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RS-232

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485/422 CONVERTERS

Figure 3. Line Bias. S2 shows the line termination when

“Term” is selected. S3 shows line bias when “Bias” is selected.

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Summary of Contents for IC108A

Page 1: ...ss Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com APRIL 2002 IC108A IC109A IC108C IC109A R2 IC108AE IC109C IC109AE RS 232 485 422 Converter Plus RS 232 485 422 Opto Isolator Converter TX RX CD RTS PWR DCE DTE 232 485 422 OPTO ISOLATOR CONVERTER NORMAL DLB RX TX RTS CD TX RX CD RTS PWR RX TX RTS CD DCE DTE NORMAL DLB 232 485 422 CONVE...

Page 2: ... is operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be necessary to correct the interference Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment Th...

Page 3: ...l aparato eléctrico debe ser montado a la pared o al techo sólo como sea recomendado por el fabricante 8 Servicio El usuario no debe intentar dar servicio al equipo eléctrico más allá a lo descrito en las instrucciones de operación Todo otro servicio deberá ser referido a personal de servicio calificado 9 El aparato eléctrico debe ser situado de tal manera que su posición no interfiera su uso La c...

Page 4: ...r una antena externa deberá ser localizada lejos de las lineas de energia 16 El cable de corriente deberá ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo 17 Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orificios de ventilación 18 Servicio por personal calificado deberá ser provisto cuando A El cable de poder o ...

Page 5: ...4 RS 232 485 422 CONVERTERS TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners ...

Page 6: ... 1 3 Half Full Duplex Operation 9 3 1 4 CTS Delay 11 3 1 5 RS 485 Driver Enable 11 3 1 6 Half Duplex Turnaround Delay 12 3 1 7 RS 485 Interface Terminated or Unterminated 12 3 1 8 Normal Loopback Operation 13 3 1 9 RS 485 Interface Line Biased Fail Safe 13 3 2 DCE Configuration DTE Configuration 14 3 3 Typical Applications 22 Appendix A Pinning 28 Quick Reference User Selectable Options 30 ...

Page 7: ...umidity 0 to 95 relative humidity noncondensing MTBF Approximately 180 000 hours ground benign environment Power PS154 for use with IC108A IC109A Input 120 V 60 Hz 20W Output AC 17VCT 0 7A PS154E for use with IC108AE IC109AE Input 230 V 50 Hz 20W Output AC 17VCT 750 mA Size Standalone Unit 1 8 H x 5 5 W x 8 5 D 4 6 x 14 x 21 6 cm Rackmount Card 7 4 L x 4 7 W 18 8 x 11 9 cm 0 6 inches thick 1 6 cm ...

Page 8: ...pair Speed Distance 1200 bps 4 miles 6 4 km 2400 bps 3 miles 4 8 km 4800 bps 2 3 miles 3 7 km 9600 bps 1 7 miles 2 7 km 19 200 bps 1 2 miles 1 9 km 38 400 bps 0 9 mile 1 4 km 64 000 bps 0 75 mile 1 2 km 115 kbps 0 4 mile 0 6 km NOTE Speed and distances will depend on actual operating conditions ...

Page 9: ...mmunications and the difference in ground potential between buildings won t damage your sensitive equipment Additional features include a manual loopback test to check the system wiring for both the RS 232 and RS 485 interfaces and transient protection on the RS 485 interface to help prevent damage due to voltage transients on the data line Although designed specifically to connect to other RS 232...

Page 10: ...sts DTE jumper settings 3 1 1 DTE DCE CONFIGURATION A DIP shunt is used to select DTE or DCE configuration For the RS 232 485 422 Converter to appear as a DTE device put the DIP shunt jumper in socket XW1B For the RS 232 485 422 Converter to appear as a DCE device put the DIP shunt jumper in socket XW1A 3 1 2 FRAME GROUND SIGNAL GROUND Jumper W7 ties signal ground to frame ground The position is l...

Page 11: ...osition and jumper W15 is in the A B position the RS 485 driver is always turned on to enable transmission of data Therefore half duplex transmission cannot be performed See Section 3 1 5 for an explanation of the RS 485 driver Figure 1 Layout of the Printed Circuit Board ...

Page 12: ...se If jumper W9 is in the ON position CTS will follow RTS RS 232 485 422 Converter as DTE XW1B 8 Position Shunt When the RS 232 485 422 Converter is configured as a DTE device DIP shunt in position XW1B CTS is not supported 3 1 5 RS 485 DRIVER ENABLE W15 The RS 232 485 422 Converter s RS 485 driver can be set to be enabled one of three ways by RS 232 control signals by data or constantly on via W9...

Page 13: ...ignore the first character received Driver Constantly Enabled 4 Wire Only The RS 485 driver can be constantly enabled by setting jumper W9 to the ON position 3 1 6 HALF DUPLEX TURNAROUND DELAY When operating in half duplex mode jumper W8 in the HALF position B C position the RS 232 485 422 Converter adds a small delay each time it stops transmitting data and prepares to receive data This delay all...

Page 14: ...ortion could increase possibly causing errors in the data being transmitted 3 1 8 NORMAL LOOPBACK OPERATION The Normal Loopback switch S1 is a two position pushbutton switch extending through the front panel The Normal position permits normal operation of the RS 232 485 422 Converter The Loopback position allows data coming into the RS 232 485 422 Converter to be sent back out the same port This i...

Page 15: ...on This section contains block diagrams Figures 2 and 4 and jumper and switch settings Tables 1 and 2 for DCE DTE operation For a detailed description of the jumpers and switches see Section 3 1 Figure 2 Simplified Functional Block Diagram DCE Operation ...

Page 16: ...1 in A position 2 Signal ground connected to frame ground Connected W7 is IN solder your own 100 ohm 1 2 watt resistor in place Not connected W7 is OUT 3 Half or full duplex operation Full duplex W8 in FULL position 4 wire A B Half duplex W8 in HALF position 2 wire B C 4 CTS delay Yes W9 in 0 ms position W9 in 10 ms position W9 in 30 ms position No W9 in ON position no delay CTS follows RTS ...

Page 17: ...0 ms position b RS 485 driver enabled by data W15 in B C position and Disable timeout delay W17 msec A 70 B 7 C 2 D 0 7 E 0 15 c RS 485 driver constantly enabled W9 in ON position 6 Half duplex turnaround delay W8 in HALF position and 0 msec turnaround delay W16 in position A 0 1 msec turnaround delay W16 in position B 1 msec turnaround delay W16 in position C 5 msec turnaround delay W16 in positi...

Page 18: ...r unterminated Terminated S2 in TERM position Unterminated S2 in UNTERM position 8 Normal or loopback operation Normal mode S1 in Normal position Loopback mode S1 in Loopback position 9 RS 485 Interface Line Biased Fail S3 Off No line bias Safe Receive S3 On Line biased NOTE If line bias is on the RS 485 CD will ALWAYS be on ...

Page 19: ...18 RS 232 485 422 CONVERTERS Figure 3 Line Bias S2 shows the line termination when Term is selected S3 shows line bias when Bias is selected ...

Page 20: ...f the RS 232 485 422 Converter Since CTS is not used when the RS 232 485 422 Converter is configured as a DTE device placing jumper W9 in either the 0 10 or 30 msec position will allow the CD input to enable the RS 485 driver When jumper W9 is in the ON position the CD input has no affect on the RS 485 driver Opto isolated barrier in IC109 models ...

Page 21: ... ground connected to frame ground Connected W7 is IN 100 ohm 1 2 watt resistor soldered in place Not connected W7 is OUT 3 Half or full duplex operation Full duplex W8 in FULL position 4 wire A B Half duplex W8 in HALF position 2 wire B C 4 CTS delay CTS not supported 5 Enable RS 485 driver a RS 485 driver enabled by W15 in A B position and RS 232 lead CD W9 in 0 ms position W9 in 10 ms position W...

Page 22: ... turnaround delay W8 in HALF position and 0 msec turnaround delay W16 in position A 0 1 msec turnaround delay W16 in position B 1 msec turnaround delay W16 in position C 5 msec turnaround delay W16 in position D 35 msec turnaround delay W16 in position E 7 RS 485 interface terminated or unterminated Terminated S2 in TERM position Unterminated S2 in UNTERM position 8 Normal or loopback operation a ...

Page 23: ... with both RS 232 485 422 Converters terminated by setting switch S2 to the TERM position Figure 6 shows a typical point to point 2 wire half duplex connection with both RS 232 485 422 Converters terminated by setting switch S2 to the TERM position In a 4 wire point to point application each of the drivers on the two RS 232 485 422 Converters may always be enabled without any adverse effects In a ...

Page 24: ...23 CHAPTER 3 Installation Figure 5 Point To Point 4 Wire Full or Half Duplex Figure 6 Point to Point 2 Wire Half Duplex ...

Page 25: ...sition These devices are the two devices that have the greatest cable length between them not necessarily the devices that are physically located the farthest apart See Figures 7 and 8 A resistor shown in the circuit indicates that the termination resistor has been selected via switch S2 Note that although Figures 7 and 8 show only four RS 232 485 422 Converter devices networked together up to 64 ...

Page 26: ...te programmable logic controller PLC stations see Figure 9 A system protocol has been defined such that all the programmable logic controllers receive the information sent by the industrial controller but only the remote station specifically addressed will respond In this system the industrial controller and all the remote stations are DTE devices The step by step installation procedure follows Fi...

Page 27: ...been addressed two way data transmission can occur between that station and the industrial controller until the industrial controller sends a CLEAR command This command causes the remote PLC to resume data logging while waiting to be addressed again Therefore set each RS 232 485 422 Converter for full duplex operation jumper W8 in the FULL A B position 5 Connect the RS 232 485 422 Converters toget...

Page 28: ...ecomes active but before it starts to transmit 8 Set jumper W9 on the RS 232 485 422 Converter connected to the industrial controller to the ON position This allows the industrial controller to transmit to the remote PLCs without having to wait for any delay period 9 Set jumper W15 of each remote RS 232 485 422 Converter and the master RS 232 485 422 Converter to the A B position This allows the R...

Page 29: ...E DTE 1 AA Protective Ground Ground 2 BA Transmitted Data Data Input Output 3 BB Receive Data Data Output Input 4 CA Request to Send Control Input Output 5 CB Clear to Send Control Output Not connected 6 CC Data Set Ready Control Output Not connected held high 7 AB Signal Ground Ground 8 CF Data Carrier Detect Control Output Input NOTE Pins 9 through 25 are not used ...

Page 30: ...ires via these two outputs The TX LED indicates the state of these two leads When the TXA lead is positive with respect to the TXB lead a zero being transmitted the TX LED is lit RXA and RXB These are the received data inputs for the RS 485 port RXA RX The status of these leads is monitored by the RX LED RXB RX When the RXA lead is positive with respect to the RXB lead a zero is being received the...

Page 31: ...RTS CTS delay normal B C RTS CTS CD delay CTS inhibited if CD is present when RTS is raised W9 RTS CTS delay The time before the RS 485 driver is enabled and CTS is asserted after RTS is asserted The RS 485 driver is always enabled A 30 msec B 10 msec C 0 msec D ON W17 When W15 is in the B C Data Enabled position this is the time the RS 485 driver remains enabled after a low to high transition on ...

Page 32: ...C 1 msec D 5 msec E 35 msec NOTE If the Converter is configured Data Enabled W15 position B C and 2 wire W8 position B C then delays from W17 and W16 are cumulative S1 OUT Normal IN Loopback S2 OFF RS 485 Receiver Unterminated ON RS 485 Receiver Terminated S3 OFF Line Bias Off ON Line Bias On The Carrier Detect light will come on Default is 5 volts TB1 4 wire terminal block 1 Rx B 2 Rx A 3 Tx B 4 ...

Page 33: ...1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746 Copyright 2002 Black Box Corporation All rights reserved ...

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