MSO Fingerprint scanners Installation Guide
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2018_2000039830
October 2021
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8. Man Machine Interface
8.1 MSO3xx Man Machine Interface
8.1.1 Description
In addition to the sensor light, there are two LEDs to provide information to the user:
when the sensor light is on, it usually means that the device is waiting for the user to
place a finger on the sensor,
the upper led is mainly used for smart card reader status (MSO35x only),
the lower led is mainly used for biometric process status.
The tables below describe the meaning of the light signals.
8.1.2 Biometric terminal status
Status
Sensor
Lower LED
Upper LED
Suspend (low power mode)
Off
Off
Off
Stand By (wait for a request)
Off
Flashing Green
See
Maintenance State (such as
firmware update in progress)
Off
Blinking Red
Blinking Red
Personalization State (secure MSO)
Off
Blinking Red
Blinking Red
Unrecoverable Error or USB
enumeration Error (see note)
Off
Red
Red
Table 14: MSO3xx status
NOTE: Both LEDs are red from successful power-up until the USB device is successfully
enumerated by the host system (usually a few seconds).
8.1.3 Biometric process status
Status
Sensor
Lower LED
Waiting For Finger
On
Off
Waiting For Finger Removal
On
Green
Finger Misplaced Or Latent
On
Blinking Red
Switch To Next Finger (enroll process)
On
Blinking Green
Recognized Finger
Off
2 seconds in Green
Finger Unknown / Failure
Off
2 seconds in Red
Table 15: MSO3xx biometric process status