MAY 2002
IC971C
RS-422/485/530
Single-Port PCI Card
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
1
FCC AND IC RFI STATEMENTS
FEDERAL COMMUNICATIONS COMMISSION
and INDUSTRY CANADA
RADIO FREQUENCY INTERFERENCE STATEMENTS
Class B Digital Device. This equipment has been tested
and found to comply with the limits for a Class B
computing device pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable
protection against harmful interference in a residential
installation. However, there is no guarantee that
interference will not occur in a particular installation.
This equipment generates, uses, and can radiate radio
frequency energy, and, if not installed and used in
accordance with the instructions, may cause harmful
interference to radio communications. If this
equipment does cause harmful interference to radio or
telephone reception, which can be determined by
turning the equipment off and on, the user is
encouraged to try to correct the interference by one of
the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment
and receiver.
2
RS-422/485/530 SINGLE-PORT PCI CARD
• Connect the equipment into an outlet on a circuit
different from that to which the receiver is
connected.
• Consult an experienced radio/TV technician for
help.
CAUTION
Changes or modifications not expressly approved by the
party responsible for compliance could void the user’s
authority to operate the equipment.
To meet FCC requirements, shielded cables and power
cords are required to connect this device to a personal
computer or other Class B certified device.
This digital apparatus does not exceed the Class B 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 B prescrites dans le Règlement sur le
brouillage radioélectrique publié par Industrie Canada.
3
EU DECLARATION OF CONFORMITY
EUROPEAN UNION DECLARATION OF CONFORMITY
This equipment complies with the requirements of the
European EMC Directive 89/336/EEC.
4
RS-422/485/530 SINGLE-PORT PCI CARD
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.
5
NOM STATEMENT
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.
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
RS-422/485/530 SINGLE-PORT PCI CARD
TRADEMARKS USED IN THIS MANUAL
OS/2 and PS/2 are registered trademarks of
International Business Machines Corporation.
Windows and Windows NT are either registered
trademarks or trademarks of Microsoft Corporation in
the United States and/or other countries.
Any other trademarks mentioned in this manual are
acknowledged to be the property of the trademark owners.
7
CONTENTS
Contents
Chapter Page
1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 What the Package Includes . . . . . . . . . . . . 11
2.3 Factory-Default Settings. . . . . . . . . . . . . . . 11
2.4 Technical Description . . . . . . . . . . . . . . . . 11
2.5 RS-422/485/530 DB25 Male DTE
Connector Pin Assignments. . . . . . . . . . 12
3. Card Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 RS-485 Enable Modes . . . . . . . . . . . . . . . . 13
3.2 Clock Modes. . . . . . . . . . . . . . . . . . . . . . . . 15
3.2.1 RS-485 Mode and Clock Mode
Examples (Switch SW2) . . . . . . . 16
3.2.2 Baud Rates and Divisors
for D1 Mode . . . . . . . . . . . . . . . . . 17
3.3 Address and IRQ Selection . . . . . . . . . . . . 18
3.4 Line Termination. . . . . . . . . . . . . . . . . . . . 18
8
RS-422/485/530 SINGLE-PORT PCI CARD
Contents (continued)
Chapter Page
4. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.1 Operating System Installation. . . . . . . . . . 20
4.1.1 For Windows Users . . . . . . . . . . . . . 20
4.1.2 Other Operating Systems. . . . . . . . 20
4.2 System Installation . . . . . . . . . . . . . . . . . . . 20
Appendix A. Troubleshooting. . . . . . . . . . . . . . . . . 22
A.1 Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
A.2 Calling Black Box. . . . . . . . . . . . . . . . . . . . 23
A.3 Shipping and Packaging . . . . . . . . . . . . . . 24
Appendix B. Electrical Interfaces . . . . . . . . . . . . . . 25
B.1 RS-422 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
B.2 RS-485 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
B.3 RS-530 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Appendix C. Asynchronous Communication. . . . . 28
Appendix D. Board Layout . . . . . . . . . . . . . . . . . . . 31
9
CHAPTER 1: Specifications
1. Specifications
UART: 16850
Connector: (1) DB25 male
Interface: RS-422/485/530
Temperature Tolerance: Operating: 32 to 122°F (0 to
50°C); Storage: -4 to +158°F (-20 to +70°C)
Relative Humidity: 10 to 90%, noncondensing
MTBF: Greater than 150,000 hours (calculated)
Power: +5 VDC, 480 mA
Size: 2.5"H x 4.9"W (6.3 x 12.5 cm), excluding
goldfingers; 2.8"H x 4.9"W (7.1 x 12.5 cm), including
goldfingers
Weight: 2.8 oz. (79.4 g)
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RS-422/485/530 SINGLE-PORT PCI CARD
2. Introduction
2.1 Overview
The RS-422/485/530 Single-Port PCI Card is a onechannel PCI Bus serial I/O adapter. It provides one
field-selectable RS-422/485/530 serial port that supports
asynchronous data rates up to 460.8 kbps.
Choose the RS-422 mode for long-distance device
connections up to 4000 ft. (1219.2 m) where noise
immunity and high data integrity are essential. Select
RS-485 and capture data from multiple peripherals in a
RS-485 multi-drop network. Up to 31 RS-485 devices can
be connected to each port to automate your data
collection.
In RS-485 mode, our special auto-enable feature allows
the RS-485 ports to be viewed by the operating system as
a COM: port. This means that the standard COM: driver
can be used for RS-485 communications. Our on-board
hardware automatically handles the RS-485 driver
enable.
11
CHAPTER 2: Introduction
2.2 What the Package Includes
The PCI Card is shipped with the following items.
• (1) RS-422/485/530 Single-Port PCI Card.
• (1) Serial Utilities Software CD-ROM disk
containing drivers for Windows
®
3.1x/95/98/2000
and Windows NT
®
, Advanced COM drivers,
utilities, INF files, help files, and this users’ manual
in PDF format.
If either item is missing or damaged, contact Black Box
at 724-746-5500.
2.3 Factory-Default Settings
When shipped from the factory, the PCI Card’s DB25
port is configured as RS-530.
2.4 Technical Description
The PCI Card provides an additional asynchronous
serial port, field-selectable as RS-422/485/530 for
industrial automation and control applications.
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RS-422/485/530 SINGLE-PORT PCI CARD
The Card uses a 16850 UART. This chip features
programmable baud rates, data format, interrupt
control, and an industry-leading 128-byte FIFOs.
2.5 RS-422/485/530 DB25 Male DTE Connector Pin
Assignments
Signal Name Pin # Mode
G ND Ground 7 —
RDB RX+ Receive Positive 16 Input
RDA RX- Receive Negative 3 Input
CTSB CTS+ Clear To Send Positive 13 Input
CTSA CTS- Clear To Send Negative 5 Input
TDB TX+ Transmit Positive 14 Output
TDA TX- Transmit Negative 2 Output
RTSB RTS+ Request To Send Positive 19 Output
RTSA RTS- Request To Send Negative 4 Output
NOTE
These pin assignments meet the EIA/TIA/ANSI-530 DTE
standard.
13
CHAPTER 3: Card Setup
3. Card Setup
3.1 RS-485 Enable Modes
RS-485 is ideal for multi-drop or network environments.
RS-485 requires a tri-state driver that will allow the
electrical presence of the driver to be removed from the
line. The driver is in a tri-state or high impedance
condition when this occurs. Only one driver may be
active at a time and the other driver(s) must be tristated. The output modem control signal Request To
Send (RTS) is typically used to control the state of the
driver. Some communication software packages refer to
RS-485 as RTS enable or RTS block mode transfer.
One of the unique features of the RS-422/485/530
Single-Port PCI Card is the ability to be RS-485
compatible without the need for special software or
drivers. This ability is especially useful in Windows and
OS/2
®
environments where the lower-level I/O control
is abstracted from the application program. This ability
means that you can effectively use the PCI Card in an
RS-485 application with existing (that is, standard
RS-232) software drivers.
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RS-422/485/530 SINGLE-PORT PCI CARD
Switch SW2 is used to control the RS-485 mode
functions for the driver circuit. The selections are:
• Auto Enable (silk-screen “AT”). The Auto Enable
feature automatically enables/disables the RS-485
interface via on-board circuitry.
• RTS Enable (silk-screen “RT”). The RTS mode
uses the RTS modem control signal to enable the
RS-485 interface and provides backward
compatibility with existing software products.
• No Echo (silk-screen “NE”) is used to control the
RS-485 enable/disable functions for the receiver
circuit and determine the state of the RS-422/485
driver. The RS-485 Echo is the result of
connecting the receiver inputs to the transmitter
outputs. Every time a character is transmitted, it is
also received. This can be beneficial if the software
can handle echoing (that is, using received
characters to throttle the transmitter) or it can
confuse the system if the software does not. To
select the No Echo mode, choose silk-screen
position NE.
15
CHAPTER 3: Card Setup
3.2 Clock Modes
The RS-422/485/530 Single-Port PCI Card uses a
unique clocking option that allows the end user to select
from “divide by 4” and “divide by 1” clocking modes.
SW2 positions 1 and 2 select the divide by 1 (silk-screen
“D1”) and divide by 4 (silk-screen “D4”) modes. (See
Appendix D for SW2’s location.)
To select the baud rates commonly associated with
COM: ports (that is, 2400, 4800, 9600, 19.2, …
115.2 kbps), set switch SW2 in the divide by 4 mode
(silk-screen “D4”).
To select the maximum data rate up to 460.8 kbps, set
switch SW2 in the divide by 1 (silk-screen “D1”) position.
Please refer to Table 3-1 on page 17 for these additional
data rates.
CAUTION
Do not set both switches ON or invalid clocking will occur.
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RS-422/485/530 SINGLE-PORT PCI CARD
3.2.1 RS-485 M
ODE ANDCLOCKMODEEXAMPLES
(S
WITCH
SW2)
Figure 3-1. Switch SW2, RS-422, Divide by 4.
Figure 3-2. Switch SW2, RS-485 Auto Enabled,
with No Echo Divide by 4.
Figure 3-3. Switch SW2, RS-485 Auto Enabled, with Echo Divide by 4.
D D A R N
1 4 T T E
D D A R N
1 4 T T E
D D A R N
1 4 T T E
17
CHAPTER 3: Card Setup
3.2.2 B
AUDRATES ANDDIVISORS FOR
D1 M
ODE
Table 3-1 shows some common data rates and the rates
you should choose to match them if using the PCI Card
in D1 mode.
Table 3-1. Baud rates for D1 mode.
For this Data Rate Choose this Data Rate
1200 bps 300 bps
2400 bps 600 bps
4800 bps 1200 bps
9600 bps 2400 bps
19.2 kbps 4800 bps
57.6 kbps 14.4 kbps
115.2 kbps 28.8 kbps
230.4 kbps 57.6 kbps
460.8 kbps 115.2 kbps
If your communications package allows the use of baud
rate divisors, choose the appropriate divisor from
Table 3-2 on the next page.
18
RS-422/485/530 SINGLE-PORT PCI CARD
Table 3-2. Divisors for D1 mode.
For this Data Rate Choose this Divisor
1200 bps 384
2400 bps 192
4800 bps 96
9600 bps 48
19.2 kbps 24
38.4 kbps 12
57.6 kbps 8
115.2 kbps 4
230.4 kbps 2
460.8 kbps 1
3.3 Address and IRQ Selection
The PCI Card is automatically assigned resources by
your motherboard BIOS. Only the I/O address may be
modified by you.
Adding or removing other hardware may change the
assignment of I/O addresses and IRQs.
3.4 Line Termination
Typically, each end of the RS-485 bus must have lineterminating resistors (RS-422 terminates at the receive
end only). A 120-ohm resistor is across each RS-422/485
input in addition to a 1K-ohm pull-up/pull-down
combination that biases the receiver inputs. Switch SW1
19
CHAPTER 3: Card Setup
allows customization of this interface to specific
requirements. Each switch position corresponds to a
specific portion of the interface. If multiple PCI Cards
are configured in an RS-485 network, only the boards on
each end should have switches T, P, and P ON. Refer to
Table 3-3 for each position’s operation:
Table 3-3. Switch positions for line termination.
Name Function
T Adds or removes the 120 ohm termination.
P Adds or removes the 1K ohm pull-down resistor in the RS-
422/RS-485 receiver circuit (Receive data only).
P Adds or removes the 1K ohm pull-up resistor in the RS-
422/RS-485 receiver circuit (Receive data only).
L Connects the TX+ to RX+ for RS-485 two-wire operation.
L Connects the TX- to RX- for RS-485 two-wire operation.
Figure 3-4. Switch SW1, Line Termination.
P P T L L
20
RS-422/485/530 SINGLE-PORT PCI CARD
4. Installation
4.1 Operating System Installation
4.1.1 F
ORWINDOWSUSERS
Start by choosing Install Software at the beginning of
the CD. Choose Asynchronous COM: Port Software,
SeaCOM.
4.1.2 O
THER
O
PERATINGSYSTEMS
Refer to the appropriate section of the Serial Utilities
Software.
4.2 System Installation
The RS-422/485/530 Single-Port PCI Card can be
installed in any of the PCI expansion slots and contains
several jumper straps for each port that must be set for
proper operation.
1. Turn off PC power. Disconnect the power cord.
2. Remove the PC case cover.
3. Locate an available PCI slot and remove the blank
metal slot cover.
21
CHAPTER 4: Installation
4. Gently insert the PCI Card into the slot. Make sure
that the adapter is seated properly.
5. Replace the screw.
6. Replace the cover.
7. Connect the power cord.
Installation is complete.
22
RS-422/485/530 SINGLE-PORT PCI CARD
Appendix A: Troubleshooting
A.1 Tips
Using the supplied software and following these simple
steps can eliminate most common problems.
1. Identify all I/O adapters currently installed in
your system. This includes your on-board serial
ports, controller cards, sound cards, etc. The I/O
addresses used by these adapters, as well as the
IRQ (if any) should be identified.
2. Configure your PCI Card so that there is no
conflict with currently installed adapters. No two
adapters can occupy the same I/O address.
3. Make sure the PCI Card is using a unique IRQ.
While the PCI Card does allow the sharing of
IRQs, many other adapters (that is, SCSI adapters
and on-board serial ports) do not. The IRQ is
typically selected via an on-board header block.
Refer to the Chapter 3 for help in choosing an
I/O address and IRQ.
4. Make sure the PCI Card is securely installed in a
motherboard slot.
23
APPENDIX A: Troubleshooting
5. When running DOS or Windows 3.x, refer to the
supplied software and this manual to verify that
the PCI Card is configured correctly. This software
contains an easy-to-use diagnostic program
(
SSD)
that will verify if a card is configured properly.
6. For Windows 95/98/Me/2000 or Windows NT,
the diagnostic tool
“
WinSSD” is installed in the
SeaCOM folder on the Start Menu during the
setup process. First find the ports using the Device
Manager, then use
“
WinSSD” to verify that the
ports are functioning.
7. Always use the diagnostic software when
troubleshooting a problem. This will eliminate any
software issues.
If none of the above steps solved the problem, please
refer to Section A.2.
A.2 Calling Black Box
If you determine that your RS-422/485/530 Single-Port
PCI Card is malfunctioning, do not attempt to alter or
repair the unit. It contains no user-serviceable parts.
Contact Black Box at 724-746-5500.
24
RS-422/485/530 SINGLE-PORT PCI CARD
Before you do, make a record of the history of the
problem. We will be able to provide more efficient and
accurate assistance if you have a complete description,
including:
• the nature and duration of the problem.
• when the problem occurs.
• the components involved in the problem.
• any particular application that, when used,
appears to create the problem or make it worse.
A.3 Shipping and Packaging
If you need to transport or ship your RS-422/485/530
Single-Port PCI Card:
• Package it carefully. We recommend that you use
the original container.
• If you are shipping the RS-422/485/530
Single-Port PCI Card for repair, make sure you
include everything that came in the original
package. Before you ship, contact Black Box to get
a Return Authorization (RA) number.
25
APPENDIX B: Electrical Interfaces
Appendix B. Electrical Interfaces
B.1 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. On a differential interface, logic levels are
defined by the difference in voltage between a pair of
outputs or inputs. In contrast, a single-ended interface
(such as RS-232) defines the logic levels as the
difference in voltage between a single signal and a
common ground connection. Differential interfaces are
typically more immune to noise or voltage spikes that
may occur on the communication lines. Differential
interfaces also have greater drive capabilities that allow
for longer cable lengths. RS-422 is rated up to 10 Mbps
and can have cabling 4000 feet (1219.2 m) long. RS-422
also defines driver and receiver electrical characteristics
that will allow one driver and up to 32 receivers on the
line at once. RS-422 signal levels range from 0 to +5
volts. RS-422 does not define a physical connector.
26
RS-422/485/530 SINGLE-PORT PCI CARD
B.2 RS-485
RS-485 is backwardly 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. RS-485 allows cable lengths
up to 4000 feet (1219.2 m) and data rates up to
10 Mbps. The signal levels for RS-485 are the same as
those defined by RS-422. RS-485 has electrical
characteristics that allow for 32 drivers and 32 receivers
to be connected to one line. This interface is ideal for
multi-drop or network environments. RS-485 tri-state
driver (not dual-state) will allow the electrical presence
of the driver to be removed from the line. Only one
driver may be active at a time and the other driver(s)
must be tri-stated. RS-485 can be cabled in two ways:
two-wire and four-wire mode. Two-wire mode does not
allow for full-duplex communication, and requires that
data be transferred in only one direction at a time. For
half-duplex operation, the two transmit pins should be
connected to the two receive pins (Tx+ to Rx+ and Txto Rx-). Four-wire mode allows full-duplex data transfers.
27
APPENDIX B: Electrical Interfaces
RS-485 does not define a connector pinout or a set of
modem control signals. RS-485 does not define a
physical connector.
B.3 RS-530
RS-530 (or EIA-530) compatibility means that RS-422
signal levels are met, and the pinout for the DB25
connector is specified. The EIA (Electronic Industry
Association) created the RS-530 specification to detail
the pinout, and define a full set of modem control
signals that can be used for regulating flow control and
line status. The RS-530 specification defines two types of
interface circuits: Data Terminal Equipment (DTE) and
Data Circuit-Terminating Equipment (DCE). The PCI
Card is a DTE interface.
28
RS-422/485/530 SINGLE-PORT PCI CARD
Appendix C. Asynchronous
Communication
Serial data communication implies that individual bits of
a character are transmitted consecutively to a receiver
that assembles the bits back into a character. Data rate,
error checking, handshaking, and character framing
(start/stop bits) are pre-defined and must correspond at
both the transmitting and receiving ends.
Asynchronous communication is the standard means of
serial data communication for PC compatibles and
PS/2
®
computers. The original PC was equipped with a
communication (COM:) port that was designed around
an 8250 Universal Asynchronous Receiver Transmitter
(UART). This device allows asynchronous serial data to
be transferred through a simple and straightforward
programming interface. A start bit, followed by a predefined number of data bits (5, 6, 7, or 8) defines
character boundaries for asynchronous communication.
The end of the character is defined by the transmission
of a pre-defined number of stop bits (usually 1, 1.5, or
2). An extra bit used for error detection is often
appended before the stop bits.
29
APPENDIX C: Asynchronous Communication
Figure C-1.Asynchronous communication bit diagram.
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. There are several
methods for implementing a parity check to guard
against data corruption. Common methods are called
(E)ven Parity or (O)dd Parity. Sometimes parity is not
used to detect errors on the data stream. This is referred
to as (N)o parity. Because each bit in asynchronous
communication is sent consecutively, it is easy to
generalize asynchronous communication by stating that
each character is wrapped (framed) by pre-defined bits
to mark the beginning and end of the serial
transmission of the character. The data rate and
communication parameters for asynchronous
communication have to be the same at both the
30
RS-422/485/530 SINGLE-PORT PCI CARD
transmitting and receiving ends. The communication
parameters are baud rate, parity, number of data bits
per character, and stop bits (that is, 9600, N, 8, 1).
31
APPENDIX D: Board Layout
Appendix D. Board
Layout
2.5" (6.3 cm)
4.9" (12.5 cm)
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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