Black Box EHN250-0050 User manual

APRIL 1998
AC250A AC254A AC258A EHN250-0100
AC251A AC255A AC259A EHN250-0150
AC252A AC256A PS255A EHN250-0200
AC253A AC257A EHN250-0050
Station Extenders
Station Extender Power Supply
Station Extender Cable
CUSTOMER 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 [phone]
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]
STATION
EXTENDERS

2
STATION EXTENDERS
TRADEMARKS USED IN THIS MANUAL
PS/2 is a registered trademark of IBM Corporation.
Any other trademarks mentioned in this manual are
acknowledged to be the property of the trademark owners.

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STATION EXTENDERS
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 communi-
cation. 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.

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STATION EXTENDERS
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.

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STATION EXTENDERS
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.

STATION EXTENDERS
Indicators (1) Green Power LED
Connectors AC250A:
LINK: DB25M
Computer: DB25F
AC251A:
LINK: DB25M
Keyboard-Monitor-Mouse: DB25F
AC252A:
LINK: DB25M
ServSwitch: DB25M
Operating
Temperature 32° to 131°F (0° to 55°C)
Humidity Up to 85%, noncondensing
Altitude Up to 10,000 feet (3048 m)
6
1. Specifications

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STATION EXTENDERS
Power AC250A: 5 VDC, 50 mA from CPU;
AC251A: 5 VDC, 1000 mA from
transformer;
AC252A: 9 VDC, 50 mA from
ServSwitch;
PS255A: 100 to 240 VAC, 50-60 Hz
Size AC250A, AC251A, AC252A:
2.5"H x 2.1"W x 0.6"D
(6.4 x 5.3 x 1.5 cm)
Weight AC250A, AC251A, AC252A: 2 oz.
(56.7 g);
AC254A, AC258A: 2 lb. (0.9 kg);
AC253A, AC255A, AC257A,
AC259A: 3 lb. (1.4 kg);
AC256A: 1 lb. (0.5 kg)

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STATION EXTENDERS
2.1 Description
Your Station Extender package includes two Station
Extender units and this manual. There may also be
an autosensing power adapter (PS255A) and CPU
or keyboard cables, depending on which model you
have ordered. The Station Extenders connect to
each other with a LINK cable (part number
EHN250-xxxx). This cable is purchased separately
and is required for installation.
Station Extenders work in pairs, and can be thought
of as a transmitter unit and a receiver unit connected
by a single cable. Each unit plugs into one end of the
equipment to be interconnected. The two units are
then connected with the LINK cable. The Station
Extender units are truly plug-and-play. Once
connected to the equipment, the extender system
acts like a regular cable. There are no user
installation steps other than connecting the units.
The figure on the next page shows the Station
Extender. There are 3 types of Station Extenders.
AC250A is used on the CPU side. AC251A is used
2. Introduction

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STATION EXTENDERS
on the keyboard side. AC252A (pictured below) is
used with ServSwitches. There is a DB25 connector at
each end of the Station Extender. One end is always
a male connector and is marked LINK CABLE. The
LINK cable is always a female-to-female cable and
connects to this end. The other DB25 connector is
either male or female, depending on the model. It
connects to your equipment through a cable or
directly to a ServSwitch.
DB25 Connector
(Female on AC250A
and AC251A, Male
on AC252A)
DB25 Connector
(Always male on
the link side)
Power Jack
(AC251A only)
Power LED

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STATION EXTENDERS
AC250A has a female connector at the equipment
end marked COMPUTER. AC251A has a female
connector at the equipment end marked
KEYBOARD-MONITOR-MOUSE. AC252A has
a male connector at the equipment end marked
SERVSWITCH. The genders of the connectors
have been chosen to make it difficult to connect
the system incorrectly.
The green LED on the side of the unit lights when
the Station Extender is receiving power. When used
with ServSwitches, which indicate CPU power on
the front of the switch, the power state of the CPU
is passed through correctly, regardless of whether the
Station Extender is powered on or not. AC251A has a
power jack on it for connecting a transformer, which
powers the keyboard and mouse.
The units are most commonly sold as kits with any
cables or transformers bundled in (see Section 2.3).
The LINK cable is always sold separately.
Transformer power cords are also purchased
separately—call Black Box.
There are four applications for the Station Extender
(see Chapter 3). Connect the Station Extenders and
cables as shown in the proper diagram.

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STATION EXTENDERS
2.2 Features
•Extends PC keyboard, mouse, and monitor
up to 200 feet (60.9 m) from computer.
•Supports both PS/2®and RS-232 mice.
•Direct connect to switches such as ServSwitch
(part numbers SW721A-R2 through SW725A-R2)
or ServMaster (part number SW990A or
SW990AE).
•Supports up to 1280 x 1024 video.
•Small and application-transparent.
2.3 Models Available
The three basic units are:
AC250A Station Extender-PC
(for the CPU side)
AC251A Station Extender-K/V/M
(for the keyboard side)
AC252A Station Extender-SW
(for the ServSwitch side)

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STATION EXTENDERS
The kits available are:
AC253A Station Extender PC-K/V/SM
(CPU to Keyboard-Monitor-
RS-232 Mouse)
AC254A Station Extender PC-SW-SM
(CPU to ServSwitch for RS-232 Mouse)
AC255A Station Extender SW-K/V/SM
(ServSwitch to Keyboard-Monitor-
RS-232 Mouse)
AC256A Station Extender SW-SW
(ServSwitch to ServSwitch)
AC257A Station Extender PC-K/V/PS2M
(CPU to Keyboard-Monitor-
PS/2 Mouse)
AC258A Station Extender PC-SW/PS2M
(CPU to ServSwitch for PS/2 Mouse)
AC259A Station Extender SW-K/V/PS2M
(ServSwitch to Keyboard-Monitor-
PS/2 Mouse)
The power supply available is:
PS255A Station Extender Power Supply

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STATION EXTENDERS
The cables available for the link side are:
EHN250-0050 Station Extender Cable, 50 ft.
EHN250-0100 Station Extender Cable, 100 ft.
EHN250-0150 Station Extender Cable, 150 ft.
EHN250-0200 Station Extender Cable, 200 ft.
EHN250-0250 Station Extender Cable, 250 ft.
The cables available for the computer side are:
EHN048 VGA/AT/Serial
EHN049 EGA/AT/Serial
EHN051 VGA/PS2/PS2
The cables available for the
keyboard/monitor/mouse side are:
EHN052 VGA/AT/Serial
EHN053 EGA/AT/Serial
EHN054 VGA/PS2/PS2

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STATION EXTENDERS
3.1 CPU to Keyboard-Monitor-Mouse
This installation requires the parts shown in the table
on the next page. The LINK cable is also required
for installation and is purchased separately. Connect
the parts together as shown in Figure 3-1.
The units are most often sold as kits. Kit part number
AC257A is for PS/2 mice. It contains items 1, 2, 3a,
4a, and 5.
Kit part number AC253A is for RS-232 mice. It
contains items 1, 2, 3b, 4b, and 5.
3. Installation

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STATION EXTENDERS
ITEM PART NUMBER DESCRIPTION
1 AC250A Station Extender used on CPU side.
2 AC251A Station Extender used on keyboard
side.
3a EHN051 (PS/2 mouse) CPU adapter cable used to connect
or CPU to AC250A.
3b EHN048 (RS-232 mouse)
4a EHN054 (PS/2 mouse) Keyboard-monitor-mouse adapter cable
or used to connect keyboard, monitor, and
4b EHN052 (RS-232 mouse) mouse to AC251A.
5 PS255A (100 VAC) Power transformer (5 VDC) used on
or keyboard side.
PS255A (240 VAC)
6 EHN250-xxxx, where xxxx is Link cable to interconnect AC250A
the length of cable in feet and AC251A.

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STATION EXTENDERS
Figure 3-1. Station Extender Connection—
CPU to Keyboard-Monitor-Mouse.
Power
transformer
5 VDC
LINK Cable
(EHN250-XXXX)
Keyboard/monitor/
mouse adapter cable
CPU adapter
cable
AC251A
AC250A

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STATION EXTENDERS
3.2 ServSwitch to Keyboard-Monitor-Mouse
This installation requires the parts shown in the
table below. The LINK cable is also required for
installation and is purchased separately. Connect
the parts together as shown in Figure 3-2.
The units are most often sold as kits. Kit part number
AC259A is for PS/2 mice. It contains items 1, 2, 3a,
and 4.
Kit part number AC255A is for RS-232 mice. It
contains items 1, 2, 3b, and 4.
ITEM PART NUMBER DESCRIPTION
1 AC252A Station Extender used on switch side.
2 AC251A Station Extender used on keyboard
side.
3a EHN054 (PS/2 mouse) Keyboard-monitor-mouse adapter cable
or used to connect keyboard, monitor, and
3b EHN052 (RS-232 mouse) mouse to AC251A.
4 PS255A (100 VAC) Power transformer (5 VDC) used on
or keyboard side.
PS255A (240 VAC)
5 EHN250-xxxx, where xxxx is Link cable to interconnect AC252A
the length of cable in feet and AC251A.

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STATION EXTENDERS
Figure 3-2. Station Extender Connection—
ServSwitch to Keyboard-Monitor-Mouse.
Power
transformer
5 VDC
LINK Cable
(EHN250-XXXX)
ServSwitch
Keyboard/monitor/
mouse adapter cable
AC252A
AC251A

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STATION EXTENDERS
3.3 CPU to ServSwitch
This installation requires the parts shown in the
table below. The LINK cable is also required for
installation and is purchased separately. Connect
the parts together as shown in Figure 3-3.
The units are most often sold as kits. Kit part number
AC258A is for PS/2 mice. It contains items 1, 2, and
3a.
Kit part number AC254A is for RS-232 mice. It
contains items 1, 2, and 3b.
ITEM PART NUMBER DESCRIPTION
1 AC250A Station Extender used on CPU side.
2 AC252A Station Extender used on switch side.
3a EHN051 (PS/2 mouse) CPU adapter cable used to connect
or CPU to AC250A.
3b EHN048 (RS-232 mouse)
4 EHN250-xxxx, where xxxx is Link cable to interconnect AC250A
the length of cable in feet and AC252A.

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STATION EXTENDERS
Figure 3-3. Station Extender Connection—CPU to ServSwitch.
CPU adapter cable
LINK Cable
(EHN250-XXXX)
ServSwitch
AC250A
AC252A