User Manual

Appendix A Technical Specifications
RFI-9256 Radio Modem User Manual Page 52 of 96
A.3 Connector Pin Assignments
Pin Function
1 +12V input
2 Transmit data out (TXD) main port
3 Receive data in (RXD) main port
4 Transmit data out (TXD) auxiliary port
5 Receive data in (RXD) auxiliary port
6 I/O control 7
7 I/O control 5
8 I/O control 0
9 I/O control 2
10 Synchronisation I/O
11 NC
12 NC
13 GND
14 +12V input
15 CTS output (main port)
16 RTS input (main port)
17 DCD output (main port)
18 DTR input (main port)
19 I/O control 6
20 I/O control 4
21 I/O control 1
22 I/O control 3
23 NC
24 NC
25 GND
Table 19: RFI-9256 DB25 Pin Assignments