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Help CenterSM628B Biometric Finger Print Reader Module for Door Access Control System With Fingerpint Scanner
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Specifications
Ultra Low power consumption 80mAsleeping and wakeup control interfaces
live finger print detection
prevent fake fingerprints
The basic concept in fingerprint system
The fingerprint features
The fingerprint algorithm extracts features from fingerprint image. The store, match and search of fingerprint is operated by means of fingerprint features.
1: 1 match
Two fingerprint features are compares with each other. The return message is either match or no.
1:N search
From N fingerprints, get one fingerprint out of N fingerprints to compare with 1 given fingerprint feature. The return message is: no match or match and returning match feature number.
Live finger validation
In SM-628B fingerprint module, the function of live finger validation is designed on order to prevent fake fingerprints. The live fingerprint validation has two phase as 0 and 1. 0 is off; 1 is on. However, this function is sensitive to environment temperature, humidity and wetness of the finger.
In order to increase the robust of the system, and to prevent the un-sensitivity with fingerprint detection, it is recommended to search fingerprints one more without the live fingerprint validation in the same time.
Technical parameters
No | Technical Items | Technical parameters | Test conditions |
1 | System power supply | 4.5V-7V(DC) |
|
2 | Normal working current | <80mA | 5V |
3 | Peak current | <100 mA | 5V |
4 | Fingerprint entry time | < 100ms |
|
5 | 1:1match time | < 400ms | Features extraction and fingerprint match |
6 | 1:256 search time | < 2s |
|
7 | Fingerprint storage quantity | 1024 (default) / 1776(customized) |
|
8 | FAR | < 0. 001 % |
|
9 | FRR | < 1.5 % |
|
10 | External interface | UART* |
|
11 | Module size | 53.0 x 20.5 x 24.5mm |
|
12 | Size of fingerprint template | 256bytes |
|
13 | Storage temperature | -40 degree to 85 degree |
|
14 | Working temperature | -20degree to 60 degree |
|
* 1bit start bit, 8 bits data bit, 1bit stop bit Baud rate 57600bps
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