Owner's manual

User Manual and Reference Guide
LUM0024AB Rev A
Pin Assignment Signal Definition
1 DSR Data Set Ready Output Always high when the radio is powered from the
Phoenix power connector. Indicates power is on to the
transceiver.
2 CD Carrier Detect Output Used to show an RF connection between
transceivers.
3 DTR Data Terminal
Ready
Input Not used.
4 GND Ground Signal return for all signal lines.
5 RX Receive Data Input Used to receive data bits serially from the system
device connected to the transceiver.
6 TX Transmit Data Input Used to transmit data bits serially from the transceiver
to the system device.
7 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 accepts
data, when de-asserted the transceiver does not
accept data. This should always be used for data rates
above 38.4 KB or there is a risk of lost data if an RF
link is not very robust.
8 RTS Request to Send Input The transceiver does not recognize RTS for flow
control.
DB9 Connector Pin Assignments
Pin Assignment Signal Definition
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 2.5
mm power connector. Indicated power is on to the
radio. Also, this pin can be used for +12 Volts when
powering the transceivers directly through the RS232
port.
97