environment.
The following factors will effect actual measuring range:
Effect Factors
Increase measuring range
Decrease measuring range
Surface of
target
Bright and smooth surface with
good reflection, like target plate
Deep color and rough surface,
like green or blue target surface
Air visibility
Clean air
Dust, fog, storm and rain, snow
Ambient light
Dark environment
Target exposure to strong light,
like sunlight in midday
Laser emission
Laser emission lens and
protection glass keep clean and
smooth
Laser emission lens and
protection glass get dirty or
scratched
In conclusion, the best measuring result will be happen in a dark environment
and with a good reflection target. We strongly suggest to use a target plate when
laser distance sensor works in a poor environment.
We also suggest to keep laser emission lens and protection glass clean with a soft
cloth before start to using.

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6.2 Error code display
All of error codes are displayed as “E 2XX”(HEX: FF 45 20 XX XX XX).
The following errors can be corrected.
Display Notice
Cause
Correction
E 204(FF 4520 32 30 34)
Calculation error
Repeat procedure
E 252(FF 4520 32 3532)
Temperature too high
Let device cool down
E 253(FF 4520 32 3533)
Temperature too low
Warm device up
E 255(FF 4520 32 3535)
Received signal too weak,
time for a measurement
too long.
Use a target plate
E 256(FF 4520 32 3536)
Received signal too strong
Use target plate(gray side)
E 257(FF 4520 32 3537)
Faulty measurement, too
much background light
Use target plate(brown
side)
E 258(FF 4520 32 3538)
Outside of the range of
measurement
Select measurement
distance within the range
of measurement
E 260(FF 4520 32 3630)
Laser beam interrupted
Repeat the measurement

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7. Contact Us
Xi’an SANK Optical Electronic CO., LTD.
Tel: [phone]
Fax: [phone]
Mobi: 86-15353715490 Mr. Yang
E-mail: [e-mail]
Add:No.299, Jinhua North Road, Xi'an, China
Getting more info & supports from http://www.top1sensor.com