Appendix A — Specifications
IF2 Network Reader User’s Manual 85
Serial Ports (COM1)
24 12VDC
25 -Output 4 Low-RTN
GPIO Port Pin Assignments (continued)
Pin Description Active Polarity
Serial Port Pin Assignments
Pin Description Active Polarity
1NC
2 Receive data (RXD)
3 Transmit data (TXD)
4NC
5 Signal ground
6NC
7 Request to send (RTS) Low
8Clear to send (CTS)Low
9NC
Pin 1
Pin 9
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