RAD-ISM-900-EN-BD…
3-10
PHOENIX CONTACT
2476_en_I
RS-422/485 Connections
The radio can also be connected to external devices using RS-422 or RS-485. Both 2-wire
and 4-wire configurations are supported. Although the 4-wire configuration supports full
duplex communications, the radio is only half duplex over the air.
Figure 3-7
RS-422/485 2-wire and 4-wire connections
RAD-ISM-900-EN-BD
FLBL-2938-03R2
Transmit Receive
Power
RF Link
RAD-ISM-900-EN-BD
FLBL-2938-03R2
Transmit Receive
Power
RF Link
RXD (B-)
RXD (A+)
TXD (B-)
TXD (A+)
– +
RS-485 2-wire connection
RS-422 4-wire connection
RSPSupply - 1-888-532-2706 - www.RSPSupply.com
http://www.RSPSupply.com/p-12970-Phoenix-Contact-2900016-Radio-900-MHz-Ethernet-Radio.aspx