16
S&C Instruction Sheet 1075-510
Installation
Interface Pinouts
The SpeedNet SDR Radio serial ports have hardware to support RS 232, RS 422, and
RS 485. Table 7 shows the pin definitions for each:
Table 7. SpeedNet SDR Radio Interface Pinout
Pin
RS 232
RS 422
RS 485
1
DSR
2
DCD
3
DTR
4
GND
GND
GND
5
TXD
RX+
B+
6
RXD
TX+
B+
7
CTS
TX-
B-
8
RTS
RX-
B
The SpeedNet SDR Radio Ethernet interfaces use an RJ-45 connector with the pinout
shown in Table 8. The Ethernet port is on the rear panel of the SpeedNet SDR Radio. It is
auto-sensing for assignment of transmit and receive lines (no crossover cables required) and
auto-negotiates for a 10-Mbps or 100-Mbps data rate as required by the connected device.
Table 8. SpeedNet SDR Radio Ethernet RJ-45 Interface Pinout
1
8
Pin
Function
Description
1
TXD+
Transmit
2
TXD-
Transmit
3
RXD+
Receive
4
NC
No Connection
5
NC
No Connection
6
RXD-
Receive
7
NC
No Connection
8
NC
No Connection
1
8
