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Computer connection
If your encoder is supplied with an USB interface, it will either be connected to the device’s internal USB Hub, or equipped with a USB cable to
connect to your computer directly.
In the first case, your device’s USB cable is used to drive firstly the device and secondly the encoder from the computer.
If your encoder is supplied with an RS-232 interface, it needs to be connected to the computer via a serial cable. This cable plugs into the
device’s female DB-9 socket, and into a COM port on the computer.
A sequence of commands must be sent via the device’s interface to insert a card in the device then position it close to the antenna to establish
radio communication between the card and the encoder.
The command sequence is as follows:
Sending the SIC sequence:
l
A card is moved from the feeder towards the antenna and is positioned nearby.
l
The chip is programmed via the computer’s serial (or USB) interface connecting the built-in encoder and the computer.
DB-9 connector pins
RS-232 signals (serial)
1
Not used
2
RxD
3
TxD
4
Not used
5
GND
6
Not used
7
RTS
8
CTS
9
Not used
B
