BB-485COSR RS-232 to RS-485 Serial Converter Features Converts RS-232 TD and RD to balanced RS-485 Extend RS-232 data signals up to 1.2 km (4000 ft) Data rate: up to 115.2 kbps baud Quick, inline installation Automatic send data control no software needed 12 Vdc power supply required (not included, sold separately) Introduction Ordering Information Model BB-485COSR converts unbalanced, full-duplex RS-232 signals to balanced full- Model No. RS-232 RS-485 Output duplex (4-wire) or half-duplex (2-wire) RS-485 signals. RS-485 4-wire full-duplex or BB-485COSR DB25 Female DB25 Male RS-485 2-wire half-duplex 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 Accessories Sold Separately together, but not passed through the converter. BB-SMI6B12V-P230C1 Power Supply, 12 Vdc, 6 W, 2.5mm plug, international AC input, international AC blades (NATAM, EU, UK, Australia, China) 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 is 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. A 12 Vdc external power supply is required (not included, sold separately). Interconnection Diagram Table 1. Component Replacements for Changing Baud Rate Timeouts Resistor (R6) Capacitor (C7) Baud Rate Time (ms) (Ohms) (mfd) 300 33.3 330K 0.1 600 16.6 160K 0.1 1200 8.33 820K 0.01 2400 4.16 430K 0.01 4800 2.08 200K 0.01 9600 1.04 100K 0.01 19200 .520 56K 0.01 38400 0.260 27K 0.01 57600 0.176 16K 0.01 115200 0.0868 8.2K 0.01 BB-USOPTL4-2P BB-USOPTL4-4P 0221ds All product specifications are subject to change without notice. BB-485COSR 1921dsBB-485COSR Specifications Serial Technology Regulatory Approvals / Standards / Directives Data Rate 115.2 Kbps, maximum FCC, CE 2014/30/EU Electromagnetic Compatibility Directive (ECD) RS-232 Connector DB25 female 2011-65/EU Amended by (EU) 2015/863 Reduction of Hazardous RS-422 Connector DB25 male CE Directives Substances Directive (RoHS) Signals Converts RS-232 to RS-485 2012/19/EU Waste Electrical and Electronic Equipment (WEEE) Operation 2-wire half-duplex or 4-wire full-duplex EN 55032 Class B Electromagnetic Compatibility of Multimedia Biasing Resistors 4.7 Ohms Equipment Emission Requirments CE Standards EN 55024 - Information Technology Equipment - Immuity Characteristics Termination None Limits and Methods of Measurement Power EN 61000-6-3 + A1 Generic Emission Standard for Residential, 12 Vdc, external power supply Other Standards Commercial and Light-industrial Environments (Class B) Source / Requirement (required, not included, sold separately) EN 61000-6-2 Generic Immunity Standard for Industrial Environments 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 0-95%, non-condensing Schematic