Black Box ACU1007A User manual

APRIL 2002
ACU1007A
Interconnect
Remote Module
Interconnect
Local Module
To CPU
PS2MIC-1M2
FREE tech support 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone].
Mailing address: Black Box Corporation, 1000 Park Dr., Lawrence, PA 15055-1018
World-Wide Web: www.blackbox.com • E-mail: [email protected]
© Copyright 2002. Black Box Corporation. All rights reserved.
Customer Support Information:

1
THE SERVSWITCH™ FAMILY
Welcome to the ServSwitchTM Family!
Thank you for purchasing a BLACK BOX®ServSwitch™Brand CAT5 Extender
model! We appreciate your business, and we think you’ll appreciate the many ways
that your enhanced keyboard/video/mouse system will save you money, time, and
effort.
That’s because our ServSwitch family is all about breaking away from the
traditional, expensive model of computer management. You know, the one-size-
fits-all-even-if-it-doesn’t model that says, “One computer gets one user station, no
more, no less.” Why not a single user station (monitor, keyboard, and mouse) for
multiple computers—even computers of different platforms? Why not a pair of
user stations, each of which can control multiple computers? Why not multiple
user stations for the same computer?
With our ServSwitch products, there’s no reason why not. We carry a broad line
of robust solutions for all these applications. Do you have just two PCs, and need
an economical alternative to keeping two monitors, keyboards, and mice on your
desk? Or do you need to share dozens of computers, including a mix of IBM®PC,
RS/6000®, Apple®Macintosh®, Sun Microsystems®, and SGI®compatibles among
multiple users with different access levels? Does your switch have to sit solidly on a
worktable and use regular everyday cables? Or does it have to be mounted in an
equipment rack and use convenient many-to-one cables? No matter how large or
small your setup is, no matter how simple or how complex, we’re confident we
have a ServSwitch system that’s just right for you.
The ServSwitch™family from Black Box—the one-stop answer for all your KVM-
switching needs!
*
This manual will tell you all about your new ServSwitch™ Brand CAT5 PS/2
Micro Extender, including how to install, operate, and troubleshoot it. For an
introduction to the Extender, see Chapter 2. The Extender product code covered
in this manual is:
ACU1007A
Document PS2MIC-1M2

2
SERVSWITCH™ BRAND PS/2 MICRO EXTENDER
TRADEMARKS USED IN THIS MANUAL
BLACK BOX and the logo are registered trademarks, and ServSwitch, Matrix
ServSwitch, ServSwitch Affinity, ServSwitch Duo, ServSwitch Multi, ServSwitch
Ultra, ServSwitch Wizard, ServSwitch Wizard Pro, ServManager, ServSelect, and
ServShare are trademarks, of Black Box Corporation.
Apple and Macintosh are registered trademarks of Apple Computer, Inc.
AT&T is a registered trademark of AT&T.
Pentium is a registered trademark of Intel Corporation.
IBM, PC/AT, PS/2, and RS/6000 are registered trademarks, and PC/XT is a
trademark, of International Business Machines Corporation.
Microsoft, IntelliMouse, Windows, Windows Me, Windows NT, and Windows XP
are registered trademarks or trademarks of Microsoft Corporation in the United
States and/or other countries.
Sun Microsystems is a registered trademark of Sun Microsystems, Inc. in the
United States and other countries.
Any other trademarks mentioned in this manual are acknowledged to be the property of the
trademark owners.

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.
Shielded PC-equipment cables must be used with this equipment to maintain
compliance with radio frequency energy emission regulations and ensure a suitably
high level of immunity to electromagnetic disturbances.
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.
FCC/IC STATEMENTS

4
SERVSWITCH™ BRAND PS/2 MICRO EXTENDER
EUROPEAN UNION DECLARATION OF CONFORMITY
WARNING!
This is a class A product. In a domestic environment, this product might
cause radio interference, in which case the user might be required to
take adequate remedial measures.
This product complies with the following harmonized standards:
• EN55022 (1994), EN55024 (1998)
• EN61000-3-2 (1995), EN61000-3-3 (1995), EN60950 (2000)
When you use this product in environments that have high levels of
electromagnetic interference, you might experience some slight disturbance in its
operation. If this occurs, please refer to the Troubleshooting chapter of this
manual or call technical support.
To maintain compliance, use only cables supplied (or recommended) for use
with this product.

5
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.
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.
NOM STATEMENT

6
SERVSWITCH™ BRAND PS/2 MICRO EXTENDER
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.

7
TABLE OF CONTENTS
Contents
Chapter Page
1. Quick Start Guide ...................................................................................... 9
2. Specifications ........................................................................................... 10
3. Introduction ............................................................................................. 12
3.1 Compatibility ..................................................................................... 13
3.2 Key Features ...................................................................................... 14
4. Checklist of System Components ............................................................ 15
4.1 The Complete Package ..................................................................... 15
4.2 The Cables You’ll Need .................................................................... 15
4.2.1 To Connect a CPU to the Local Unit .................................... 16
4.2.2 To Connect a ServSwitch Family KVM Switch to the
Local Unit ............................................................................. 16
4.2.3 To Connect a Keyboard and Mouse to the Remote Unit ..... 18
4.2.4 To Connect a ServSwitch Family KVM Switch to the
Remote Unit ......................................................................... 18
4.2.5 To Connect the Local Unit to the Remote Unit ................... 20
5. Installation ................................................................................................ 21
5.1 Test-Placing the Extender System (Optional) ................................ 21
5.2 Attaching Devices .............................................................................. 21
5.2.1 Attaching a CPU to the Local Unit ........................................ 22
5.2.2 Attaching a ServSwitch Family KVM Switch to the
Local Unit ............................................................................. 22
5.2.3 Attaching a Keyboard and Mouse to the Remote Unit ........ 24
5.2.4 Attaching a ServSwitch Family KVM Switch to the
Remote Unit .......................................................................... 24
5.3 Finishing Your Installation ............................................................... 26
6. Operation ................................................................................................. 27
6.1 Keyboard and Mouse Emulation ..................................................... 27
6.2 Normal Operation and Keyboard Typematic Rate ......................... 27

8
SERVSWITCH™ BRAND PS/2 MICRO EXTENDER
Contents (continued)
Chapter Page
7. Troubleshooting ...................................................................................... 28
7.1 Common Problems ........................................................................... 28
7.1.1 Keyboard .................................................................................. 28
7.1.2 Mouse ....................................................................................... 29
7.1.3 Both Keyboard and Mouse ..................................................... 30
7.2 General Questions About the Extender .......................................... 31
7.3 Calling Black Box .............................................................................. 32
7.4 Shipping and Packaging ................................................................... 32
Appendix: Cable Pinning/Pairing ................................................................. 33

9
CHAPTER 1: Quick Start Guide
1. Quick Start Guide
To install your ServSwitch™ Brand CAT5 PS/2 Micro Extender system, refer to the
illustration below. A basic installation with a CPU, a keyboard, and a mouse is
shown.
1. Use the included PS/2 extension cables to attach the CPU to the Local Unit.
2. Plug the remote keyboard and mouse directly into the Remote Unit.
3. Connect the Local and Remote Units with straight-pinned four-pair solid-core
CAT5 cable.
4. Power the Remote Unit with its included power supply.
For more information, or if your installation includes any KVM switches, refer to
Chapter 5.
Remote keyboard
and mouse
Local CPU
Extender’s
Local Unit
CAT5
cable
Power
supply
Included
PS/2
extension
cables
Extender’s
Remote Unit

10
SERVSWITCH™ BRAND PS/2 MICRO EXTENDER
2. Specifications
Cable Required: Between Local and Remote Units: Category 5 solid
unshielded or shielded twisted pair (UTP or STP),
wired to the EIA/TIA-568A or (preferred) -568B
standard, terminated with RJ-45 male connectors; for
pinning/pairing, see the Appendix
Compliance: CE Class B; FCC Part 15 Subpart J Class A, IC Class/
classe A
Interface: IBM PS/2 compatible
Compatibility: Keyboard: IBM PC/AT or PS/2 compatible (PC/AT
types require connector adapter);
Mouse: IBM PS/2 compatible two-button, Microsoft
IntelliMouse, or Logitech PS/2 compatible 3-button
Maximum
Distance: 5 m (16 ft.) from the Local Unit to the attached CPU or
KVM switch;
5 m (16 ft.) from the Remote Unit to the attached
monitor, keyboard, and mouse or KVM switch;
300 m (1000 ft.) between Local and Remote Units
NOTE
With high-quality cables, it might be possible to run
farther than 5 m (15 ft.) from the Extender to attached
equipment.
Connectors: On Local Unit:
(2) Left-side-mounted 6-pin mini-DIN female for
output to CPU’s keyboard and mouse ports;
(1) Right-side-mounted RJ-45 female for local/remote
interconnection;
On Remote Unit:
(2) Left-side-mounted 6-pin mini-DIN female for input
from keyboard and mouse;
Right-side-mounted:
(1) RJ-45 female for local/remote interconnection;
(1) 2.5-mm center-positive barrel jack for power
Temperature
Tolerance: 32 to 104˚F (0 to 40˚C)

11
CHAPTER 2: Specifications
Humidity
Tolerance: 5 to 90% noncondensing
Enclosure: Steel
Power: Local Unit:
5 VDC at up to 120 mA from CPU’s keyboard port;
Remote Unit:
From desktop power supply (certified to meet the
relevant international safety standards):
Input: 100 to 240 VAC at 50 to 60 Hz from utility-
power (mains) outlet, through detachable power
cord and IEC 320 male inlet, to external
transformer;
Output: 5 VDC regulated, at up to 1 amp, from
transformer to Remote Unit
Size: Each Unit:
Height: 1" (2.5 cm); feet protrude an additional 0.1"
(0.2 cm) from bottom;
Width: 4.3" (10.9 cm);
Depth: 3.2" (8.1 cm); additionally, screws protrude less
than 0.1" (0.2 cm) from both the front and the back
Weight: 8.3 oz. (235 g)

12
SERVSWITCH™ BRAND PS/2 MICRO EXTENDER
3. Introduction
By using the Local and Remote Units that together make up the ServSwitch™
Brand CAT5 PS/2 Micro Extender, you can place your keyboard and mouse as far
as 300 meters (1000 ft.) from a PC’s CPU. The Local and Remote Units are
interconnected with a single industry-standard Category 5 UTP or STP 4-pair cable.
All keyboard and mouse signals are fully buffered to ensure consistent remote
operation of your PC.
The Extender operates automatically and works with all operating systems—no
software is required. Just connect the Units as described in Chapter 5 and you’re
ready to work!
Because the Extender performs complete PS/2®keyboard and mouse emulation,
you can boot the PC without having a keyboard or mouse attached to it. Your PC
will boot even if the Extender’s Remote Unit is not powered or has no keyboard or
mouse connected to it.

13
CHAPTER 3: Introduction
3.1 Compatibility
The ServSwitch Brand CAT5 PS/2 Micro Extender is designed to operate in
various environments and with a mix of hardware from different manufacturers.
During development, this product was extensively tested with a wide variety of
hardware. However, please note that it is impossible for us to guarantee that the
Extender will interoperate correctly with every keyboard, mouse, and
motherboard variant currently on the market. If you suspect that you’re having
incompatibility problems, please call Black Box Technical Support.
In general, the Extender is compatible with the following types of equipment:
•CPU: IBM®PC/AT®, PS/2, and 100% compatible clones. These should be
desktop machines; laptops and docking stations are not supported.
•Keyboard: Standard (101- or 102-key) PS/2 type or enhanced PS/2 type (104-
or 105-key, designed for use with versions of Windows®starting with
Windows 95). Although we don’t recommend this, you might also be able to
use a PC/AT type keyboard with 5-pin DIN connectors; you’ll need adapters to
attach it and its native CPU to the Extender (see the start of Section 4.2).
Some older PC/XT™ or PC/AT type autosensing keyboards might not be
compatible with the Extender. If the keyboard you want to use is some other
type or has some other type of connector, call Black Box for technical support.
For information about keyboard typematic support, see Section 6.2.
•Mouse: Standard PS/2 type, Microsoft®IntelliMouse®compatible, or
Logitech™ 3-button PS/2 compatible mouse; the CPU should have standard
PS/2 type mouse ports. If your PC doesn’t have a PS/2 style mouse port, you’ll
need a special adapter to attach the PS/2 mouse cable to one of the PC’s serial
ports (see the start of Section 4.2). The Extender is not compatible with serial
mice or bus mice. If a mouse you want to attach is some other type or has some
other type of connector, call Black Box Technical Support.

14
SERVSWITCH™ BRAND PS/2 MICRO EXTENDER
3.2 Key Features
The ServSwitch Brand CAT5 PS/2 Micro Extender has a number of useful features
which contribute to the transparent remote operation of your PC. Some of the
more important ones are:
•Distance up to 300 m (1000 ft.)
Operate your PC from the next room or all the way down the hall.
•Fully buffered signals
Remote operation of the PC is consistently smooth and transparent.
•Intelligent PS/2 keyboard and mouse emulation
With this, the PC boots and operates correctly under most circumstances, and
you can freely detach and reconnect the keyboard and mouse as necessary
(the Extender automatically initializes the keyboard and mouse as soon as it
detects that you’ve reattached them).
•Microsoft IntelliMouse compatibility
Use this and compatible “wheel mice” with confidence.
We recommend that you read the remainder of this manual before you install the
Extender in order to fully familiarize yourself with the system.

15
CHAPTER 4: Checklist of System Components
4. Checklist of System Components
4.1 The Complete Package
These items should be included with your ServSwitch™ Brand CAT5 PS/2 Micro
Extender package (please contact Black Box right away if any are missing or
damaged):
• (1) Extender Local Unit.
• (1) Extender Remote Unit.
• (1) 5-VDC 1-amp power-supply transformer and output cord.
• (1) Power-supply input cord suitable for your country or region.
• (2) 6-ft. (1.8-m) PS/2 extension cables with 6-pin mini-DIN connectors to
connect your PC CPU to the Extender.
(If your PC has 5-pin DIN keyboard
connectors, see the start of Section 4.2 for how you’ll connect it.)
• (1) Copy of this manual.
4.2 The Cables You’ll Need
If you are using the ServSwitch™ Brand CAT5 PS/2 Micro Extender to get greater
distance between a CPU and a PS/2 keyboard and mouse, your Extender package
should have included everything you’ll need except for your Unit-interconnection
cable. Read Sections 4.2.1, 4.2.3, and 4.2.5 carefully, then skip ahead to Chapter 5.
If you are using the Extender to get greater distance between a ServSwitch family
KVM switch and a CPU or a keyboard/mouse user station, you might need
additional non-included cabling. Read the
relevant sections on the next few pages,
from Section 4.2.1 through Section 4.2.5.
If you are using any equipment with PC/AT style connectors, you might also
need some combination of these adapters:
• To attach a CPU or KVM switch with a 5-pin DIN female keyboard
connector
to the Local Unit: A keyboard-port adapter such as product code FA211.
• To attach a CPU or KVM switch with an RS-232 serial DB9 male mouse connector
to the Local Unit
: A mouse-port adapter such as product code AC244A. (If the
mouse port is DB25 rather than DB9, you’ll also need an FA521A serial adapter .)
• To attach a keyboard or KVM switch with a 5-pin DIN male keyboard connector
to the Local or Remote Unit: A keyboard adapter such as product code FA212.

16
SERVSWITCH™ BRAND PS/2 MICRO EXTENDER
4.2.1 T O C ONNECT A CPU TO THE L OCAL U NIT
You’ll use the PS/2 extension cables included with the ServSwitch™ Brand CAT5
PS/2 Micro Extender to make this connection.
4.2.2 T O C ONNECT A S ERV S WITCH F AMILY KVM S WITCH TO THE L OCAL U NIT
You would do this to extend the distance you can run from the KVM switch to a
keyboard and mouse.
The Local Unit has 6-pin mini-DIN keyboard and mouse connectors mounted
on the opposite end of the Unit from the RJ-45 jack. Which cable(s) you’ll use to
attach the KVM switch to these connectors will depend on what type of user ports
the switch model has, as detailed in the following three subsections.
4.2.2.A Switches Whose User Ports Are a Set of Separate Interfaces
The user ports of some ServSwitch family KVM switches are a set of separate
interfaces: Each user port consists of separate interfaces/connectors for video,
keyboard, and mouse communication. At the time of this writing, some of the
important ServSwitch family models in this category are:
• ServSwitch™ Duo
• ServSwitch™ Wizard, Wizard LP, Wizard Pro
• ServSwitch™ Jr.
• Personal ServSwitch™
• ServSelect™
• ServSwitch™ Multi Base Unit or MX (“local console” user port only)
To attach a user port on one of these switches to the Local Unit’s CPU port, you
can use the PS/2 extension cables included with the Extender.

17
CHAPTER 4: Checklist of System Components
4.2.2.B Switches with DB25 Composite User Ports
The user ports of several ServSwitch family KVM switches are specially pinned
DB25 connectors that function as composite (all-in-one) interfaces. At the time of
this writing, some of the important ServSwitch family models in this category are:
• ServSwitch™
• ServSwitch™ Ultra
• Matrix ServSwitch™
• ServSwitch™ Affinity
• ServShare™
To attach a user port on one of these switches to the Local Unit’s keyboard and
mouse connectors, you’ll need a three-to-one ServSwitch User Cable (product code
EHN054B for standard or EHN283 for coaxial), plus the PS/2 extension cables
included with the Extender. Refer to Section 5.2.2.B for a description of how this
cabling fits together.
4.2.2.C ServSwitch Multi (HD62 Composite User Ports)
The user ports on User Cards installed in the ServSwitch Multi are HD62 female
connectors that function as composite (all-in-one) interfaces. To attach one of
these ports to the Local Unit’s CPU port, you’ll need a many-to-one ServSwitch
Multi User Cable such as product code KV2505, plus the PS/2 extension cables
included with the Extender. Refer to Section 5.2.2.B for a description of how this
cabling fits together.

18
SERVSWITCH™ BRAND PS/2 MICRO EXTENDER
4.2.3 T O C ONNECT A K EYBOARD AND M OUSE TO THE R EMOTE U NIT
You’ll be plugging the keyboard and mouse directly into the corresponding
connectors on the Remote Unit.
4.2.4 T O C ONNECT A S ERV S WITCH F AMILY KVM S WITCH TO THE R EMOTE U NIT
You would do this to extend the distance you can run from the KVM switch to a
CPU.
On the Remote Unit and the Dual-Access Local Unit, the user ports are the
HD15 and 6-pin mini-DIN connectors on the opposite end of the Unit from the
RJ-45 jack. Which cable(s) you’ll use to connect the switch to it will depend on
what type of CPU ports the switch model has, as detailed in the following three
subsections.
4.2.4.A Switches Whose CPU Ports Are a Set of Separate Interfaces
The CPU ports of some ServSwitch family KVM switches are a set of separate
interfaces: Each CPU port consists of separate interfaces/connectors for video,
keyboard, and mouse communication. At the time of this writing, some of the
important ServSwitch family models in this category are:
• ServSwitch™ Duo
• ServSwitch™ Wizard, Wizard LP, Wizard Pro
• Personal ServSwitch™
You can use the PS/2 extension cables included with the Extender to attach a CPU
port on one of these switches to the keyboard and mouse connectors on the
Remote Unit. If you’ll need those cables to attach a CPU or KVM switch to the
Local Unit, buy two more separately (product code EVMPS03-MM).

19
CHAPTER 4: Checklist of System Components
4.2.4.B Switches with Regular ServSwitch Style DB25 Composite CPU Ports
The CPU ports of the regular ServSwitch and several other ServSwitch family KVM
switches are specially pinned DB25 connectors that function as composite (all-in-
one) interfaces. At the time of this writing, some of the other important ServSwitch
family models in this category are:
• ServSwitch Ultra
• Matrix ServSwitch
• ServSwitch Affinity
• ServSwitch Jr.
• ServShare
(Note: The ServSelect also has DB25 composite CPU ports, but they are pinned
differently. See Section 4.2.4.C.)
To attach a CPU port on one of these switches to the keyboard and mouse
connectors on a Remote Unit, you’ll need a ServSwitch CPU Cable (product code
EHN051B for standard or EHN282 for coaxial).
4.2.4.C Switches with Other Types of Composite CPU Ports
The CPU ports of some ServSwitch family KVM switches are composite (all-in-one)
interfaces that are not the same as those on the regular ServSwitch, but the
principle for connecting them is the same:
• The CPU ports on CPU Cards installed in the ServSwitch Multi are HD44
female connectors. To attach one of these CPU ports to the keyboard and
mouse connectors on a Remote Unit, you’ll need a ServSwitch Multi CPU
Cable such as product code KV2020-R2.
• The CPU ports on the ServSelect are DB25 connectors pinned differently from
the DB25 connectors on the regular ServSwitch. To attach one of these CPU
ports to the keyboard and mouse connectors on a Remote Unit, you’ll need a
ServSelect Cable (product code EHN056).