Manuel d'utilisation / d'entretien du produit RS-422 du fabricant Black Box
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4 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T TRADEMARKS All applied-for and registered trademarks are the property of their respective owners. Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.
5 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T Contents 1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T Appendix A: Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . 27 Appendix B: Board Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Appendix C: Electrical Interface .
7 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T 1. Specifications Communication Chip — IC058C: 16750 UART; IC183C: 16950 UART Maximum Distance — 4000 ft. (1219.2 m) Operation — 2- or 4-wire Protocol — Asynchronous Speed — IC058C: Up to 460.8 kbps; IC183C: 460.
8 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T 2. Introduction 2.1 Overview The RS-422/485 Serial Interface Plus, 4-Port provides the PC with four additional RS-422/485 serial ports for terminals, modems, printers, etc. The Card is RS-485 compatible without special software or drivers.
9 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T To install the Card using factory-default settings, refer to Chapter 4 , Installation . For your reference, record installed Card settings below: T able 2-2. Y our Installed Card Settings. Port # Base Address IRQ Electrical Specifications Port 1 Port 2 Port 3 Port 4 2.
10 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T 2.4.2 M ODEM C ONTROL S IGNALS Some software packages require the use of modem handshake signals such as CTS or DCD. Refer to your application software manual to determine the requirements for modem control signals.
11 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T 3. Card Setup The RS-422/485 Serial Interface Plus, 4-Port Card has several jumper straps which must be set for proper operation. 3.1 Address Selection Each port on the Card occupies eight consecutive I/O locations.
12 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T T able 3-1. Available Address Combinations. Switch 6 Switch 7 Switch 8 Port 1 Port 2 Port 3 Port 4 On On Off 3F8 2F8 3E8 2E8 On Off On 2F8 3E8 2E8 2E0 On .
13 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T T able 3-2. Address Selection T able. Address lines A9 A8 A7 A6 A5 Address Selected 12345 280-29F Off On Off On On 2A0-2BF Off On Off On Off 380-39F Off O.
14 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T T able 3-3. Por t to Connector T able. Port # Connector Location Address Example (Base=2E0) 1 1 Base+0 2E0-2E7 2 2 Base+8 2E8-2EF 3 3 Base+16 2F0-2F7 4 4 Base+24 2F8-2FF 3.2 Jumper Selections For ease of configuration, the headers are grouped by port.
15 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T 3 4 5 6 7 9 1 0 1 1 1 2 1 5 Figure 3-2. Headers J1B – J4B, IRQ Selection. Any two or more ports can share a common IRQ by placing the jumpers on the same IRQ setting and setting the appropriate selections at J1A through J4A.
16 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T Set the jumpers to “S” for shared interrupt mode on all blocks sharing an IRQ except one. Set that port block for “M.” This provides the pull-down resistor circuit that makes sharing IRQs possible.
17 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T 3.5 RS-485 Enable Modes RS-485 is ideal for multi-drop or network environments. RS-485 requires a tri- state driver (not dual-state) that will allow the electrical presence of the driver to be removed from the line.
18 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T Figure 3-5. Headers J1D - J4D, RS-422. AT RT NE AT RT NE Figure 3-6. Headers J1D - J4D, RS-485 “Auto” Enabled, with “No Echo.
19 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T Figure 3-7. Headers J1D - J4D, RS-485 “Auto” Enabled, with “Echo.” AT RT NE AT RT NE Figure 3-8. Headers J1D - J4D, RS-485 “ RTS” Enabled, with “No Echo.
20 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T Figure 3-9. Headers J1D - J4D, RS-485 “RTS” Enabled, with “Echo.” 3.7 Line T ermination Typically, each end of the RS-485 bus must have line-terminating resistors (RS-422 terminates at the receive end only).
21 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T T able 3-4. Jumper Functions. Name Function P Adds or removes the 1-Kohm pull-down resistor in the RS-422/RS-485 receiver circuit (Receive data only). P Adds or removes the 1-Kohm pull-up resistor in the RS-422/RS-485 receiver circuit (Receive data only).
22 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T Figure 3-11. Clocking Mode “Divide By 4.” To double these rates up to a maximum rate for 230.4 kbps, place the jumper in the “divide by 2” (silk-screen DIV2) position. DIV1 DIV2 DIV4 DIV1 DIV2 DIV4 Figure 3-12.
23 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T Figure 3-13. Clocking Mode “Divide By 1.” DIV1 DIV2 DIV4.
24 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T 4. Installation IMPOR T ANT You MUST set up the operating system BEFORE you physically install the Card. 4.1 Software Installation If you are installing an ISA adapter in DOS, OS/2, or QNX, please refer to the appropriate directory on one of the Serial Utilities Disks for instructions.
25 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T 4.2 Hardware Installation The RS-422/485 Serial Interface Plus Card can be installed in any of the PC expansion slots. The Card contains several jumper straps for each port that you must set for proper operation.
26 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T 5. T roubleshooting Two Serial Utility Diskettes are supplied with the adapter and will be used in the troubleshooting procedures. By using this diskette and following these simple steps, most common problems can be eliminated.
27 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T 6. The following are known I/O conflicts: • The 278 and 378 settings may conflict with your printer I/O adapter.
28 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T Appendix A: Connector Pin Assignments T able A-1. DB9 Pin Assignments. Signal Name Pin # Mode GND Ground 5 TX+ Transmit Data Positive 4 Output TX- Transmi.
29 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T T able A-2. DB37 Pin Assignments. Port # 1 2 3 4 GND 33 14 24 5 TX- 35 12 26 3 RTS- 17 30 8 21 TX+ 34 13 25 4 RX- 36 11 27 2 CTS- 16 31 7 22 RTS+ 18 29 9 .
30 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T Appendix B: Board Layout C13 74LS244 U10 C17 74LS245 U16 RP4 RP3 C16 75174 U15 C15 75175 U14 C14 75174 U13 75175 U12 74HC04 U1 1 R17 J4E P P T L L R16 J3E.
31 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T Appendix C: Electrical Inter face RS-422 The RS-422 specification defines the electrical characteristics of balanced- voltage digital interface circuits. RS-422 is a differential interface that defines voltage levels and driver/receiver electrical specifications.
32 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T Appendix D: Asynchronous Communications In serial data communications, individual bits of a character are transmitted consecutively to a receiver that assembles the bits back into a character.
33 RS-422/485 SERIAL INTERF ACE PLUS, 4-POR T An extra bit used for error detection is often appended before the stop bits. This special bit is called the parity bit. Parity is a simple method of determining if a data bit has been lost or corrupted during transmission.
1 000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746 © Copyright 2000. Black Box Corporation. All rights reserved..
Un point important après l'achat de l'appareil (ou même avant l'achat) est de lire le manuel d'utilisation. Nous devons le faire pour quelques raisons simples:
Si vous n'avez pas encore acheté Black Box RS-422 c'est un bon moment pour vous familiariser avec les données de base sur le produit. Consulter d'abord les pages initiales du manuel d'utilisation, que vous trouverez ci-dessus. Vous devriez y trouver les données techniques les plus importants du Black Box RS-422 - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation Black Box RS-422, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le Black Box RS-422 va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le Black Box RS-422, mais vous avez pas encore lu le manuel d'utilisation, vous devez le faire pour les raisons décrites ci-dessus,. Vous saurez alors si vous avez correctement utilisé les fonctions disponibles, et si vous avez commis des erreurs qui peuvent réduire la durée de vie du Black Box RS-422.
Cependant, l'un des rôles les plus importants pour l'utilisateur joués par les manuels d'utilisateur est d'aider à résoudre les problèmes concernant le Black Box RS-422. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei Black Box RS-422 ainsi que les instructions sur la façon de les résoudre. Même si vous ne parvenez pas à résoudre le problème, le manuel d‘utilisation va vous montrer le chemin d'une nouvelle procédure – le contact avec le centre de service à la clientèle ou le service le plus proche.
