FreeWave Technologies Inc. 1521131FFF Manuale Utente

 Spread Spectrum Wireless Data Transceiver User Manual 

LUM0002AG Rev A 

Version 7.0 

53 

RX+ 7 

3 

RX- 9 

7 

TX+ 5 

2 

TX- 10  8 
Signal Ground 

4 or 6 

5 

Wire to both pins for Bus + 

Short 5 and 7 

Short 2 and 3 

Wire to both pins for Bus - 

Short 9 and 10 

Short 7 and 8 

Signal Ground 

4 or 6 

5 

RX+ 3 

Orange 

RX- 7 

Violet 

TX+ 2 

Red 

TX- 8 

Gray 

Signal Ground 

5 

Green 

1 

CD 

Carrier Detect 

Output 

Used to show an RF connection between transceivers. 

2 TX  Transmit 

Data 

Output Used to transmit data bits serially from the transceivers to the 

system device. 

3 RX  Receive 

Data 

Input  Used to receive data bits serially from the system device 

connected to the transceivers. 

4 

DTR 

Data Terminal Ready 

Input 

Used only in transceivers in Point-to-Point Slave/Master 
switchable mode or for DTR Connect.  

5 

GND 

Ground 

 

Signal return for all signal lines shared with Pin 9. 

6 

DSR 

Data Set Ready 

Output 

Always high when the radio is powered from the 2.5mm 
power connector. Indicated power is on to the radio. Also, 
this pin can be used for +12Volts when powering the 
transceivers directly through the RS-232 port. 

Note: This is not used on the OEM module. 

7 

RTS 

Request to Send 

Input 

The transceiver does not recognize RTS for flow control. RTS 
is used as a control line in RTS/CTS mode. 

8 

CTS 

Clear to Send 

Output 

This signal is used to tell the system device connected to the 
transceiver that the transceiver is ready to receive data. 
When asserted, the transceiver will accept data, when 
deasserted the transceiver will not accept data. This should 
always be used for data rates above 38.4KB or a risk of lost 
data may occur if an RF link is not very robust. 

9 

GND 

Ground 

 

Signal return for all signal lines shared with Pin 5.