Kramer RTBUS-28XL User manual

P/N: 2900-301535 Rev 1 www.kramerAV.com
USER MANUAL
MODEL:
RTBUS-28XL
Round Table Connection Bus

Kramer Electronics Ltd.
RTBUS-28XL –Contents
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Contents
Introduction 1
Getting Started 1
Overview 2
Defining RTBUS-28XL Round Table Connection Bus 3
The RTBUS-28XL Connecting Surface 4
Universal Power Socket 4
Installing the RTBUS-28XL 5
Drilling a Hole in the Table 5
Connecting the Cables 5
Mounting the RTBUS-28XL in the Table 7
Using the RTBUS-28XL 8
Technical Specifications 9

Kramer Electronics Ltd.
RTBUS-28XL –Introduction
1
Introduction
Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been providing a world
of unique, creative, and affordable solutions to the vast range of problems that confront the
video, audio, presentation, and broadcasting professional on a daily basis. In recent years, we
have redesigned and upgraded most of our line, making the best even better!
Getting Started
We recommend that you:
•Unpack the equipment carefully and save the original box and packaging materials for
possible future shipment.
•Review the contents of this user manual.
Go to www.kramerav.com/downloads/RTBUS-28xl to check for up-to-date user manuals,
application programs, and to check if firmware upgrades are available (where appropriate).
Achieving Best Performance
•Use only good quality connection cables (we recommend Kramer high-performance,
high-resolution cables) to avoid interference, deterioration in signal quality due to poor
matching, and elevated noise levels (often associated with low quality cables).
•Do not secure the cables in tight bundles or roll the slack into tight coils.
•Avoid interference from neighboring electrical appliances that may adversely influence
signal quality.
•Position your Kramer RTBUS-28XL away from moisture, excessive sunlight and dust.
Safety Instructions
Caution:
•This equipment is to be used only inside a building. It may only be connected to other
equipment that is installed inside a building.
•There are no operator serviceable parts inside the unit.

Kramer Electronics Ltd.
RTBUS-28XL –Introduction
2
Recycling Kramer Products
The Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC aims to reduce
the amount of WEEE sent for disposal to landfill or incineration by requiring it to be collected
and recycled. To comply with the WEEE Directive, Kramer Electronics has made
arrangements with the European Advanced Recycling Network (EARN) and will cover any
costs of treatment, recycling and recovery of waste Kramer Electronics branded equipment on
arrival at the EARN facility. For details of Kramer’s recycling arrangements in your particular
country go to our recycling pages at www.kramerav.com/support/recycling.
Overview
Congratulations on purchasing your Kramer RTBUS-28XL Round Table Connection Bus.
The RTBUS-28XL is an elegant furniture-mounted, round connection bus. The RTBUS-28XL
features a mechanism for pneumatic lifting and smooth closing of its lid. It is easily installed
into a table or podium top, and its interface enables you to connect any equipment to systems
installed in a room:
•Four pass-through openings for cables, located on the lower surface, enabling closing of
the lid while keeping the cables hidden and protected under the surface.
•USB type A and USB type B ports for charging.
•A Universal power socket.

Kramer Electronics Ltd.
RTBUS-28XL –Defining RTBUS-28XL Round Table Connection Bus
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Defining RTBUS-28XL Round
Table Connection Bus
This section defines RTBUS-28XL.
Figure 1: RTBUS-28XL Round Table Connection Bus Front Panel
#
Feature
Function
Pneumatic Mechanism
Enables automatic lifting and smooth closing of the lid.
Outer Rim
Fits over the table surface.
Mounting Screws (x2)
For securing RTBUS-28XL to the table.
Locking Butterfly Nuts (x2)
Tighten to lock the mounting butterfly screw.
Mounting Butterfly Nuts (x2)
Tighten to secure the unit to the table surface.
Mounting Brackets (x2)
For securing the unit to the table surface.
Black Anodized or Brushed
Aluminum Semi-Automatic Lid
(with Opening for Cable Pass-
Through)
Covers the connecting surface, leaving the table surface neat and tidy.
Lid Latch (x2)
For safely closing the lid.
Inner Pass-Through Opening
and Bushing (x1)
Insert a cable through the opening and the bushing –for larger or
multiple cables (inner diameter approx. 12.5mm Ø).
Pass-Through Opening and
Bushing (x3)
Insert a cable through the opening and the bushing (inner diameter
approx. 10 mm Ø).
1
2
3
4
5
6
7
8
9
10

Kramer Electronics Ltd.
RTBUS-28XL –Defining RTBUS-28XL Round Table Connection Bus
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The RTBUS-28XL Connecting Surface
Figure 2 defines the connecting surface.
Figure 2: RTBUS-28XL Connecting Surface
#
Feature
Function
USB-C Charging Port
Use to charge a device.
5V-2.4A/1A USB Charging Port
Use to charge a device.
5A MAX. Universal Power Socket
Connect to a 90-240V AC power consuming device.
Universal Power Socket
A Universal Power Socket is available for general use and is fully compatible with power plugs in
the UK, India, Italy and Denmark, as well as with the 2-prong Europlug. The Universal Power
Socket is partially compatible (if the polarity is reversed) with plugs in China, Switzerland, Israel
and the USA but does not supply grounding to plugs in Central Europe and France and is not
compatible with South African plugs.
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12
11

Kramer Electronics Ltd.
RTBUS-28XL –Installing the RTBUS-28XL
5
Installing the RTBUS-28XL
To install the RTBUS-28XL perform the following steps:
1. Drill a hole in the table (see Drilling a Hole in the Table on page 5).
2. Connect the cables (see Connecting the Cables on page 5).
3. Secure the unit to the table (see Mounting the RTBUS-28XL in the Table on page 7).
Drilling a Hole in the Table
To drill an opening in the table:
1. Using any standard cup bit drill with a diameter ranging from 138mm to 140mm (5.4” to
5.5”), drill a hole in the table in the desired location.
The thickness of the table should be 3”w (76mm) or less.
2. Clean the table surface.
Take care not to damage the table. Kramer AV is not responsible for any damage caused to
the table.
Connecting the Cables
You can install the cables either before mounting the RTBUS-28XL on a table, or after it is
mounted (usually if the RTBUS-28XL is mounted and you need to replace the cables).
To connect the cables:
1. Insert the cables through the
pass-through openings.

Kramer Electronics Ltd.
RTBUS-28XL –Installing the RTBUS-28XL
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2. Insert a cable into an opening
and place the bushing around
the cable.
3. Push the bushing into the pass-
through opening to secure.
We recommend that you use the Kramer C-AC AC Power Cord series to power the unit.

Kramer Electronics Ltd.
RTBUS-28XL –Installing the RTBUS-28XL
7
Mounting the RTBUS-28XL in the Table
To mount the unit:
1. Insert the RTBUS-28XL into the hole
cut into the table making sure the
outer rim is firm against the surface of
the table.
2. From underneath the table, slide the
mounting brackets into the
appropriate slots.
3. Step 3: Tighten the butterfly mounting
screws securely upward against the
table.
4. Lock the mounting screws into
position with the locking butterfly
screws.

Kramer Electronics Ltd.
RTBUS-28XL –Using the RTBUS-28XL
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Using the RTBUS-28XL
Once the RTBUS-28XL is installed, you can easily customize it to your own needs by directly
plugging in the required AV equipment, as illustrated in the example in Figure 3.
Figure 3: RTBUS-28XL Boardroom Installation