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Black Box IC108A manual

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Table of contents for the manual

  • Page 1

    CUSTOMER SUPPORT INFORMATION Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500 ) FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 Mailing address: Black Box Corporation , 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com APRIL 200[...]

  • Page 2

    1 FCC AND IC RFI ST A TEMENTS FEDERAL COMMUNICA TIONS COMMISSION AND INDUSTR Y CANADA RADIO FREQUENCY INTERFERENCE ST A TEMENTS 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 communic[...]

  • Page 3

    2 RS-232 ↔ 485/422 CONVER TERS NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY ST A TEMENT 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 la[...]

  • Page 4

    3 NOM ST A TEMENT 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada. 13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde s[...]

  • Page 5

    4 RS-232 ↔ 485/422 CONVER TERS TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.[...]

  • Page 6

    5 CONTENTS Contents Chapter Page 1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

  • Page 7

    6 RS-232 ↔ 485/422 CONVER TERS 1. Specifications Optical Isolation: IC109A, IC109AE, IC109C only Interface: (1) asynchronous RS-232 port (DTE/DCE selectable); (1) asynchronous RS-485 port with improved surge protection and switch-selectable line termination or line bias Connectors: (1) DB25 female RS-232 port; (1) four-wire terminal block (TB1) R[...]

  • Page 8

    7 CHAPTER 1: Specifications Typical Speed Versus Distance (4-wire point-to-point 26-AWG twisted 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 Spe[...]

  • Page 9

    8 RS-232 ↔ 485/422 CONVER TERS 2. Introduction The RS-232 ↔ 485/422 Converter Plus is an RS-232-to-RS-485 interface converter that operates in the same manner as a line driver. It allows an RS-232 device to transmit data over much longer distances than is normally possible (up to 4 miles—6.4 km—at 1200 bps). The advantage of the RS-232 ↔ [...]

  • Page 10

    9 CHAPTER 3: Installation 3. Installation This section describes the jumper and switch functions for configuring the RS-232 ↔ 485/422 Converter. See Figure 1 on the next page for the component locations. To install your RS-232 ↔ 485/422 Converter: 1. Set each of the ten jumpers/switches for your application. 2. Connect the RS-232 ↔ 485/422 Co[...]

  • Page 11

    10 RS-232 ↔ 485/422 CONVER TERS NOTE When the jumper W9 (CTS) is in the ON position 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[...]

  • Page 12

    11 CHAPTER 3: Installation 3.1.4 CTS D ELAY (W9 J UMPER ) When the transmitter of a device is first turned on, an unstable carrier signal is transmitted for several milliseconds. If data was sent during this period, it would be received as distorted information. Setting a CTS delay on the RS-232 ↔ 485/422 Converter allows the communications link [...]

  • Page 13

    12 RS-232 ↔ 485/422 CONVER TERS Driver Enabled by Data The RS-485 driver can also be enabled without requiring an RS-232 control lead to be asserted. When jumper W15 is placed in the B-C position, the driver is enabled when data is received on the RS-232 port of the RS-232 ↔ 485/422 Converter. As soon as the first bit of the first character is [...]

  • Page 14

    13 CHAPTER 3: Installation Point-to-Point When only two devices are connected to the line in a point-to-point application, each device should have the termination network connected to the line. Set switch S2 to the “TERM” position. Multipoint For multipoint applications, switch S2 should be in the “UNTERM” position on all the RS-232 ↔ 485[...]

  • Page 15

    14 RS-232 ↔ 485/422 CONVER TERS 3.2 DCE/DTE Configuration 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

    15 CHAPTER 3: Installation T able 1. DCE Jumper Settings. NOTE For additional information on the jumper requirements, see Section 3.1. Function Jumper Requirements 1. Configure RS-232 port as DCE XW1 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 con[...]

  • Page 17

    16 RS-232 ↔ 485/422 CONVER TERS T able 1 (continued). DCE Jumper Settings. Function Jumper Requirements 5. Enable RS-485 driver a. RS-485 driver enabled by RS-232 control leads • by RTS W15 in A-B position and W9 in 0-ms position W9 in 10-ms position W9 in 30-ms position b. RS-485 driver enabled by data W15 in B-C position and • Disable timeo[...]

  • Page 18

    17 CHAPTER 3: Installation T able 1 (continued). DCE Jumper Settings. Function Jumper Requirements 7. RS-485 interface terminated or 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 Interfac[...]

  • Page 19

    18 RS-232 ↔ 485/422 CONVER TERS Figure 3. Line Bias. S2 shows the line ter mination when “T er m” is selected. S3 shows line bias when “Bias” is selected.[...]

  • Page 20

    19 CHAPTER 3: Installation Figure 4. Simplified Functional Block Diagram (DTE Operation). NOTE The delay settings for W9 apply only to the CTS output of 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 [...]

  • Page 21

    20 RS-232 ↔ 485/422 CONVER TERS T able 2. DTE Jumper Settings. NOTE For additional information on the jumper requirements, see Section 3.1. Function Jumper Requirements 1. Configure RS-232 port as DTE XW1 in B position 2. Signal ground connected to frame ground • Connected W7 is IN (100-ohm, 1/2-watt resistor soldered in place) • Not connecte[...]

  • Page 22

    21 CHAPTER 3: Installation T able 2 (continued). DTE Jumper Settings. Function Jumper Requirements b. RS-485 driver enabled by data W15 in B-C position and • Disable timeout delay W17 msec A7 0 B7 C2 D 0.7 E0 . 1 5 c. RS-485 driver constantly enabled W9 in ON position 6. Half-duplex turnaround delay W8 in HALF position and • 0-msec turnaround d[...]

  • Page 23

    22 RS-232 ↔ 485/422 CONVER TERS T able 2 (continued). DTE Jumper Settings. Function Jumper Requirements 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. 3.3 T ypical Applications This section describes some typical applications where the RS-232 ?[...]

  • Page 24

    23 CHAPTER 3: Installation Figure 5. Point-T o-Point, 4-Wire (Full- or Half-Duplex). Figure 6. Point-to-Point, 2-Wire (Half-Duplex).[...]

  • Page 25

    24 RS-232 ↔ 485/422 CONVER TERS Figure 7 shows a typical multipoint, 4-wire, full- or half-duplex connection. Figure 8 shows a typical multipoint, 2-wire, half-duplex connection. In the multipoint applications depicted in Figures 7 and 8, the devices at the extreme opposite ends of the installation are terminated by setting switch S2 to the TERM [...]

  • Page 26

    25 CHAPTER 3: Installation Figure 8. Multipoint, 2-Wire (Half-Duplex). Sample 4-Wire Multipoint Configuration In the following application, an industrial controller is used to gather information from several remote programmable logic controller (PLC) stations (see Figure 9). A system protocol has been defined such that all the programmable logic co[...]

  • Page 27

    26 RS-232 ↔ 485/422 CONVER TERS Figure 9. Sample Multipoint Operation. Installation Procedure for the Multipoint Application in Figure 9 1. Set all the RS-232 ↔ 485/422 Converters for DCE operation (jumper XW1 in position A). 2. Connect a straight-through cable from the RS-232 port on each RS-232 ↔ 485/422 Converter to the RS-232 port on each[...]

  • Page 28

    27 CHAPTER 3: Installation 7. Since all the remote PLC stations must be inactive until addressed, the RS-485 driver of each remote RS-232 ↔ 485/422 Converter must not be constantly enabled (W9 of each remote RS-232 ↔ 485/422 Converter must be set to a position other than ON). The remote PLCs are fairly far from the industrial controller in our [...]

  • Page 29

    28 RS-232 ↔ 485/422 CONVER TERS Appendix A. Pinning T able 3. RS-232 interface (* denotes pins that are used). Pin Circuit Description Signal T ype Direction when configured as DCE 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 Cle[...]

  • Page 30

    29 APPENDIX A: Pinning T able 4. RS-485 pinning char t. Pin Name Description TXA and TXB Data received by the RS-232 ↔ 485/422 Converter at the TXA=TX- RS-232 port is transmitted out of the unit over twisted- TXB=TX+ pair wires via these two outputs. The TX LED indicates the state of these two leads. When the TXA lead is positive with respect to [...]

  • Page 31

    30 RS-232 ↔ 485/422 CONVER TERS Quick Reference: User-Selectable Options Use this list as a quick-reference guide when you need to change the jumper settings. An asterisk (*) designates the factory-preset jumper settings. XW1A DCE* XW1B DTE W8 A-B* 4-wire B-C 2-wire W15 A-B* RTS/CD enabled B-C Data enabled (Maximum speed is 64K.) W5 A-B* RTS/CTS*[...]

  • Page 32

    31 QUICK REFERENCE: USER-SELECT ABLE OPTIONS W16 Turnaround delay (When W8 is in the B-C [2 wire] position, this is the time after the driver is disabled and before the receiver is enabled.) A 0 msec B* 0.1 msec 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 delay[...]

  • Page 33

    1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746 © Copyright 2002. Black Box Corporation. All rights reserved.[...]