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21

CHAPTER 3: Configuration

The switch settings generally needed to

configure the Converter for these applications
are shown in

Table 3-3

.

NOTE

Do not change switch settings until you have carefully
read Section 3.1.

Table 3-3. Typical Converter Applications

Switch Point-to-Point

Multipoint

Settings

4W

4W HDX

2W

4W

2W

S1-1: Rcv impedance

ON

ON

ON

Master—ON

(Termination)

Slaves—OFF
Last Slave—ON

S1-2: 2-wire/4-wire

OFF

OFF

ON

OFF

ON

S1-3: 2-wire/4-wire

OFF

OFF

ON

OFF

ON

S1-4: Echo

OFF

OFF

OFF

OFF

OFF

S2-1: Carrier Control

OFF

ON

ON

Master—OFF ON
Slaves—ON

S2-2: RTS/CTS Delay

ON

ON

ON

OFF

ON

S2-3: “Xmt Off” imp.

OFF

OFF

OFF

OFF

OFF

S2-4: “Xmt Off” imp.

OFF

OFF

OFF

OFF

OFF

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Summary of Contents for IC620A-F

Page 1: ...e in the U S 24 hours 7 A M Monday to midnight Friday 877 877 BBOX FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mail order Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com C o d e IC 6 2 0 A S u p e rS w it c h 8 1 0 1 0 0 ...

Page 2: ...d 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 This digital ...

Page 3: ...lavabo sótano mojado o cerca de una alberca etc 6 El aparato eléctrico debe ser usado únicamente con carritos o pedestales que sean recomendados por el fabricante 7 El 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 To...

Page 4: ...contactos y receptáculos donde salen del aparato 14 El equipo eléctrico debe ser limpiado únicamente de acuerdo a las recomendaciones del fabricante 15 En caso de existir 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 qu...

Page 5: ...4 RS 232 485 CONVERTER TRADEMARKS Product names mentioned in this manual may be trademarks or registered trademarks of their respective companies and are hereby acknowledged ...

Page 6: ...ings 16 3 1 2 DIP Switch S2 Settings 18 3 2 Typical Applications 20 4 Installation 24 4 1 Twisted Pair Connection 22 4 1 1 Twisted Pair Connections Using Terminal Blocks 23 4 1 2 Twisted Pair Connection Using RJ 11 or RJ 45 29 4 2 Wiring for Multipoint Circuits 31 4 3 Connection to the EIA TIA 574 Interface 33 4 4 Operating the Converter 34 Appendix EIA TIA 574 Interface 35 ...

Page 7: ...9 male 1 5 position terminal block IC623A F 1 DB9 female 1 RJ 11 female IC623A M 1 DB9 male 1 RJ 11 female IC624A F 1 DB9 female 1 RJ 45 female IC624A M 1 DB9 male 1 RJ 45 female Transmit Line 2 wire or 4 wire unconditioned unshielded solid core twisted pair Transmit Mode 4 wire full or half duplex 2 wire half duplex Control Signals DSR turns ON immediately after the terminal raises DTR DCD turns ...

Page 8: ...Protection 600 W power dissipation at 1 ms Temperature 32 to 122 F 0 to 50 C Humidity 5 to 95 noncondensing Maximum Altitude 10 000 ft 304 8 m MTBF 209 384 hours Power Draws operating power from EIA TIA 574 data and control signals no AC power or batteries required If necessary 6 to 12 VDC can be applied to pin 9 of the EIA TIA 574 interface Size 2 5 H x 1 2 W x 0 75 D 6 4 x 3 1 x 1 9 cm Shipping ...

Page 9: ...a multipoint polling environment For RS 485 applications that require hardware handshaking the Converter passes one control signal in each direction see the last bullet point in Section 2 2 for an explanation The Converter may be configured for high or low impedance and the carrier may be set to constantly on or controlled by RTS The unit can operate with or without echo RTS CTS delay may be set f...

Page 10: ...ates asynchronously point to point or multipoint over 2 or 4 wires Up to 31 multipoint device drops in a polling environment Data rates up to 115 2 Kbps Passes transmit and receive data one control signal in each direction No AC power or batteries required Variable high low impedance settings Able to operate with or without echo Carrier can be set as constantly on or controlled by RTS ...

Page 11: ...ER Twisted pair connection via strain relief RJ 11 or RJ 45 Silicon Avalanche Diode surge protection A Transmitter On signal received at the RS 485 RCV connection will cause DCD output at the RS 232 connector to assert High ...

Page 12: ...ory default settings and describes all possible configuration options For instructions on how to configure the Converter for specific applications see Section 3 2 3 1 Accessing the DIP Switches The Converter has a main PC board and a daughter board DIP switch S1 is located on the underside of the main PC board see Figure 3 1 DIP switch S2 is located on the top of the daughterboard see Figure 3 2 ...

Page 13: ...12 RS 232 485 CONVERTER Figure 3 1 Underside of the Converter s main PC board showing the location of DIP switch S1 Switch S1 ...

Page 14: ...13 CHAPTER 3 Configuration Figure 3 2 Top of the Converter s daughterboard showing the location of DIP switch S2 Switch S2 RCV XMT G ...

Page 15: ...s the Converter s internal PC boards insert a small flat blade screwdriver between the connector and the lip of the case and twist gently as shown in Figure 3 3 Figure 3 3 Opening the Converter s plastic case with a small screwdriver ...

Page 16: ... switch numbers 1 through 4 Use these numbers and the ON designation to orient the switch properly see Figure 3 4 Use a small screwdriver or similar instrument to set each individual switch 1 2 3 4 ON ON OFF Figure 3 4 Close up of DIP switches S1 and S2 showing ON OFF orientation ...

Page 17: ...ault settings for switch S1 Following Table 3 1 is a detailed description of each switch Table 3 1 Switch S1 Summary Table factory defaults in bold Position Function OFF Position ON Position S1 1 RCV impedance termination 16 K ohms typ 120 ohms S1 2 2 wire 4 wire 4 wire 2 wire S1 3 2 wire 4 wire 4 wire 2 wire S1 4 Echo Mode Echo OFF Echo ON Switches S1 2 and S1 3 should be switched simultaneously ...

Page 18: ...f 16 K ohms By selecting the proper impedance for each drop you can have up to 50 receivers in one application S1 1 Setting On Low 120 ohms Off High 16 K ohms typical S1 2 and S1 3 2 wire 4 wire Modes Switches S1 2 and S1 3 are set together to determine whether the Converter is in 2 wire or 4 wire operating mode NOTE 2 wire mode is half duplex only S1 2 S1 3 Setting On On 2 wire mode Off Off 4 wir...

Page 19: ...TS delay and communication protocol Table 3 2 shows the factory default settings for switch S2 Following Table 3 2 is a detailed description of each individual switch Table 3 2 Switch S2 Summary Table factory defaults in bold Position Function OFF Position ON Position S2 1 Carrier Control Constantly ON ON Position S2 2 RTS CTS Delay No Delay 8 msec S2 3 XMT Off impedance High Intermediate S2 4 XMT...

Page 20: ...dshaking applications S2 1 Setting On Controlled by RTS Off Constantly On NOTE When in Controlled mode RTS must go negative to turn off the Transmitter and enable the Receiver S2 2 RTS CTS Delay The setting for switch S2 2 determines the amount of delay between the time the Converter sees RTS and when it sends CTS NOTE The RTS CTS Delay setting should be based upon transmission timing S2 2 Setting...

Page 21: ...er is turned off The intermediate setting is useful in half duplex environments where the receiving device does not respond well to the high setting S2 3 S2 4 Setting On On Intermediate impedance Off Off High impedance 3 2 Typical Applications The Converter is commonly used in five types of applications 4 wire full duplex point to point 4 wire half duplex point to point 2 wire half duplex point to...

Page 22: ...cal Converter Applications Switch Point to Point Multipoint Settings 4W 4W HDX 2W 4W 2W S1 1 Rcv impedance ON ON ON Master ON Termination Slaves OFF Last Slave ON S1 2 2 wire 4 wire OFF OFF ON OFF ON S1 3 2 wire 4 wire OFF OFF ON OFF ON S1 4 Echo OFF OFF OFF OFF OFF S2 1 Carrier Control OFF ON ON Master OFF ON Slaves ON S2 2 RTS CTS Delay ON ON ON OFF ON S2 3 Xmt Off imp OFF OFF OFF OFF OFF S2 4 X...

Page 23: ...upports 2 wire or 4 wire communi cation between two or more EIA TIA 574 devices at data rates up to 115 2 Kbps There is one essential requirement for installing the Converter To function properly the Converter needs one or two twisted pairs of metallic wire These pairs must be unconditioned dry metallic wire between 19 and 26 AWG solid copper core unshielded the higher number gauges may limit dist...

Page 24: ...equires you to connect one or two pairs of bare wires to the Converter you will need to open the case to access the terminal blocks The following instructions tell you how to open the case connect the bare wires to the terminal blocks and fasten the strain relief collar in place so the wires won t pull loose 1 You should already have the case open for the configuration procedure If not see Section...

Page 25: ...ositive and negative on the terminal block making careful note of which color is positive and which color is negative 5 Connect the other pair of wires to RCV and RCV receive positive and negative on the terminal block again making careful note of which color is positive and which color is negative Ultimately you will want to construct a two pair crossover cable that makes a connection with the tw...

Page 26: ... 4 XMT XMT XMT XMT Figure 4 4 Transmit Pair NOTE If there is a shield around the twisted pair cable it may be connected to G on the terminal block To avoid ground loops we recommend connecting the shield at the computer end only A ground wire is not necessary for proper operation of the Converter 7 When you finish connecting the wires to the terminal block the assembly should resemble Figure 4 5 ...

Page 27: ...ither side of the telephone wire and press together very lightly Slide the assembly so that it is about two inches from the terminal posts and press together firmly If your cable diameter is too small or too large for our strain relief call for technical support XMT G RCV Figure 4 6 Installing the strain relief assembly G XMT RCV ...

Page 28: ...n the bottom half of the modem case and seat it into the recess in the case If the telephone wire is too thin to be held by the strain relief assembly you will need to order a different sized strain relief Call for technical support XMT G RCV Figure 4 7 Completing the installation of the strain relief assembly ...

Page 29: ...snap the case together yet Figure 4 8 Closing the case 11 Insert one captive screw through a saddle washer and then insert the captive screw with the washer on it through the hole in the DB25 end of the case Snap that side of the case closed Repeat the process for the other side This completes the cable installation ...

Page 30: ...verter s twisted pair interface are pre wired for a standard telco wiring environment The signal pin relationships are shown in Figure 4 9 RJ 11 Signal RJ 45 Signal 1 GND1 1 N C 2 RCV 2 GND1 3 XMT 3 RCV 4 XMT 4 XMT 5 RCV 5 XMT 6 GND 6 RCV 7 GND 8 N C 1 Connection to ground is optional Figure 4 9 Signal Pin Relationships ...

Page 31: ...D1 RCV 2 4 XMT XMT 3 5 RCV XMT 4 2 XMT RCV 5 3 XMT GND1 6 1 GND1 1 Connection to ground is optional Figure 4 10 RJ 11 Cable 4 wire Signal Pin Pin Signal GND1 2 7 GND1 RCV 3 5 XMT XMT 4 6 RCV XMT 5 3 RCV RCV 6 4 XMT GND1 7 2 GND1 Figure 4 11 RJ 45 Cable 4 wire ...

Page 32: ... XMT 4 4 XMT XMT 5 5 XMT Figure 4 13 RJ 45 Cable 2 wire 4 2 Wiring for Multipoint Circuits The Converter supports multipoint applications using a daisychain topology This topology requires special wiring as well as specific DIP switch settings for master and slave units Refer to Table 3 3 for multipoint DIP switch settings ...

Page 33: ...ber of drops data rate wire gauge etc Call Technical Support for specific distance estimates Figure 4 14 shows how to wire the two pair cables properly for a Converter daisychain topology Figure 4 14 Daisychain wiring for the Converter host and slaves XMT A XMT B RCV B RCV A XMT A XMT A RCV B RCV B RCV B RCV B RCV A RCV A RCV A RCV A XMT A XMT A XMT B XMT B XMT B XMT B MASTER SLAVE 1 SLAVE 2 SLAVE...

Page 34: ... of the shortest possible length we recommend 6 ft 1 8 m or less The DB9 connector on the Converter is wired according to the EIA TIA 574 Standard as shown in Figure 4 15 DB9 Signal 1 CD 2 RD 3 TD 4 DTR 5 SG FG 6 DSR 7 RTS 8 CTS 9 Optional 6 12 VDC Figure 4 15 EIA TIA 574 Standard NOTE The Converter is configured as a DCE and is therefore designed to connect to a DTE If you need to connect the Con...

Page 35: ...were a standard cable connection Operating power is derived from the RS 232 data and control signals there is no ON OFF switch All data signals from the RS 232 and RS 485 interfaces are passed straight through One hardware flow control signal is also passed in each direction see the last bullet point in Section 2 2 for an explanation ...

Page 36: ...35 APPENDIX Appendix EIA TIA 574 Interface DB9 Signal Direction 1 CD Output 2 RD Output 3 TD Input 4 DTR Input 5 SG FG 6 DSR Output 7 RTS Input 8 CTS Output 9 Optional 6 12 VDC ...

Page 37: ...NOTES ...

Page 38: ...1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746 Copyright 1998 Black Box Corporation All rights reserved ...

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