Accessories

The RS-232 to RS-485 Converter converts unbalanced, full-duplex RS-232 signals to balanced full-duplex (4-wire), or half-duplex (2-wire) RS-485 signals. RS-485 is an enhanced version of the RS-422 balanced line standard.

The RS-232 port has a female DB25S type of connector with pins 2 (TD input) and 3(RD output) supported. Protective Ground (pin 1) and Signal Ground (pin 7) are also passed through. Pins 4(RTS) and 5(CTS) are tied together. Also pins 6(DSR), 8(CD), and 20(DTR) are tied together, but not passed through the converter. The RS-485 port has a male DB25P type of connector with the Send Data outputs on pins 2 and 14, and Receive Data inputs on pins 3 and 16 or 5 and 17.

Wide temperature and power ranges make B&B Electronics isolated converters ideal for your harsh duty applications. Automatic Send Data Control, Modbus compatible. The RS-232 side has both a terminal block connector and a DB9 female connector; the RS-485 side has a terminal block. Requires external power supply not included.

These port-powered RS-232 to 422/485 converters change TD and RD RS-232 lines to 422/485 signals. All of our serial port converters feature Automatic Send Data Control. SDC automatically enables the RS-485 driver when data is present on the RS-232 side. Control of the driver is automatic at rates up to 115.2 kbps.

• Connect RS-485 Devices to your USB Port
• Perfect for Field Service Applications
• Small - Fits easily into any laptop bag
• USB Port Powered
• USB 2.0 (12 Mbps) Compatible
• RS-485 Data rates up to 921.6 Kbps
• Supports Windows 98, ME, 2000, XP, Vista & 7