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veriCLASS Hardware Specification VP3500 Reader Board, 3500-906 
 
 
I/O 
The veriCLASS reader board offers four dedicated LED controls and one dedicated buzzer control 
line (open collector). The board itself already has all LED’s and the buzzer populated but the control 
lines are still available in through connector P105 in case the visual/audio interface needs to be 
placed off the board. 
Note: The onboard LEDs and buzzer are using the same signal lines provided by the connector. 
Table 11: UART Interface 
UART interface 
Function 
Signal Pin 
Description 
+5V 
Regulated 5VDC from the reader board 
LED1 
Control line LED1 
LED2 
Control line LED2 
LED3 
Control line LED3 
LED4 
Control line LED4 
Buzzer 
Control line for Buzzer (open collector) 
RFU 
Reserved for future use 
RFU 
Reserved for future use 
RFU 
Reserved for future use 
GND 10 
GND 
Table 12: I/O Connector 
UART interface 
Manufacturer Molex 
Series PicoBlade® 
Part Number 
053398 1071 
Maximum Current 
1A 
 
Example Picture only 
 
 
 
Page 24 of 28 
 
March 2011 
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