B&B Electronics 485SD9TB
Contents
1. P 9145_ 485SD9TB 081 2 2 2 ca 7 O a O st zome C 2 c C L a don O gt gt ri Go ee a s ee lt T oO A L ie ZEN C z lt ra fy Ci oe ee Le x ema x g LJ NA yr Dea me st ae Sy Q D N L lt N 2 2 ee MFG A NY gt lt oD l V a 9 of N ie eS ae ON L LJ Pee a gt O 3 O I O A at A L S N Wo 4 Ss ON iy N QI a gt NE SPR gt s FA a a S i l tok 5 gy Lid O Sy Ah LO Z Q lt t wo 4 O ie B x vo fe o f N O i Z EA Y iN ic 5 YyG O q ie MJ OF O N Q Se LO DECLARATION OF CONFORMITY Manufacturer s Name Manufacturer s Address Model Number Description Type Application of Council Directive Standards B amp B Electronics Manufacturing Company P O Box 1040 707 Dayton Road Ottawa IL 61350 USA 485SD9TB Port Powered RS 485 Converter Light industrial ITE equipment 89 336 EEC EN 55022 EN 61000 6 1 EN 61000 4 2 4 3 4 4 4 5 4 6 4 8 4 11 PRODUCT INFORMATION Robert M Paratore Director of Engineering B B amp B ELECTRONICS www bb elec com orders bb elec com support bb elec co2. B amp B ELECTRONICS PRODUCT INFORMATION P 9145_ 485SD9TB 0812 1 2 Model 485SD9TB Port Powered RS 485 Converter CE The 485SD9TB is a port powered two channel RS 232 to RS 485 converter It converts the 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 An external power supply can be connected to two terminals on the RS 485 connector if no handshake lines are available The 485SD9TB has a DB 9 female connector on the RS 232 side and a terminal block connector on the RS 485 side RS 232 Side Connector DB 9 Female Signals Passes through pins 3 TD and 2 RD Pins 7 RTS and 8 CTS are tied together Pins 4 DTR 6 DSR and 1 CD are tied together RS 485 Side Connector Terminal Block Signals Half duplex two wire operation only Automatic control circuit enables driver only when transmitting Receiver is disabled when transmitting to prevent echo back to RS 232 device Can transmit up to 4000 feet at 115 2k baud Power Requirements No external power required if two RS 232 output handshake lines are available External 12VDC can be applied to pins on the RS 485 side between terminals 12VDC and GND if handshake lines are not available 35mA current draw maximum under normal operation when externally powered NOTE When using an external supply the supply should be connected only to specifically labeled power i
3. m International Office 707 Dayton Road PO Box 1040 Ottawa IL 61350 USA 815 433 5100 Fax 433 5104 European Office Westlink Commercial Park Oranmore Co Galway Ireland 353 91 792444 Fax 353 91 792445
4. nputs power jack terminal block etc Connecting an external power supply to the handshake lines may damage the unit Contact technical support for more information on connecting an external power supply to the handshake lines Dimensions 3 50 x 1 34 x 67 in 8 9 x 3 4 x 1 7 cm Although the 485SD9TB uses handshake lines to power the converter no handshaking is required to control the RS 485 driver The RS 485 driver is automatically enabled during each spacing state on the RS 232 side During the marking or idle state the RS 485 driver is disabled and the data lines are held in the marking state by the 4 7K ohm pull up and pull down resistors The value of these resistors may need to be changed to a different value when termination is used in order to maintain the proper DC bias during the idle state See B amp B Electronics RS 422 RS 485 Application Note for more information on termination and DC biasing of an RS 485 network The 485SD9TB has an internal connection to prevent data transmitted from the RS 232 port from being echoed back to the RS 232 port The 485SD9TB is used as a two wire half duplex RS 485 converter B www bb elec com orders bb elec com support bb elec com International Office 707 Dayton Road PO Box 1040 Ottawa IL 61350 USA 815 433 5100 Fax 433 5104 BEB ELEC TRONICS European Office Westlink Commercial Park Oranmore Co Galway Ireland 353 91 792444 Fax 353 91 792445 B amp B ELECTRONICS
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