Advanced Card Systems Limited ACR1281S Benutzerhandbuch
ACR1281S
Advanced Card Systems Ltd.
Page 12 of 56
HARDWARE DESCRIPTION
3. USB Interface
The ACR1281S is connected to a Host through the RS232 Serial Interface; the max speed is up to
500kbps.
Pin
Signal
Function
1
VCC
+5V power supply for the reader.
2
RXD
The signal from the reader to the host.
3
TXD
The signal from the host to the reader.
4
GND
Reference voltage level for power supply
4. LED Indicator
The LEDs are used for showing the state of the contact and contactless interfaces.The Red LED is
used for showing PICC status and Green LED for ICC.
used for showing PICC status and Green LED for ICC.
Reader States
Red LED
PICC Indicator
Green LED
ICC Indicator
1. No PICC Found or PICC present but not
activated.
A single pulse per
~ 5 seconds
2. PICC is present and activated
ON
3. PICC is operating
Blinking
4. ICC is present and activated
ON
5. ICC is absent or not activated
OFF
6. ICC is operating
Blinking