ZKTeco SLK20S User manual

Thank you for choosing our product. Please read the instructions carefully
before operation. Follow these instructions to ensure that the product is
functioning properly. The images shown in this manual are for illustrative
purposes only.
For fur the r d eta i ls, ple ase vi s it our Co mpany ’s we b site
www.zkteco.com.
User Manual
SLK20S
Date: July 2022
Doc Version: 1.1
English

Preface
Thank you for choosing our product SLK20S Embedded Optical Fingerprint
Module. Please read this User Manual carefully before use.
We strongly believe that Embedded Optical Fingerprint Module brings you
and your customers an excellent user experience and will uplift your Brand
Image and the Management to a higher level.
Considering the stability of the product quality and service life, please do
not intentionally dismantle the product or modify the system settings
without professional instructions. For further queries, please contact the
local dealers.

Content
1. Overview.........................................................................................................................1
2. Application Scenarios.................................................................................................2
3. Features...........................................................................................................................3
4. Specifications and Pin Descriptions.....................................................................4
5. Technical Parameters.................................................................................................5
6. Installation on Host (Devices) ................................................................................7
7. Demo Testing Procedure...........................................................................................8
8. Operating Instructions............................................................................................13

Overview
1.
1
SLK20S is a high-performance optical fingerprint module designed based
on Linux. It's embedded in 2-megapixel CMOS, and in addition to its ultra-
thin 16mm thickness, it can capture the best fingerprint images of all finger
types.
SLK20S adopts an advanced 1GHz CPU and ZKFinger V15.0 algorithm to
support the world's fastest fingerprint verification. It uses ISO19794-2
template format, can safely and quickly complete 1:1 verification. SLK20S is
the best solution for personal verification.
It provides a complete SDK, supporting the secondary development
integration of Windows, Android and Linux systems and fulfilling a variety
of adaptation scenarios, such as time & attendance, access control, self-
service terminals and other equipment requiring identity authentication.

Bank Public Security Bureau Education Logistics
Medical Traffic Prison Access Control
2
Application Scenarios
2.
Note: This Fingerprint Acquisition Module can be integrated into POS machines,
Access Control terminals and Time Attendance terminals, etc.

Features
3.
3
Light and compact size (thickness of the sensor is only 16mm)
Built-in ZKFinger V15.0 algorithm with license
Stable operation under strong light source
Embedded 2-megapixel CMOS, providing clear and high-quality
fingerprint images
Developed based on the Linux operating system, stable and excellent
security performance

4
4 5
USB
D-
USB
D+
PIN 1
+5v GND
23
Shield
6 7
UART UART
Detail
Specifications and Pin Descriptions
4.
Connector Pin 1
Fingerprint Sensor
LED Indicator
Unit: mm
44.25±0.2
36.25±0.2
15.96±0.2

ZKFinger V15.0
ISO 19794-2
Supported Algorithm
Template
Fingerprint Liveness Detection
Technical Parameters
5.
5
Hardware
Sensor
Accuracy
Image
1.72 * 1.4 * 0.6 inch/44.68 * 35.56 * 15.24mm
Dimensions( L * W * H)
0.6 * 0.8 inch/15.24 * 20.32 mm
Capture Dimensions ( W * H )
1.0 GHz, MIPS, FPU, SIMD
CPU
<1%
FRR (False Rejection Rate)
<0.0001%
FAR (False Acceptance Rate)
<1%
Distortion Rate
500 DPI
Image Resolution
300 * 400 pixels
Image Size
2-megapixel CMOS
Image Quality
<2KB
Template Size
Windows 7 or later version;
Android 5.1 or later version;
Linux
Operating Systems
YES
Encrypted Fingerprint Data YES
Sunlight Operation Yes
YES
Water Splash Proof
Matching Speed 110ms (1:1); 937ms (1:10,000)
General

Certified By
Power Consumption 5V, 130mA (Active) /5V, 70mA (Standby)
-10°C to 55°C / 14°F to 131°F
Operating Temperature
20 to 90% RH (non-condensing)
Operating Humidity
CE, FCC, RoHS
Interface USB2.0
UART (115200bps / T TL 3.3V )
Connector Molex 51021-0700(7-way;1.25mm)
6
General

Install the module on the device, as shown below, by tightening the four
screws in the holes and linking the holder to the wire.
Installation on Host (Devices)
6.
7
Note: In order to ensure good and convenient fingerprint scanning, it is
recommended to install the module on the wall horizontally or at an angle
of 0-45 degrees.

Demo Testing Procedure
7.
8
It is required that the first time Users need to install the Device Driver
before using the Fingerprint Scanner, and the process is as follows: (If the
Users have already installed the Device Driver of SLK ID series Fingerprint
Scanner, they can directly test without re-installing it.)
Download the Fingerprint Acquisition Module Driver file and then
double-click the setup.exe file to open.
1)

2) On the Setup Wizard, click Next and then click Install to install the driver.
9

3) After the completion of the Driver installation click Finish.
10
On the Fingerprint Acquisition Module Driver file, double-click the
demo file.
4)

5) On the demofolder, double-click the Debug file to go to the folder.
11
On the Debug folder, double-click the ZKFPModule.exe to go to the
Fingerprint Acquisition Interface. ZKFPModule.exe desktop shortcut
can also be created to instantly open the Fingerprint Acquisition
Interface.
6)
Click Connect to connect to SLK20S.

12
After connecting to SLK20S, on the UserID field, enter the required
User ID to register fingerprint, and then click Register.
Press the finger for three times on the Sensor area for Registration.
After successful Registration, click Identify, and then press the
registered finger on the Sensor area for verification.
7)

13
Operating Instructions
8.
Guide to Place the Finger
1. Proper Positioning of Finger
2. Improper Positioning of Finger
It is advised to use the index finger, middle finger or the little finger for
Registration.
Note: The finger needs to be pressed flatly
over the Sensor area, and make sure the
finger is placed exactly on the Sensor area.
Not the center
of the sensor
Not the core of
the fingerprint
Not the core of
the fingerprint
Not the center
of the sensor

14
4.
Make sure the fingers are clean when using the Fingerprint Scanner.
1.
Recommended to use the index, middle or little fingers for Registration.
3.
Place the finger correctly.
2.
Cautions
Suggestion
1.
Please make sure the Sensor area is clean after each use.
4.
Please use a wool-free cloth to wipe the Sensor area.
3.
Please use adhesive tape to clean the Sensor area.
2.
Do not use water or other detergents, which may damage the sensor.
Please avoid using the thumb and pinky fingers, because these two are
clumsy when pressing on the Sensor Area.
Please keep the sensor away from dust.
Possible Complications
Some issues may cause difficulties to recognize the Registered fingers or
during new Registration. They are:
Smoothed out fingers.
1.
Layer of any material on fingers.
3.
Too many wrinkles on fingers.
2.
Extremely dry and wet fingers.
4.

15
Solutions:
1.
2.
Always try to maximize the Contact Area of the finger.
3.
ZKTeco suggests registering alternative Fingerprints.
4.
5.
If the user experiences any difficulty during Registration, they can either
delete the fingerprint and re-register or can try using any other fingers.
It is recommended to choose the suitable finger with fewer wrinkles, no
peeling, and clean finger for Registration.
Soaked alcohol cotton is used for cleansing if the fingers are dry, and a
clean napkin is used for cleansing if the fingers are wet.

4.
There shall be no illegal arrest, detention, search, or infringement of persons;
1.
Personal dignity as related to personal freedom shall not be infringed upon;
2.
3. A citizen's house may not be infringed upon;
All of our civilian fingerprint recognition devices capture characteristics, not fingerprint images,
and do not involve privacy protection.
1.
4.
3.
2.
The law includes the following provisions on the personal freedoms of its citizens:
Dear Customers:
We Declare That:
Note:
Thank you for choosing this hybrid biometric recognition product, which was designed and
manufactured by ZKTeco. As a world-renowned provider of core biometric recognition technologies,
we are constantly developing and researching new products, and strive to follow the privacy laws of
each country where our products are sold.
16
Statement on the Right to Privacy
As a final point we would like to further emphasize that biometric recognition is an advanced
technology that will undoubtedly be used in e-commerce, banking, insurance, legal, and other
sectors in the future. Every year the world is subjected to major losses due to simple combination of
passwords. Biometric products serve to protect your identity in high-security environments.
A citizen's right to communication and the confidentiality of that communication is protected
by law.
If you would like to dispute human rights or privacy issues concerning your use of our product,
please directly contact your employer.
As the provider of this device, we will assume no direct or indirect responsibility for any
consequences that may result from your use of this device.
None of the fingerprint characteristics that we capture can be used to reconstruct an image of
the original fingerprint, and do not involve privacy protection.
Our other product fingerprinting devices or development tools can capture original images of
citizens' fingerprints. As to whether or not this constitutes infringement of your rights, please
contact your government or the final supplier of the device. As the manufacturers of the device, we
will assume no legal liability.

ZKTeco Industrial Park, No. 32, Industrial Road,
Tangxia Town, Dongguan, China.
Phone : +86 769 - 82109991
Fax : +86 755 - 89602394
www.zkteco.com
Copyright © 2022 ZKTECO CO., LTD. All Rights Reserved.