Data Sheet

RB-Dfr-389
RS232 To RS485 Converter
Introduction
This is a simple RS232 to RS485 converter that is self powered using the TX, RX or RTS, CTS signals
for power. The RS232 is DB9 female connector, and the RS422 side is a DB9 male or 4 position
terminal block.
It is able to convert RS232 signal to RS485 balanced differential signal and extend the communication
distance to 1.2km.
It is passive and doesn't require external power.
Specification
• Opto isolation
• Lighting & surge protectors
• Compatible withEIA/TIA RS232 Standard and RS485 Standard
• Working Mode:Asynchronous, Half-duplex, Differential Transmission
• Transmission Media:Twisted Pair or Shielded Twisted Pair
• Transmission Rate:300bps -115.2K bps
• Transmission Distance:1200m(RS485), 5m(RS232)
• Working Environment:25 -70 degree (Temperature) , 5% - 95% (Humidity)
• Dimension:3.25" x 1.25" x 0.6"(L * W * T)
• Net Weight: 36g
• CE/FCC/Rohs Compliant