Document Title
Revision: B
SR272A; SR272B Hardware User Manual
DAR/T272D/DES/2032
10 of 12
5.
Operational Precautions
5.1.
General Safety Instructions
The SR272A; SR272B reader contains ESD sensitive components. When handling with the
boards, avoid in contact with components especially the ICs on the boards. The operating
voltage of the SR272A; SR272B reader is 12VDC. Operating the SR272A reader other than the
rated voltage will experience performance deterioration or damage the reader.
5.2.
Installation
The SR272A; SR272B Reader uses inductive coupling to communicate with contactless cards.
Therefore, the reader is highly sensitive to ferrous or non-ferrous metal alike. Installation near
to metal may affect operating distance. It is important to keep a comfortable distance away
these metal surfaces for optimum performance.
5.3.
Reader Status Indicators
There are 2 power LEDs indicators (one on Main board and one on SAM board). In addition,
there is a RGB status LED on the Main board.
The RGB status indicator provides the following status information.
Color
Status
WHITE
Powered up and ready for use.
RED/Blinking
Power-on-Self-Test (POST) failed.
•
Power undersupply/over-supply.
•
NFC Reader board connection error.
•
SAM controller connection error.
•
Temperature sensor not responding or
over-heated.
GREEN
Application loaded, ready for operation.
YELLOW
Application-specific.
CYAN
BLUE
Programming in progress.
PURPLE
Programming completed, ready to restart.
