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KRAMER ELECTRONICS LTD.
USER MANUAL
MODEL:
VS-4228
8-Port
P/N: 2900-002033 Rev 4
RS-422 Matrix Switcher
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Contents
1 Introduction 1
2 Getting Started 2
2.1 Achieving the Best Performance 2
3 Overview 3
3.1 Defining the VS-4228 8-Port RS-422 Matrix Switcher 3
3.2 About RS-422 6
4 Connecting the VS-4228 9
4.1 Connecting a PC or Controller to the RS-232 Port 10
4.2 Connecting a PC or Controller to the RS-485 Port 11
4.3 Cascading Multiple Units 11
5 Operating the VS-4228 14
6 Technical Specifications 16
7 Default Communication Parameters 17
8 Hex Codes 18
Figures
UFigure 1: VS-4228 8-Por t RS-422 Matrix Switcher Front PanelU 4
UFigure 2: VS-4228 8-Por t RS-422 Matrix Switcher Rear PanelU 5
UFigure 3: Bi-directional Signals IU 6
UFigure 4: Bi-directional Signals IIU 6
UFigure 5: Connecting the VS-4228 8-Port RS-422 Matrix SwitcherU 9
UFigure 6: Crossed Cable RS-232 ConnectionU 10
UFigure 7: Straight Cable RS-232 Connection with a Null Modem AdapterU 10
UFigure 8: Cascading Units via the RS-232 Control InterfaceU 12
UFigure 9: Cascading Units via the RS-485 Control InterfaceU 13
VS-4228 – Contents i
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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!
Our 1,000-plus different models now appear in 11 groups that are clearly defined
by function: GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Matrix
Switchers; GROUP 3: Control Systems; GROUP 4: Format/Standards Converters;
GROUP 5: Range Extenders and Repeaters; GROUP 6: Specialty AV Products;
GROUP 7: Scan Converters and Scalers; GROUP 8: Cables and Connectors;
GROUP 9: Room Connectivity; GROUP 10: Accessories and Rack Adapters and
GROUP 11: Sierra Products.
Congratulations on purchasing your Kramer VS-4228 8-Port RS-422 Matrix
Switcher, which is ideal for the following typical applications:
• Remote control of video and audio production studios
• Live broadcast remote control
• CCTV and other remote control applications
VS-4228 - Introduction 1
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i
2 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
Use Kramer high performance high resolution cables
Use only the power cord that is supplied with this machine
Go to http://www.kramerelectronics.com to check for up-to-date
user manuals, application programs, and to check if firmware
upgrades are available (where appropriate).
2.1 Achieving the Best Performance
To achieve the best performance:
• Use only good quality connection 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 VS-4228 away from moisture, excessive sunlight and
dust
2 VS-4228 - Getting Started
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