AVAB Digital Dimmer II Installation And Operation Manual

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DIGITAL DIMMER II 
INSTALLATION AND OPERATION MANUAL
Version 1.6
Revised 20021011

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Summary of Contents for AVAB Digital Dimmer II

  • Page 1 DIGITAL DIMMER II  INSTALLATION AND OPERATION MANUAL Version 1.6 Revised 20021011...
  • Page 2  Digital Dimmer II Installation and Operations Manual v1.6 CONTENTS Preface Specifications General Description Description of Controls Description of Indicators Description of Connectors Figure 1 Installation Location Line Terminations Load Terminations Output Phasing Diagram Trouble Shooting Maintenance Replacement of SCR modules...
  • Page 3 Installation and Operations Manual v1.6 PREFACE This users' manual applies to all AVAB Digital Dimmer II  dimmer packs. The Digital Dimmer II  is also referred to as the DDII  , pronounced "dee-dee-too". The AVAB DDII is a system based on a microcomputer; as such, it may be programmed to do many different things.
  • Page 4: Specifications

     Digital Dimmer II Installation and Operations Manual v1.6 SPECIFICATIONS GENERAL: The DDII is available in 6, 12 or 24 channel units, with power ratings of 1200, 1800, 2400, 4200, or 6000 watts per channel. Dimming is via phase control using an entirely digital triggering system.
  • Page 5  Digital Dimmer II Installation and Operations Manual v1.6 LOAD: 10 watt to 1200, 1800, 2400, 4000 or 6000 watts, incandescent, inductive, or fluorescent with dimming type ballast. DIMMING CURVE: Software dependent, user selectable. FILTERING: Powdered iron core torodial chokes. 500 µ sec. rise time is standard. 800 µ sec.
  • Page 6: General Description

    422/RS-232 compatible, and offer twisted-pair transmission over distances up to 3000 feet. The main serial link receives data in either AVAB's AVAB-240 protocol or USITT's DMX- 512 protocol. Selection of protocol is currently set at the factory and is not user selectable.
  • Page 7: Description Of Controls

    System Configuration Switches- Located on the dimmer PC card, these "DIP" switches are used in initial system setup. The user should have few occasions to change them. Refer to the appropriate AVAB Software documentation for details. Pack Switch- These two rotary switches select the "pack number" in a digital multiplex system.
  • Page 8: Description Of Connectors

     Digital Dimmer II Installation and Operations Manual v1.6 power wiring entry, should ALWAYS REMAIN OFF. If is on, it indicates that there is voltage between ground and neutral - a condition that must NEVER exist. This could be the result of reversing a hot leg and neutral, or a hot leg and ground.
  • Page 10: Installation

    To facilitate rack or road case mounting, a set of rack "ears" is available from AVAB. The holes in the ears match the standard hole centers in a 19" EIA equipment rack or case. It should be noted that the rack ears alone are not sufficient to support the weight of the dimmer.
  • Page 11  Digital Dimmer II Installation and Operations Manual v1.6 LINE TERMINATIONS The DDII may be operated on the following types of services: 1-phase, 120 volt 2 wire + ground. 1-phase, 120/240 volt 3 wire + ground. 3-phase, 120/208 volt "Y" 4 wire + ground.
  • Page 12  Digital Dimmer II Installation and Operations Manual v1.6 Load circuit conductors shall be sized in accordance with applicable codes for the above current ratings, as required. Note that stage lighting loads are by nature unbalanced. Therefore, neutral conductors must not be shared.
  • Page 14: Troubleshooting The System

    To those users who have the knowledge and equipment to troubleshoot and repair digital electronics equipment may purchase the Digital Dimmer II service manual, which provides the information necessary for successful troubleshooting at the component level.
  • Page 15 "hot" on a digital voltmeter. Because of this, verify dimmer output with a known good test fixture. Refer to the appropriate AVAB Software documentation for information on Italic keywords. In order to facilitate the troubleshooting process, symptoms have been divided into three categories: 1) problems that affect all channels, 2) problems that effect groups of channels, and 3) problems that affect individual channels.
  • Page 16 All channels may have been programmed via the CommandLink to the no effect. "Constant-On" curve. Refer also to the "AVAB Term-600 programming terminal manual". No lights at all and Check φ LEDs and +5V LED. If off, check main power and 4 fuses on channel LEDs are front panel.
  • Page 17 Configuration. more dimmer A channel or group of channels may have been programmed via the packs; controllers CommandLink to the "Constant-On" curve. Refer also to the "AVAB Term- have no effect. 600 programming terminal manual". A "phase group" Check φ LEDs; If one or more are off, check fuses.
  • Page 18 Channel output The channel may have been programmed via the CommandLink to the stays on at full "Constant-On" curve. Refer also to the "AVAB Term-600 programming and channel LED terminal". is on. The channels' "Instant-On" switch may be on.
  • Page 19: Maintenance

    Installation and Operations Manual v1.6 MAINTENANCE REPLACEMENT OF SCR MODULES Replacement SCR modules are available through AVAB for field replacement either by the dealer or directly by the end user. Replacement of a module requires the following tools: #2 Philips screwdriver...
  • Page 20: Replacement Of Fuses

    REPLACEMENT OF CIRCUIT BREAKERS With heavy use, circuit breakers may fail in time. Replacement circuit breakers are available through AVAB for field replacement either by the dealer or directly by the end user. Replacement of a circuit breaker requires the following tools: #2 Philips screwdriver 1/4"...
  • Page 21  Digital Dimmer II Installation and Operations Manual v1.6 FAILURE TO INSTALL THE CORRECT BREAKER MAY CAUSE SEVERE DAMAGE TO THE DIMMER AND EXTERNAL WIRING, POSSIBLY CAUSING FIRE. 6. Close the breaker holder and re-insert the screws. Attach the nuts. Verify that all breakers are seated properly against the front panel before tightening the nuts.
  • Page 22: Control Connector Pinouts

    Installation and Operations Manual v1.6 APPENDIX A: CONTROL CONNECTOR PINOUTS The following connector pinouts apply only to AVAB DD-II series Digital Dimmers equipped with Distribution Card DD-IIB, Rev 1.1, Rev 1.2, or Rev C. FRONT PANEL (Trigger Card) External Connector "A": External Connector "B":...
  • Page 23 Analog Input Analog Input Note Standard on all DD-IIB dimmers. May be disabled at distribution card. Contact AVAB for details. Note Function of Analog Input varies; refer to appropriate AVAB Software documentation for details. ©1999 AVAB America Inc. Page 23...
  • Page 24 Ø3. AVAB DDII dimmers are factory configured for a 120/208 3 Phase 4 Wire feed. The table below shows the correlation between input terminal, internal wiring, and individual circuits. The configuration can be changed to suit your power feed according to the table below.
  • Page 25: Wall Mount Installation

     Digital Dimmer II Installation and Operations Manual v1.6 APPENDIX B: WALL MOUNT INSTALLATION Refer to the following drawings for dimensions and termination location. ©1999 AVAB America Inc. Page 24...

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