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GROW K202+R502-A DC12V Low Power Consumption Fingerprint Access Control Board+R502-A Small Ring LED Fingerprint Module

  • 1-9 Pieces
  • >=10 Pieces
Fingerprint Access Control
- +
Fingerprint Control Board
- +
0piecesselected, US $in total
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Depends on the order quantity.
Lead Time:
7 day(s) after payment received
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Quick Details
Place of Origin:
China, CN;ZHE
Brand Name:
Model Number:
Product name:
K202+R502-A Fingerprint control board
Power supply:
DC 12V
Fingerprint capacity:
Standby current:
Relay(Max. current: 10A)
K202 Size:
R502-A Size:
Diameter 22mm
Special Features:
Access Control

Packaging & Delivery

Selling Units:
Single item
Single package size: 
13X8X9 cm
Single gross weight:
0.150 kg
Package Type:
Standard Export Carton Package
Lead Time :
Quantity(Pieces) 1 - 50 >50
Est. Time(days) 7 To be negotiated


Product Description


K202 Technical Parameters

·P1: Power supply: DC12V
·Output: Relay(Max. current:10A)
·Standby current: 15uA
·Fingerprint capacity: 120 pieces
·Size: 64.4*25.4mm
·P2: MX 1.0mm space 6 Pin Fingerprint Module(can connect R502,R502-A,R503)
·P3: MX 1.25mm space 6 Pin Fingerprint Module(can connect R300,R301T,R303,R303T,R305,R306,R307,R501)



K202 is designed for low power consumption, the power supply is DC12V, the relay time can be adjusted by rotating the button, relay time: 0.5-13 seconds.
It is very easy to register fingerprint, just need to press SET button to register fingerprint and long press SET button to back to factory default.


K202 Operation Instruction

1.SET Button:
Press SET button shortly,blue indicator light flash fast and system in register state, put the finger on fingerprint collection area, fingerprint register successful when hearing music. Fingerprint can be registered continuously when system in register state; if no need adding fingerprint more, waiting a few seconds.
2.Back to factory default:
Press SET button until hear “Di” long beep and music,means initialization operation successful.
3.Set Relay Time:
Rotate K2 to set the closing time of the relay from 0.5 to 13 seconds. The relay is contact output, switch signal, no voltage output.
Press the finger,the relay closes after the fingerprint passes, and the closing time is determined by K2.  
Note: 1. All indicator lights are off in standby state, and the lights are on in working state;
2. Any fingerprint can be used in the factory state, but the function will be invalid after the fingerprint is registered. 
K202 can be used together with R300,R301T,R303,R303T,R305,R306,R307,R501,R502,R502-A,R503 fingerprint module




R502-A Specifications

Model R502-A
Type Capacitive Fingerprint Module
Interface UART(TTL)
Resolution 508 DPI
Voltage DC 3.3V
Fingerprint Capacity 200
Sensing array 192*192 pixel
Working current 20mA
Standby current Typical touch standby voltage: 3.3V, Average current: 2uA
Fingerprint module external size Diameter 22 (mm)
Fingerprint module inner size Diameter 19.3 (mm)
Fingerprint module height 5 (mm)(Except the connector)
Effective collection area Diameter 15.5 (mm)
Connector MX1.0-6Pin
LED Control YES
LED Color Purple and Blue and Red
Scanning Speed < 0.2 second
Verification Speed < 0.3 second
Matching Method 1:1; 1:N
FRR ≤1%
FAR ≤0.001%
Work environment -20C ---60C
Work Humidity 10-85%
Anti-static capacity 15KV
Abrasive resistance intensity 1 million times
Communications baud rate (UART): (9600 × N) bps where N = 1 ~ 12(default N = 6, ie 57600bps)



·All fingerprint module support with Arduino, Android, Windows, Linux, .Net and so on. 
·Provide Free SDK Files
·Provide User Manual 

You can download the R502-A user manual from this website link:
You can dowload the K202 user manual from this website link: 
If need SDK files,pls contact us.





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