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ACR33U-A1 SmartDuo Reference Manual
Version 1.00
Page 7 of 56
www.acs.com.hk
5.0. Power Supply
The ACR33U-A1 SmartDuo requires a voltage of 5 VDC, 100 mA, regulated, power supply. The
ACR33U-A1 SmartDuo gets the power supply from PC (through the cable supplied along with each
type of reader).
5.1. Status LED
The LED indicates the activation status of the smart card interface:
•
Flashing slowly (turns on 200 ms every 2 seconds)
Indicates ACR33U-A1 SmartDuo is powered up and in the standby state. Either the smart
card has not been inserted or the smart card has not been powered up (if it is inserted).
•
Lighting up
Indicates power supply to the smart card is switched on, i.e., the smart card is activated.
•
Flashing quickly
Indicates there are communications between ACR33U-A1 SmartDuo and smart card.
The different LED colors indicate the different states of the ACR33U-A1 SmartDuo, where:
•
Red LED
Power status
•
Green LED
Main card slot status
•
Blue LED
Slave card slot status
