Advantech BB-485COSR
RS-232 to RS-485 Converter - DB25F to DB25M
- Extend RS-232 data signals up to 1.2 km (4,000 ft.)
- Change RS-232 TD and RD to balanced RS-485 signals
- Baud rates up to 115.2 kbps
- 2-wire or 4-wire, full-duplex operation
Model 485COSR, RS-232 to RS-485 converter, converts unbalanced, full-duplex RS232 signals to balanced full-duplex (4-wire) or half-duplex (2-wire) RS-485 signals.
The RS-232 port has a female DB25S 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. 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 connector with Send Data outputs on pins 2 and 14, and Receive Data inputs on pins 3 and 16, or 5 and 17. No special software requirements are needed since the RS-485 driver is enabled by the first transition on the RS-232 side of the Transmit Data line (Pin 2). Any transmission on the TD line keeps the RS-485 driver enabled by preventing the monostable multivibrator from timing out. The transmitter is disabled approximately 1 ms after the last transmitted character. This 1 ms timeout allows continuous transmission of data at 9600 baud or higher.
The RS-232 port has a female DB25S 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. 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 connector with Send Data outputs on pins 2 and 14, and Receive Data inputs on pins 3 and 16, or 5 and 17. No special software requirements are needed since the RS-485 driver is enabled by the first transition on the RS-232 side of the Transmit Data line (Pin 2). Any transmission on the TD line keeps the RS-485 driver enabled by preventing the monostable multivibrator from timing out. The transmitter is disabled approximately 1 ms after the last transmitted character. This 1 ms timeout allows continuous transmission of data at 9600 baud or higher.
SPECIFICATIONS
SERIAL TECHNOLOGY | |
Data Rate | 115.2 kbps maximum |
RS-232 Connector | DB25 female |
RS-485 Connector | DB25 male |
Signals | Converts RS-232 to RS-485 |
Operation | 2-wire half-duplex or 4-wire full-duplex |
Biasing Resistors | 4.7k Ohms |
Termination | None |
POWER | |
Power Requirement | 12VDC external power supply (sold separately) |
MECHANICAL | |
Dimensions | 5.4 x 6.2 x 1.5 cm (2.1 x 2.4 x 0.6 in) |
ENVIRONMENTAL | |
Operating Temperature | 0 to +70 °C (+32 to +158 °F) |
Storage Temperature | -40 to +85 °C (-40 to +185 °F) |
Operating Humidity | 0 to 95% non-condensing |
APPROVALS / CERTIFICATIONS | |
FCC | |
CE | |
2014/30/EU | Electromagnetic Compatibility Directive |
2011/65/EU | Reduction of Hazardous Substances Directive (RoHS) |
2012/18/EU | Waste Electrical and Electronic Equipment (WEEE) |
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