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Leader LT 4441 Instruction Manual

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LT 4441 / LT 4442
CHANGEOVER
INSTRUCTION MANUAL

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Summary of Contents for Leader LT 4441

  • Page 1 LT 4441 / LT 4442 CHANGEOVER INSTRUCTION MANUAL...

  • Page 2: Table Of Contents

    4.3.4 Error Detection Level Settings (User setting)..............17 4.3.5 Signal Switch Time Settings ..................18 4.3.6 Operation Mode and Standby Time Settings ..............19 Signal I/O ..........................20 Configuring the LT 4441/4442....................21 4.5.1 Enabling the Key Lock ....................21...
  • Page 3 4.5.2 Switching the Output Signal................... 21 4.5.3 Setting Automatic Signal Switching................22 4.5.4 Error Display and Resetting ................... 23 EXTERNAL INTERFACE..................24 Remote-control Connector....................24 CALIBRATION AND REPAIRS ................. 26...
  • Page 4 ■ Note about Reading This Manual The contents of this manual contain specialized terminology and may be difficult to understand. If you have any questions about the contents of this manual, please contact your local LEADER agent. ■ Symbols and Terms The following symbols and terms are used in this instruction manual and on the instrument to indicate important warnings and notes.
  • Page 5 Only use a power source whose frequency is 50/60 Hz. Only use the supplied power cord. Using any other power cord with this instrument could lead to fire. If the supplied power cord is damaged, stop using it, and contact your local LEADER agent.
  • Page 6 GENERAL SAFETY SUMMARY Read the warnings and information below thoroughly to avoid death, personal injury, and damage and deterioration of the instrument. • Operating Humidity Range Use this instrument in an environment whose relative humidity is 85 % or less where there is no threat of condensation forming.
  • Page 7 Precautions are also contained in various other sections of this instruction manual. To use the instrument correctly, be sure to follow those precautions as well. If you have any questions or comments about this instruction manual, please contact your local LEADER agent.

  • Page 8: Introduction

    1. INTRODUCTION INTRODUCTION Thank you for purchasing this LEADER instrument. To use this instrument safely, read this instruction manual thoroughly, and make sure that you know how to use the instrument properly. If some point about the operation of this instrument is still unclear after you have read this instruction manual, refer to the contact information on the back cover of the manual to contact LEADER, or contact your local LEADER agent.

  • Page 9: Shorting And Applying External Input To The Output Connectors

    1. INTRODUCTION 1.2.3 Shorting and Applying External Input to the Output Connectors Do not short the output connectors. Doing so may damage the instrument. Do not apply an external signal to the output connectors. Doing so may damage the instrument and devices that are connected to it. 1.2.4 Mechanical Shock This instrument contains sensitive components, so it may be damaged if it is dropped or...

  • Page 10: Specifications

    LED. The LT 4442 is a short version of the LT 4441 changeover unit. The depth of the LT 4442 is 400 mm. You can combine the LT 4441/4442 with multi-format video generator LT 443D or LT 4400 to configure a system.

  • Page 11: Specifications

    Combining with an LT 443D or LT 4400 The depth of the LT 4441 matches the LT 443D and the depth of the LT 4442 matches the LT 4400. This makes it easy to wire and operate the devices when you combine them.

  • Page 12: Types Of Input Signals

    Channels 1 to 3 10 ms or less Channels 4 to 11 100 ns or less Automatic Switching Time until the LT 4441/4442 switches to a backup signal after the primary signal is interrupted Channels 1 to 3 70 ms or less Channels 4 to 8 90 μs or less (FAST)

  • Page 13: Error Detection

    2. SPECIFICATIONS 2.3.5 Error Detection Time from When the LT 4441/4442 Turns On to When Error Detection Starts FAST 1 minute or more (60 to 80 seconds) SLOW 4 minutes or more (240 to 320 seconds) Error Display Total Error Display The corresponding front-panel FAULT INDICATOR LED blinks.

  • Page 14: Key Lock

    Frequency 50/60 Hz Power Consumption 25 W max. Dimensions 426 (W) × 44 (H) × 560 (D) mm (LT 4441) 426 (W) × 44 (H) × 400 (D) mm (LT 4442) (both excluding protrusions) Weight 4.0 kg (LT 4441) 3.5 kg (LT 4442) Accessories Power Cord ........

  • Page 15: Names And Functions Of Parts

    The LEDs show the key-lock state. Also, you can press the key to turn the key lock ON or OFF. The LT 4441/4442 locks its keys after 1 minute of inactivity (no key operations). When the key lock is ON, front-panel key operations are ignored.

  • Page 16: Rear Panel

    See section 4.4, “Signal I/O.” REMOTE This is the remote control connector. You can use this connector to perform functions such as configuring the LT 4441/4442 and generating error information. See section 5.1, “Remote-control Connector.” 10 AC inlet Attach the included cover inlet stopper to the AC inlet before using it.

  • Page 17: Top Panel

    12 DIP switch cover When you remove the four screws and the cover, the DIP switches appear. DIP switches are used to configure the LT 4441/4442. An explanation of the settings is printed on the back side of the cover.

  • Page 18: How To Use

    The LT 4441/4442 uses a relay. A clicking noise can be heard when you turn the power ON or OFF, but this is not a sign that the instrument is malfunctioning.

  • Page 19: Attaching The Cover Inlet Stopper

    4. HOW TO USE Attaching the Cover Inlet Stopper A cover/inlet stopper is included with the LT 4441/4442. Use this device to prevent the power cord from being pulled free of the AC inlet. To attach the cover/inlet stopper, follow the procedure below.

  • Page 20: Dip Switch Settings

    4. HOW TO USE DIP Switch Settings Use the DIP switches on the top panel to configure the LT 4441/4442. To access the DIP switches, first remove the DIP switch cover by unscrewing its four screws. The following figure shows the DIP switches. This figure shows the factory default settings.

  • Page 21: Setting Method

    4. HOW TO USE The settings are listed below. For details on each item, see the following sections in chapter 4. A simple explanation of the settings is also printed on the back side of the DIP switch cover. Table 4-1 List of settings Setting Name Remark...

  • Page 22: Input Signal Settings

    4.3.2 Input Signal Settings The types of signals that you can apply to the LT 4441/4442 differ depending on the channel as shown below. Decide the type of signal that you will assign to each channel. To avoid errors, do not connect the signals until you have completed making all the settings.

  • Page 23: Error Detection Reference Settings

    4. HOW TO USE 4.3.3 Error Detection Reference Settings You can select the reference level that is used to detect errors in the input signals. You can select LOW or HIGH. Set VREF LOW or VREF HIGH to ON for each signal type. Normally, VREF LOW is set to ON.

  • Page 24: Error Detection Level Settings (User Setting)

    4. HOW TO USE 4.3.4 Error Detection Level Settings (User setting) You normally select the level that is used to detect errors in an input signal from VREF LOW and VREF HIGH, but you can also set this level. Set SW6 or SW7 to ON as shown in section 4.3.2, “Input Signal Settings,”...

  • Page 25: Signal Switch Time Settings

    4.3.5 Signal Switch Time Settings If an error is detected in the primary signal, the LT 4441/4442 switches to the backup signal automatically. You can select the time that the LT 4441/4442 takes to switch signals. You can select the switch times for channels 4 to 11. The switch times for channels 1 to 3 are fixed.

  • Page 26: Operation Mode And Standby Time Settings

    • Setting the Standby Time You can select the length of time that the LT 4441/4442 waits from the time that it turns ON to the time that it begins operating. Select a setting that is appropriate for the rise time of the system signal source that you are connected to.

  • Page 27: Signal I/O

    Connect the output connector to the system's signal input connector. The types of signals that you can apply to the LT 4441/4442 differ depending on the channel. For details, see Table 4-2, “Types of input signals.”...

  • Page 28: Configuring The Lt 4441/4442

    1 to 11. Also, you can press the key to manually switch the output signal. However, you may not be able to switch the signal depending on the state of the LT 4441/4442. For details, see Table 4-8, “LT 4441/4442 operations.”...

  • Page 29: Setting Automatic Signal Switching

    This setting is the same for channels 1 to If you select SWITCH FAULT, the LT 4441/4442 will automatically switch to the other signal (primary or backup signal) when an error occurs in the output signal. Normally use this setting.

  • Page 30: Error Display And Resetting

    4. HOW TO USE 4.5.4 Error Display and Resetting • Error Display When an error occurs, the LED under FAULT CHANNEL that corresponds to the channel in which the error has occurred lights, and the LED under FAULT INDICATOR that corresponds to the signal in which the error has occurred blinks.

  • Page 31: External Interface

    Use these pair of pins when you want to electrically isolate the FAULT INDICATOR- connected device from the LT 4441/4442. (There is a photocoupler inside the LT 4441/4442 that is used for isolation.) Ground...
  • Page 32 5. EXTERNAL INTERFACE Table 5-2 Remote connector I/O specifications I/O Specifications Connection example Connect a switch to apply a low signal. Connect one side of the switch to the remote connector and the other side to ground. Connect an LED so that it will light when a high signal is transmitted.

  • Page 33: Calibration And Repairs

    However, because of factors such as parts wearing out over time, the performance of the instrument may degrade. To ensure stable performance, we recommend that you have the instrument calibrated regularly. Also, if the instrument malfunctions, repairs are necessary. For repairs and calibration, contact your local LEADER agent.
  • Page 34 Following information is for Chinese RoHS only 所含有毒有害物质信息 LT 4441/4442 部件号码: 此标志适用于在中国销售的电子信息产品,依据2006年2月28日公布的 《电子信息产品污染控制管理办法》以及SJ/T11364-2006《电子信息产品污染 控制标识要求》，表示该产品在使用完结后可再利用。数字表示的是环境保护使 用期限，只要遵守与本产品有关的安全和使用上的注意事项，从制造日算起在数 字所表示的年限内，产品不会产生环境污染和对人体、财产的影响。 产品适当使用后报废的方法请遵从电子信息产品的回收、再利用相关法令。 详细请咨询各级政府主管部门。 产品中有毒有害物质或元素的名称及含量 部件名称 有毒有害物质或元素 Hazardous Substances in each Part Parts 铅 汞 镉 六价铬 多溴联苯 多溴二苯醚 (Pb) (Hg) (Cd) (Cr(Ⅵ)) (PBB) (PBDE) 实装基板...
  • Page 35 LEADER ELECTRONICS CORP. 2-6-33 Tsunashima-Higashi, Kohoku-ku, Yokohama 223-8505, Japan PHONE:81-45-541-2123 FAX:81-45-541-2823 http://www.leader.co.jp July 17, 2012 Ver.4...

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Lt 4442

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