RS-232 to RS-485 Converter, Port-Powered (4000 ft)
Port-powered two-channel RS-232 to RS-485 converter. Converts TD/RD to half-duplex RS-485 with automatic driver control. Customer insight: None
Highlights
- port-powered two-channel conversion
- auto driver control
- RS-232 to RS-485 compatibility
Pros
- port-powered operation
- two-channel conversion
- half-duplex RS-485 support
- automatic driver enable/disable
- fits RS-232 to RS-485 needs
Cons
- pkgs only DB-9 female connectors
- distance spec 4000 ft stated
- no explicit compatibility details
Best For
Features
- The 485SD9R is a port-powered two-channel RS-232 to RS-485 converter. It converts TD and RD RS-232 lines to balanced half-duplex RS-485 signals. The unit is powered from the RS-232 data and handshake lines whether the lines are high or low.
- RS-232 SideConnector DB-9 femaleSignals Passes through pins 3 (TD) and 2 (RD)Pins 7 (RTS) and 8 (CTS) are tied togetherPins 4 (DTR)
- 6 (DSR)
- and 1 (CD) are tied together
- RS-485 SideConnector DB-9 femaleSignals 2 wire
- half-duplex operation onlyAutomatic control circuit enables driver only when transmittingReceiver is disabled when transmitting to prevent echo back to RS-232 device
- Data Rates Up to 115. 2 k baudDistance Depending on power from port; will transmit up to 4000 feet at 19,200 baudDimensions 2. 50 x 1. 30 x. 80 in
- Power Requirements No external power is required if two RS-232 output handshake lines are available. If the handshake lines are raised and no termination is used
