What is the pinout of the serial interface cable of your card reader (e.g. WCR3227-xxx)?
OmniReader Cable Pinout
Serial Interface Cable:
Pin #(Molex) Signal Pin#(DB9) Color(for Ref.) Note
1 Case Gnd Shell Drain (blue?)
2 Txd 2 White
3 Rxd 3 Green
4 Vcc Yellow to Receptacle Pin
5 RTS 8 Brown
6 CTS 7 Grey
7 Gnd 5 Black to Receptacle Sleeve Case Gnd
Revision F and revision G have the same wire connections. Here is the table for the pin-out.
Note: The color of the wires are for reference only, they can be changed by the cable manufacture.
Please always go by the pin # and signal name.