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Black Box DB9F/Term (IC620A-F) manuel d'utilisation

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  • Page 1

    MARCH 1998 IC620A-F IC623A-M IC620A-M IC624A-F IC623A-F IC624A-M RS-232/485 Con verter CUSTOMER SUPPORT INFORMATION Order toll-free 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, Law[...]

  • Page 2

    1 FCC AND IC STATEMENTS FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates, uses, and can radiate radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communi- cation. It[...]

  • Page 3

    2 RS-232/485 CONVERTER NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura. 3. Todas las advertenci[...]

  • Page 4

    3 NOM STATEMENT 10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor como radiadores, registros de calor, estufas u otros aparatos (incluyendo amplificadores) que producen calor . 11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo de operación, o como se indi[...]

  • 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

    5 TABLE OF CONTENTS CONTENTS 1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . .6 2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . .8 2.1 Description . . . . . . . . . . . . . . . . . . . . . . .8 2.2 Features . . . . . . . . . . . . . . . . . . . . . . . . .9 3. Configuration . . . . . . . . . . . . . . . . . . .[...]

  • Page 7

    6 RS-232/485 CONVERTER 1. Specifications Transmission Format — Asynchronous Data Rate — Up to 115,200 bps Range — Up to 9 miles (14.4 km) Serial Interface — EIA/TIA-574 standard RS-232 DCE Connectors — IC620A-F: (1) DB9 female, (1) 5-position terminal block, IC620A-M: (1) DB9 male, (1) 5-position terminal block; IC623A-F : (1) DB9 female,[...]

  • Page 8

    7 CHAPTER 1: Specifications CTS turns ON after the terminal raises RTS RTS/CTS Delay — 8 msec or “no delay” Carrier — The carrier is switch-selected either continuous operation or switched operation, controlled by RTS Surge Protection — 600 W power dissipation at 1 ms Temperature — 32 to 122°F (0 to 50°C) Humidity — 5 to 95%, noncon[...]

  • Page 9

    8 RS-232/485 CONVERTER 2. Introduction 2.1 Description The RS-232/485 Converter (IC620A) is an ultra- miniature interface converter. Requiring no AC power or batteries for operation, the Converter supports asynchronous communication up to 115.2 Kbps over one or two unconditioned twisted pairs. Distances up to 15 miles (24 km) are attainable at lowe[...]

  • Page 10

    9 CHAPTER 2: Introduction Six models are available: • DB9F/Term (IC620A-F) • DB9M/Term (IC620A-M) • DB9F/RJ-11 (IC623A-F) • DB9M/RJ-11 (IC623A-M) • DB9F/RJ-45 (IC624A-F) • DB9F/RJ-45 (IC624A-M) 2.2 Features • Operates asynchronously, point-to-point or multipoint, over 2 or 4 wires. • Up to 31 multipoint device drops in a polling env[...]

  • Page 11

    10 RS-232/485 CONVERTER • 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

    11 CHAPTER 3: Configuration 3. Configuration The Converter is configured using two internal 4-position DIP switches. This section shows how to access the DIP switches, provides an overview of the factory-default settings, and describes all possible configuration options. For instructions on how to configure the Converter for specific applications, [...]

  • 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

    14 RS-232/485 CONVERTER To access 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

    15 CHAPTER 3: Configuration Both DIP switch S1 and S2 are marked with individual 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, s[...]

  • Page 17

    16 RS-232/485 CONVERTER 3.1.1 DIP S WITCH S1 S ETTINGS DIP switch S1 is used to configure receive impedance (termination), 2-wire/4-wire operation and “echo” enable/disable. Table 3-1 shows the factory-default settings for switch S1. Following Table 3-1 is a detailed description of each switch. Table 3-1. Switch S1 Summary Table (factory defaul[...]

  • Page 18

    17 CHAPTER 3: Configuration S1-1: Receive Impedance (Termination) The setting for switch S1-1 selects the impedance of the input receiver. You may select either a “low” impedance of 120 ohms or a “high” impedance of 16 K ohms. By selecting the proper impedance for each drop, you can have up to 50 receivers in one application. S1-1 Setting O[...]

  • Page 19

    18 RS-232/485 CONVERTER S1-4: Echo Mode The setting for switch S1-4 determines whether the Converter echoes data back to the transmitting device (half-duplex mode only). S1-4 Setting On Echo On Off Echo Off 3.1.2 DIP S WITCH S2 S ETTINGS DIP switch S2 is used to configure carrier control, RTS/CTS delay, and communication protocol. Table 3-2 shows t[...]

  • Page 20

    19 CHAPTER 3: Configuration S2-1: Carrier Control Method The setting for S2-1 determines whether the carrier is “Constantly On” or “Controlled by RTS.” This allows for operation in switched carrier, multipoint, and/or hardware handshaking applications. S2-1 Setting On Controlled by RTS Off Constantly On NOTE When in Controlled mode, RTS mus[...]

  • Page 21

    20 RS-232/485 CONVERTER S2-3 and S2-4: “Transmit Off” Impedance Switches S2-3 and S2-4 are set together to determine whether the receiving device “sees” the impedance of the Converter’s transmitter as being “high” or “intermediate” when the transmitter is turned off. The “intermediate” setting is useful in half-duplex environm[...]

  • Page 22

    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[...]

  • Page 23

    22 RS-232/485 CONVERTER 4. Installation Once the Converter is properly configured, it is ready to connect to your system. This section tells you how to properly connect the Converter to the twisted-pair and EIA/TIA-574 interfaces, and how to operate the Converter. 4.1 Twisted-Pair Connection The Converter supports 2-wire or 4-wire communi- cation b[...]

  • Page 24

    23 CHAPTER 3: Configuration For your convenience, the Converter is available with several different twisted-pair interfaces: RJ-11 jack, RJ-45 jack, and terminal blocks with strain relief. The Converter is also available with DB25 male or female connectors. 4.1.1 T WISTED -P AIR C ONNECTIONS U SING T ERMINAL B LOCKS If your application requires you[...]

  • Page 25

    24 RS-232/485 CONVERTER 3. Strip the insulation on each of the twisted- pair wires about 1⁄8 inch. Figure 4-2. Stripping the insulation on the twisted-pair wires. 4. In a two-pair circuit, connect one pair of wires to XMT+ and XMT- (transmit positive and negative) on the terminal block, making careful note of which color is positive and which col[...]

  • Page 26

    25 CHAPTER 3: Configuration XMT+----------------------------------------RCV+ XMT- --------------------------------------- RCV- G-------------To Shield (Optional) G RCV+-----------------------------------------XMT+ RCV - ----------------------------------------XMT- Figure 4-3. Two-Pair Crossover Cable. 6. In a single-pair circuit, use only the trans[...]

  • Page 27

    26 RS-232/485 CONVERTER Figure 4-5. Wires connected to the terminal block. 8. Place the two halves of the strain-relief assembly on either 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 f[...]

  • Page 28

    27 CHAPTER 3: Configuration 9. Insert the strain-relief assembly with the wire going through it into the slot in 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.) [...]

  • Page 29

    28 RS-232/485 CONVERTER 10. Bend the top of the case as necessary to place it over the strain-relief assembly. Do not 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[...]

  • Page 30

    29 CHAPTER 3: Configuration 4.1.2 T WISTED -P AIR C ONNECTION U SING RJ-11 OR RJ-45 The RJ-11 and RJ-45 connectors on the Converter’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--------------GND 1 1---------------N/C 2-------------[...]

  • Page 31

    30 RS-232/485 CONVERTER Signal Pin# Pin# Signal GND 1 1--------------6 GND 1 RCV- 2--------------4 XMT- XMT+ 3--------------5 RCV+ XMT- 4--------------2 XMT+ RCV+ 5--------------3 XMT+ GND 1 6--------------1 GND 1 1 Connection to ground is optional. Figure 4-10. RJ-11 Cable (4-wire). Signal Pin# Pin# Signal GND 1 2--------------7 GND 1 RCV- 3------[...]

  • Page 32

    31 CHAPTER 3: Configuration Signal Pin# Pin# Signal XMT+ 3---------------3 XMT+ XMT- 4---------------4 XMT- Figure 4-12. RJ-11 Cable (2-wire). Signal Pin# Pin# Signal 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 dais[...]

  • Page 33

    32 RS-232/485 CONVERTER D AISYCHAIN T OPOLOGY Using a daisychain topology, you may connect several Converters together in a master/slave arrangement. Maximum distance between the units will vary based upon the number of drops, data rate, wire gauge, etc. Call Technical Support for specific distance estimates. Figure 4-14 shows how to wire the two-p[...]

  • Page 34

    33 CHAPTER 3: Configuration 4.3 Connection to the EIA/TIA-574 Interface The Converter is designed to plug directly into the DB9 serial port of an EIA/TIA-574 DTE device (PC, laptop, host). If you must use a cable to connect the Converter to the DTE device, make sure that it is a straight-through cable of the shortest possible length—we recommend [...]

  • Page 35

    34 RS-232/485 CONVERTER 4.4 Operating the Converter Once the Converter is properly installed, it should operate transparently — as if it 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 throug[...]

  • 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----------[...]

  • Page 37

    1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746 © Copyright 1998. Black Box Corporation. All rights reserved.[...]