Black Box IC173C Manuel utilisateur
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INFORMATION
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JUNE 2000
IC600C
IC173C
Dual Port RS-422/485
Serial Interface
3
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 communication.
It has been tested and found to comply with the limits for a Class A
computing device in accordance with the specifications in Subpart J of Part 15
of FCC rules, which are designed to provide reasonable protection against
such interference when the equipment is operated 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 apparatus does not exceed the Class A limits for radio noise emission from
digital apparatus set out in the Radio Interference Regulation of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de classe A prescrites dans le Règlement sur le
brouillage radioélectrique publié par Industrie Canada.
TRADEMARKS USED IN THIS MANUAL
PS/2 is a registered trademark of IBM Corporation.
UL is a registered trademark of Underwriters Laboratories Incorporated.
Any other trademarks mentioned in this manual are acknowledged to be the property of
the trademark owners.
FCC AND IC STATEMENTS, TRADEMARKS
4
DUAL PORT RS-422/485 SERIAL INTERFACE
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 advertencias en el aparato eléctrico y en sus instrucciones de
operación deben ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo,
cerca de la tina de baño, 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. Todo otro servicio
deberá ser referido a personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no
interfiera su uso. La colocación del aparato eléctrico sobre una cama,
sofá, alfombra o superficie similar puede bloquea la ventilación, no se
debe colocar en libreros o gabinetes que impidan el flujo de aire por los
orificios de ventilación.
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.
5
NOM STATEMENT
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo
del tipo descrito en el instructivo de operación, o como se indique en el
aparato.
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 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 que objectos liquidos no sean
derramados sobre la cubierta u orificios de ventilación.
18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del
aparato; o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio en su
desempeño; o
E: El aparato ha sido tirado o su cubierta ha sido dañada.
6
DUAL PORT RS-422/485 SERIAL INTERFACE
Chapter Page
1. Specifications...................................................................................................7
2. Introduction ....................................................................................................9
2.1 Description.........................................................................................9
2.2 Features ..............................................................................................9
2.3 RS-422/485 Specifications...............................................................10
3. Address Selection ..........................................................................................12
4. Option Selections..........................................................................................14
4.1 E1 and E2 .........................................................................................14
4.2 E3 and E4 .........................................................................................15
5. Interface Options ..........................................................................................16
5.1 Line Termination ............................................................................16
5.2 Oscillator Option.............................................................................16
6. Installation.....................................................................................................17
7. Troubleshooting............................................................................................19
Appendix A. Block Diagram ..............................................................................21
Appendix B. Async Communications................................................................22
Table of Contents
7
CHAPTER 1: Specifications
Number of Ports — Dual-port RS-422/485
Maximum Data Distance — Up to 5000 feet (1524 m)
Speed — 115.2 Kbps (RS-422/485); Maximum data
rate depends on software, CPU, and cable
length
Protocol — Asynchronous only
Connectors — (2) DB9 male
Communications Chip — IC600C: 16550 UART;
IC173C: 16850 UART
System Requirements — ISA bus
Operating Temperature — 32 to 122°F (0 to 50°C)
Storage Temperature — –4 to +158°F (–20 to +70°C)
Relative Humidity — 90%
MTBF — > 150,000 hours
MTTR — < 0.25 hour
Manufacturing — IPC 610-A Class-III standards adhered to
with a 0.1 visual A.Q.L. and 100%
Functional Testing; Boards are built to UL®
94V0 rating and are 100% electrically
tested. Most boards are solder mask over
bare copper or tin nickel.
1. Specifications
8
DUAL PORT RS-422/485 SERIAL INTERFACE
Power —
Supply Line +5 VDC +12 VDC -12 VDC
Rating (mA) 195 mA 25 mA 25 mA
Board Size — Half card; Board length is approximately
4.6 inches (11.7 cm). The height of the
board measured from the motherboard
edge connector is approximately 4.2 inches
(10.7 cm).
Shipping Weight — 2 lb. (0.9 kg)
9
CHAPTER 2: Introduction
2.1 Description
The Dual Port RS-422/485 Serial Interface provides two async serial ports
which can interface to RS-422 or RS-485.
The Dual Port RS-422/485 Serial Interface board (IC600C) utilizes the 16550
UART chip. This chip features programmable baud rate, data format, and
interrupt control, and a 16-byte FIFO. The IC173C features the 16850 UART,
which provides a 128-byte FIFO.
Each serial port can be set as COM1 or as COM2, providing total
compatibility with most communications software and languages. Drivers
and receivers for RS-422/485 are provided on the serial port.
2.2 Features
• Supports RS-422/485 interface connections.
• Directly address up to 64 RS-485 devices right from your PC.
• No additional line driver or converter is needed.
• Each port occupies 8 consecutive I/O locations and has base addressing
that’s user-selectable.
• Multiple cards can share the same IRQ level (2 through 5).
• RTS and CTS control signals provided on both ports.
• Includes self-explaining utility software for diagnostics.
2. Introduction
10
DUAL PORT RS-422/485 SERIAL INTERFACE
2.3 RS-422/485 Specifications
RS-422 allows very-long-distance (5000 feet at 9600 bps) communications with
virtually error-free differential drive characteristics. RS-422 is similar to RS-232 in
that it is optimized as a single-node protocol: Typically only one RS-422 device is
connected to a single port. RS-422 signal levels are the standard electrical
specification used in RS-449 and EIA-530. This allows interfacing with equipment
that meets these specifications by using a DB9 to DB37 adapter cable.
RS-485 is backward-compatible with RS-422; however it is optimized for
partyline or multi-drop applications. The output of the RS-422/485 driver is
capable of being active (enabled) or tri-state (disabled). This capability allows
multiple ports to be connected in a multi-drop bus and selectively polled.
Half-duplex two-wire communications are possible by connecting TX+ to RX+
and TX- to RX- in your cable hood. The enable to the driver is connected to
the UART Request To Send (RTS) line for RS-485 communications. This
allows the RS-485 driver to be tri-stated (disabled) when inactive on a multi-
drop polled network. The software that you are using must know how to
enable the driver when it is answering a poll. Setting this jumper wrong can cause
transmitter contention problems, thus preventing operation by any nodes on the network.
NOTE
To permanently enable the driver (normal RS-422 point-to-point mode),
remove E4 for Port 1 and E3 for Port 2.
11
CHAPTER 2: Introduction
Table 2-1. RS-422/485 Connector Pinouts: (J1 for Port 1, J2 for Port 2)
Signal Name Pin # Mode
TX+ Transmit Data Pos. 4 Output RS-422/485
TX- Transmit Data Neg. 3 Output RS-422/485
RTS+ Req. To Send Pos. 6 Output RS-422/485
RTS- Req. To Send Neg. 7 Output RS-422/485
GND Ground 5
RX+ Receive Data Pos. 1 Input RS-422/485
RX- Receive Data Neg. 2 Input RS-422/485
CTS+ Clear To Send Pos. 9 Input RS-422/485
CTS- Clear To Send Neg. 8 Input RS-422/485
Ce manuel convient aux modèles suivants
1
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