Benutzeranleitung / Produktwartung RS-232485/422 Converter Plus, RS-232485/422 Opto-Isolator/Converter des Produzenten Black Box
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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, .
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 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 maner.
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.
5 CONTENTS Contents Chapter Page 1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 impro.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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)..
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.
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).
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).
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).
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 Protect.
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.
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.
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.
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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