ZKTeco SLK21M 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
SLK21M
Date: July 2022
Doc Version: 1.0
English

Preface
Thank you for choosing our product SLK21M 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.
However, considering the stability of the product quality or modify the
system settings without professional instructions. For further queries, don't
hesitate to get in touch with 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) ................................................................................6
7. Demo Testing Procedure...........................................................................................7
8. Operating Instructions............................................................................................12

Overview
1.
1
SLK21M is an enhanced version of the SLK20M fingerprint module. It supports a
fingerprint acquisition module with a large capacity and a template storage
expansion function. As a result, its transmission performance is more stable,
and the fingerprint comparison speed is 4 times faster than SLK20M.
Integrating with the excellent fingerprint recognition algorithm, ZKFinger V10.0,
independently developed by ZKTeco, the product can quickly realize offline
extraction and comparison of fingerprint templates on the module, and support
fingerprint template comparison on the host.
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)
Local encrypted storage of 8,000 fingerprint templates
Offline fingerprint comparison available
Embedded 2-megapixel CMOS, providing clear and high-quality
fingerprint images
Developed based on the Linux operating system, stable and excellent
security performance
Fingerprint comparison speed is 4 times faster than SLK20M with the same
storage capacity

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

Technical Parameters
5.
5
USB 2.0
UART (115200bps/TTL 3.3V)
Interface Molex 51021-0700 (7 pin; 1.25mm)
Connector
Hardware
Sensor
Accuracy
Image
Certified By
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
<2KB
Template Size
ZKFinger V10.0
8,000 templates (max. 10,000)
110ms (1:1); 937ms (1:10,000)
Windows 7 or later version;
Android 5.1 or later version;
Linux
Supported Algorithm
Capacity
Matching Speed
Operating Systems
Power Consumption 5V, 130mA (Active) /5V, 70mA (Standby)
0°C to 45°C / 32°F to 113°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)
General
1.72 * 1.4 * 0.6 inch/44.68 * 35.56 * 15.24mm

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.
6
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.
7
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)