Kramer VS-4228 Manuale utente

KRAMER ELECTRONICS LTD.

USER MANUAL

MODEL:

VS-4228

8-Port RS-422 Matrix Switcher

P/N: 2900-002033 Rev 5

VS-4228 – Contents

Contents

1Introduction 1

2Getting Started 2

2.1 Achieving the Best Performance 2

2.2 Safety Instructions 2

2.3 Recycling Kramer Products 3

3Overview 4

3.1 Defining the VS-4228 8-Port RS-422 Matrix Switcher 4

3.2 About RS-422 7

4Connecting the VS-4228 10

4.1 Connecting a PC or Controller to the RS-232 Port 11

4.2 Connecting a PC or Controller to the RS-485 Port 12

4.3 Cascading Multiple Units 12

5Operating the VS-4228 15

6Technical Specifications 17

7Default Communication Parameters 18

8Hex Codes 19

Figures

Figure 1: VS-4228 8-Port RS-422 Matrix Switcher Front Panel 5

Figure 2: VS-4228 8-Port RS-422 Matrix Switcher Rear Panel 6

Figure 3: Bi-directional Signals I 7

Figure 4: Bi-directional Signals II 7

Figure 5: Connecting the VS-4228 8-Port RS-422 Matrix Switcher 10

Figure 6: Crossed Cable RS-232 Connection 11

Figure 7: Straight Cable RS-232 Connection with a Null Modem Adapter 11

Figure 8: Cascading Units via the RS-232 Control Interface 13

Figure 9: Cascading Units via the RS-485 Control Interface 14

VS-4228 - 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!

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 - Getting Started

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

Go to http://www.kramerelectronics.com/support/product_downloads.asp

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 (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 VS-4228 away from moisture, excessive sunlight and

dust

This equipment is to be used only inside a building. It may only be

connected to other equipment that is installed inside a building.

2.2 Safety Instructions

Caution:

There are no operator serviceable parts inside the unit

Warning:

Use only the power cord that is supplied with the unit

Warning:

Do not open the unit. High voltages can cause

electrical shock! Servicing by qualified personnel only

Warning:

Disconnect the power and unplug the unit from the wall

before installing

VS-4228 - Getting Started

2.3 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 http://www.kramerelectronics.com/support/recycling/.

VS-4228 - Overview

3 Overview

The VS-4228 is a high-performance bidirectional matrix switcher for RS-422

control signals. It can connect multiple ports to create from one to four bidirectional

communication groups.

In particular, the VS-4228 features:

Simple-to-connect automatic master/slave configuration

A bright LED display showing the status of the matrix switcher

Recall of up to 8 configuration setups via the non-volatile memory

Control via the front panel buttons, or remotely by RS-485 or RS-232 serial

commands transmitted by a touch screen system, PC, or other serial

controller

3.1 Defining the VS-4228 8-Port RS-422 Matrix Switcher

This section defines the VS-4228.

VS-4228 - Overview

VS-4228 –Overview

Figure 1: VS-4228 8-Port RS-422 Matrix Switcher Front Panel

Feature

Function

Power Switch

Illuminated switch that turns power ON and OFF

MASTER Buttons

Select the MASTER to switch to the SLAVE

SLAVE Buttons

Select the SLAVE to which the MASTER is switched

ALL Button

Pressing ALL before pressing a MASTER button, connects all SLAVE devices to that MASTER

OFF Button

Pressing OFF after pressing a SLAVE button disconnects the MASTER. To disconnect all the SLAVE devices,

press the ALL button and then the OFF button

STO Button

Pressing STO (STORE) followed by an SLAVE button stores the current setting

RCL Button

Pressing the RCL (RECALL) button and the corresponding SLAVE key recalls a setup. The stored status

flashes. Pressing a different SLAVE button lets you view another setup. After making your choice, pressing the

RCL button again implements the new status

SLAVE STATUS

Labels identify a cross point between each SLAVE to which the MASTER displayed below is connected

MASTER STATUS

The number shows the selected MASTER switched to the SLAVE (below the corresponding SLAVE label)

VS-4228 - Overview

Figure 2: VS-4228 8-Port RS-422 Matrix Switcher Rear Panel

Feature

Function

RS-422 9-pin D-sub Connectors

RS-422 bi-directional ports (1-8)

CONTROL RS-485 Terminal Block Connector

Connector for external RS-485 control (PINOUT: G, -, +)

CONTROL RS-232 IN 9-pin D-sub Connector

Connect to the PC serial port

CONTROL RS-232 OUT 9-pin D-sub Connector

Connect to the RS-232 IN port of the next unit

Power Connector with Fuse

AC connector enabling power supply to the unit

VS-4228 –Overview

VS-4228 - Overview

3.2 About RS-422

RS-422 control switchers differ substantially from video and audio switchers in

both design and in operation, as Sections 3.2.1 to 3.2.6 describe.

3.2.1 Signal Terminology

Connections are between master and slave or controller and controlled devices,

rather than the regular In and Out or source and destination devices. The

difference is not merely one of semantics but a vital distinction when trying to

understand the concept of RS-422 technology.

A regular In and Out switcher has separate input and output buttons on the front

panel and separate ports for input and output connectors on the rear panel.

A master and slave control switcher, has separate master and slave buttons on

the front panel but shared master/slave connectors on the rear panel.

3.2.2 Bi-directional Signals

By using a pair of conductors, each signal travels in both directions over a

balanced line between master/slave devices, as Figure 3 illustrates:

Figure 3: Bi-directional Signals I

When a master device changes position with a slave device, the pins automatically

change, as Section 3.2.4 describes and as Figure 4 illustrates:

Figure 4: Bi-directional Signals II

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