BB-422LCON RS-232 to RS-422 Converter Features Converts unbalanced RS-232 signals to balanced RS-422 signals Data rates up to 90 kbps Extends RS-232 line up to 1200 meters (4000 ft) RS-422 driver can drive ten RS-422 receivers in parallel (for use in multidrop systems) Power supply required (not included, sold separately) Introduction Ordering Information Model BB-422LCON, non-isolated serial converter, converts unbalanced RS-232 signals to Model No. Description RS-232 Connector RS-422 Connector balanced RS-422 signals. The RS-422 Standard uses a balanced voltage digital interface to allow communications of 90K bits per second on cable lengths of 1200 meters (4000 ft). BB-422LCON RS-232 to RS-422 Converter DB25 Male DB25 Female Ten receivers can be connected to any one driver for use in multi-drop systems. The RS-232 port is a male DB-25 connector with pins 2 (TD input) and 3 (RD output) Accessories Sold Separately supported. Protective Ground (pin 1) and Signal Ground (pin 7) are also connected. The RS- BB-SMI6B12V-P230C1 Power Supply, 12 Vdc 6 W, 2.5mm plug, International AC Input, 422 port uses a female DB-25 connector with the Send Data outputs on pins 2 and 14, and International AC Blades (NATAM, EU, UK, Australia, China) the Receive Data inputs on pins 5 and 17. Protective Ground (pin 1) and Signal Ground (pin 7) are connected through to the RS-232 connector. Interconnection of the converter with another RS-422 device: The polarity of the two RS-422 lines must be correct. With no data being sent, the RS-232 line should be negative and the RS-422 A terminal should be negative with respect to the B terminal. The RS-422 Standard wire recommended is number 24 AWG copper conductor, twisted- pair telephone cable with a shunt capacitance of 16 pF per foot. For long runs and/or high data rates, it is recommended that the wires be terminated with a resistor at the receive end. The twisted pair usually used has an impedance of about 100 Ohms, therefore a 100 Ohm resistor is normally used for the termination. The RS-422 side of the converter requires more power as the transmission line is increased and as the termination resistor value is reduced, therefore it may be necessary to use a termination resistor that is greater than 100 Ohms. The RS-422 driver has the ability to drive ten RS-422 receivers connected in parallel. A system of multiple receivers may require some experimentation with location and size of termination resistors, line lengths, grounding, etc. The RS-422 Standard recommends that Protective Ground (pin 1) be connected to a good green wire ground. This may be already connected in your RS-232 equipment. Protective Ground and Signal Ground should be connected through to each end of the system and be connected to each other using a 100 Ohm 0.5 Watt resistor at one end only. If a shielded twisted pair is used, the shield be connected to Protective Ground BB-USOPTL4-2P BB-USOPTL4-4P 0221ds All product specifications are subject to change without notice. BB-422LCON 1821dsBB-422LCON Specifications Serial Technology Regulatory Approvals / Standards / Directives RS-232 Connector DB25 male FCC, CE 2014/30/EU - Electromagnetic Compatibility Directive (ECD) RS-422 Connector DB25 female 2011-65/EU - amended by (EU) 2015/863 Reduction of Hazardous Data Rate Up to 90 Kbps baud CE - Directives Substances Directive (RoHS) Signals TD, RD 2012/19/EU - Waste Electrical and Electronic Equipment (WEEE) Power EN 55032 Class B - Electromagnetic Compatibility of Multimedia 12 Vdc 100 mA, external power source Equipment - Emission Requirments Power Requirement CE - Standards (not included, sold separately) EN 55024 Information Technology Equipment - Immunity Characteristics - Meantime Between Failures (MTBF) Limits and Methods of Measurement EN 61000-6-3 + A1 - Generic Emission Standard for Residential, MTBF 8888099 hours Other Standards Commercial & Light-industrial Environments (Class B) Calculation Method MIL 217F using Parts Count Reliability Prediction Method EN 61000-6-2 - Generic Immunity Standard for Industrial Environments Schematic