Black Box IC113C Manuale utente
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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, Lawrence, PA 15055-1018
MARCH 2000
IC113C
IC175C
Dual Port RS-232/422/485 Serial Interface
FCC AND IC STATEMENTS, TRADEMARKS
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 la classe A prescrites dans le Règlement sur le
brouillage radioélectrique publié par Industrie Canada.
TRADEMARKS USED IN THIS MANUAL
AT and IBM are registered trademarks, and XT is a trademark of
International Business Machines Corporation.
Any other trademarks mentioned in this manual are acknowledged to be the property
of the trademark owners.
DUAL PORT RS-232↔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 parato 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.
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 equio 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.
DUAL PORT RS-232↔422/485 SERIAL INTERFACE
Contents
Chapter Page
1. Specifications...................................................................................................1
2. Introduction ....................................................................................................2
2.1 Overview..................................................................................................2
2.2 What’s Included......................................................................................2
2.3 Features ...................................................................................................3
2.4 Technical Description ............................................................................4
3. Address Selection............................................................................................6
4. Option Selection .............................................................................................7
4.1 Port Enable/Disable...............................................................................7
4.2 RS-232 Interface Options .......................................................................9
4.3 RS-422/485 Interface Options.............................................................10
4.4 Line Termination .................................................................................11
5. Installation.....................................................................................................12
Appendix: Circuit-Board Design.......................................................................14
1
CHAPTER 1: Specifications
Protocol — Asynchronous
Speed — IC113C: Up to 115.2 Kbps; IC175C: 460.8 kbps and higher
Operation — RS-232 or RS-485/422, 2- or 4-wire (individually selectable
on each port)
Connectors — (2) DB9M
Communications Chip — IC113C: 16550 UART; IC175C: 16950 UART
MTBF — >150,000 hours
MTTR — <0.25 hours
Materials — Boards are solder mask over bare copper or tin nickel
Operating Temperature — 32° to 122°F (0° to 50°C)
Storage Temperature — -4° to 158°F (-20° to 70°C)
Humidity — 0 to 90% relative humidity, noncondensing
Power — +5 VDC @ 195 mA ±12 V @ 25 mA (derived from PC bus)
Size — 5"W x 7.5 "D (12.7 x 19 cm)
Weight — 0.2 lb. (0.1 kg)
1. Specifications
2
DUAL PORT RS-232↔422/485 SERIAL INTERFACE
2.1 Overview
If you need to operate RS-232, RS-422, or RS-485 devices from your PC, use
the Dual Port RS-232/422/485 Serial Interface. Connect to any device that
uses the RS-232 interface, such as modems, data-entry terminals, and plotters.
This card allows you to configure two RS-232 ports, two RS-422/485 ports, or
one of each. The Dual Port RS-232/422/485 also features greater maximum
distance and allows multi-drop communications.
The card also includes a serial utility disk with Seacom, a DOS interrupt and
driver package. Seacom allows data to be buffered, eliminating data loss in
high-speed data transfers. It also allows more than 4 ports (256 max.) to be
configured and utilized under DOS.
The README file on the serial utility disk contains information about the
latest changes and revisions. To view this file, insert the diskette into drive A
or B and type A:TYPE READ.ME|MORE [ENTER] or B:TYPE
READ.ME|MORE [ENTER].
2.2 What’s Included
Your Serial Interface should come with the following items. If any of these
items are missing or damaged, contact Black Box at 724-746-5500.
(1) Dual Port RS-232/422/485 Serial Interface card,
(2) serial utility software diskettes: (1) for 32-bit Windows®,
(1) for DOS and Windows®3.1x,
This manual
2. Introduction
3
CHAPTER 2: Introduction
2.3 Features
Listed below are the special features your Serial Interface offers.
• Each port is independently addressable.
• Eleven interrupt options, including AT interrupts, for simple integration
into existing systems.
• IRQs (2 [9], 3, 4, 5, 6, 7, 10, 11, 12, and 15) supported.
• IRQs can be shared or individually set for each port.
• Supports Interrupt Sharing—only one interrupt line required for
multiple ports.
• Supports any character set defined by binary notation.
• 16550 UARTs on the IC113C help ensure against data loss. This chip
features programmable baud rate, data format, interrupt control, and a
16-byte FIFO. The IC175C uses 16950 UARTs, which feature a 128-byte
buffer for even better performance.
• Faster baud rates—up to 115.2 Kbps (IC113C) or 460.8 kbps and above
(IC175C).
• Addressable as COM1: through COM4: or any other address up
to 3FF Hex.
• Support for non-standard baud rates available. These baud rates (such as
31.25K or 76.8K baud) are supported by installing a different oscillator at
location Y1. Call Technical Support for more information.
4
DUAL PORT RS-232↔422/485 SERIAL INTERFACE
2.4 Technical Description
The Dual Port RS-232/422/485 Serial Interface utilizes the same 16550 UART
chip found in the IBM®asynchronous adapter. This chip features
programmable baud rate, data format, and interrupt control. Refer to the
IBM Technical Reference for details on programming the chip.
RS-232
The Dual Port RS-232/422/485 Serial Interface meets the RS-232C
specifications and provides an asynchronous serial I/O port. This is the
standard port configuration found in the IBM AT®computer, including the
DB9 style connector.
The table below shows the connector pinouts for ports J1 (port 1) and J2
(port 2) on the Interface while using RS-232.
Pin Number Signal Name Mode
3 Transmit Data (TD) Output RS-232
7 Request To Send (RTS) Output RS-232
4 Data Term Ready (DTR) Output RS-232
5 Ground (GND) ––––––––––––
2 Receive Data (RD) Input RS-232
1 Data Carrier Detect (DCD) Input RS-232
6 Data Set Ready (DSR) Input RS-232
8 Clear To Send (CTS) Input RS-232
9 Ring Indicator (RI) Input RS-232
RS-422
RS-422 allows very long distance communications—4000 feet (about
1219 meters) at 9600 baud—based on use of Category 3, UTP, or better, with
virtually error-free differential drive characteristics. 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.
5
CHAPTER 2: Introduction
RS-485
RS-485 is backward-compatible with RS-422; however, it is optimized for
multidrop 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 multidrop bus and selectively polled. Half-duplex
two-wire communications are possible by connecting TX+ to RX+ and TX- to
RX- in your cable connector. 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 multidrop
polled network. The software that you are using must “know how” to enable
the driver when it is answering a poll. Failure to set this jumper correctly can
cause transmitter contention problems, preventing operation by any nodes on
the network.
The table below shows the connector pinouts for ports J1 (port 1) and J2
(port 2) on the Interface while using RS-422/485.
Pin Number Signal Name Mode
4 Transmit Data Pos. (TX+) Output RS-422
3 Transmit Data Neg. (TX-) Output RS-422
6 Req. To Send Pos. (RTS+) Output RS-422
7 Req. To Send Neg. (RTS-) Output RS-422
5 Ground (GND) --------------------
1 Receive Data Pos. (RX+) Input RS-422
2 Receive Data Neg. (RX-) Input RS-422
9 Clear To Send Pos. (CTS+) Input RS-422
8 Clear To Send Neg. (CTS-) Input RS-422
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