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ECM
(Eight Channel Monitor)
Description
An integral part of the IKON AVS fault monitoring network, the ECM, is designed
to monitor up to eight separate loudspeaker lines using a combination of
methods to cater for virtually all possible contingencies.
The ECM is inserted between the amplifier and loudspeaker circuit. Using a
combination of voltage comparison and current monitoring techniques the system
can be configured for use with low impedance and 100V line systems.
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Table of Contents
Summary of Contents for iKonavs ECM
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Page 1: Description
(Eight Channel Monitor) Description An integral part of the IKON AVS fault monitoring network, the ECM, is designed to monitor up to eight separate loudspeaker lines using a combination of methods to cater for virtually all possible contingencies. The ECM is inserted between the amplifier and loudspeaker circuit. Using a combination of voltage comparison and current monitoring techniques the system can be configured for use with low impedance and 100V line systems. -
Page 2: Table Of Contents
Contents DESCRIPTION CONTENTS ECM INTRODUCTION ONITORING GUIDE FUNCTIONALITY RONT ANEL ONTROLS PPENDIX RS232 S PPENDIX ANEL ONNECTIONS Amplifier and Speaker connections See Appendix C Event input See Appendix D Common Fault See Appendix E Power Supply See Appendix E Fibre Connectors See Appendix F... -
Page 3: Ecm Introduction
ECM Introduction Monitoring guide The ECM is suitable for use on 100V line systems from 30w to 1Kw ( or from 5w if using an EOL terminator ) as well as low impedance systems ranging in power from 60w to1Kw into 4 or 8 Ohms. Calibration is simple with the unit auto ranging to select the correct settings. -
Page 4: Functionality
Functionality Front Panel Controls See Appendix A Front panel controls allow calibration of the unit and LED’s display the current status of each individual circuit. ♦ Each channel when calibrated will show its current status by the illuminated LED. • Loudspeaker Cable, Load or Short Fault •... -
Page 5: Rear Panel Connections
Rear Panel Connections Amplifier and Speaker connections See Appendix C ♦ Eight individual input/output speakon connectors are located on the rear panel. ♦ Connections from the amplifier output are connected to terminals marked 1+ and 1- respectively. ♦ Connections to loudspeaker circuits monitoring low impedance only connect 1+ and 1-. -
Page 6: Calibration And Setup
Calibration and Setup ♦ Press the Set button ( top left ). Red led will illuminate. ♦ Select all channels on unit to be calibrated using buttons 1 to 8. ♦ Play audio source at Max SPL approx. Audio must be present for a period of one minute ( minimum ). -
Page 7: Ecm Calibration
Appendix A ECM Calibration The set button is used to calibrate the loudspeaker circuits. ♦ Press once and release ( Red LED will illuminate ) To calibrate channel N. ♦ Press the button below channel N. ♦ Play the audio source at max SPL for 1 minute. -
Page 8: Rs232 Connecting Details
Appendix B RS232 Connecting Details This is located on the front panel and provides a bi-directional RS232 port used to communicate with an IBM compatible PC. Pin 1 No connection Pin 2 Serial data receive (RX) Pin 3 Serial data transmit (TX) Pin 4 No connection Pin 5 Ground Pin 6 No connection... -
Page 9: Speaker Connections
ECM wiring This detection requires a pair of connections taken directly from the power amplifier and a second pair from the far end of the speaker line. - Page 10 It is essential that the speaker lines contain no spurs, as these will not be monitored, as shown below. This section un-monitored Amplifier E C M From Speakers C h a n n e l N The solution below is not recommended. Impedance changes on either section of speakers will result in two faults on the system.
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Page 11: Fault Detection
Detection wiring Low impedance monitoring requires the amplifier output to be routed through the ECM unit, as shown below. A u d i o s i g n a l M i x e r... -
Page 12: Fault Detection
Series/parallel circuits, shown below are monitored by this mode of detection. Audio signal Mixer E C M From Amplifier Speakers C h a n n e l N 20kHz oscillator Audio signal Mixer E C M From Amplifier Speakers C h a n n e l N 20kHz oscillator If using this method of monitoring for low level 100V line systems ( loading below... -
Page 13: Audio Connections 4 Wire System
Audio connections 4 wire system. E C M c h a n n e l c o n n e c t i o n s A m p S p e a k o n S p e a k o n C o n n e c t o r C o n n e c t o r Audio connections 2 wire system. -
Page 14: Event Input Description
The ECM has four opto-isolated inputs for monitoring external events. When the ECM is networked to either a SID or JNR ( refer to enclosed CD ) the events can be registered on an LCD display. All logged faults can then be printed or stored to a log file on a PC. - Page 15 Connectors Each group of four inputs is provided with a 9 -Pin female Dee-type connector. Pin 1 Input 1 + Pin 2 Input 2 + Pin 3 Input 3 + Pin 4 Input 4 + Pin 5 12V @ 50mA max Pin 6 Input 1 - Pin 7 Input 2 –...
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Page 16: Connections
Connections The diagram below shows how a voltage free contact should be wired. +12V In + Contact being In - monitored Using an external power supply. +12V 12V D.C. In + Contact power being supply In - monitored The Opto-diodes can be driven by active outputs as shown below +12V O p t o o f f = 0 v @ 0 m A O p t o o n = 1 2 V @ 1 5 m A... -
Page 17: Common Fault Relay
Appendix E Common Fault Relay The common fault relay is activated on detection of any fault. It could be used to enable a sounder or light indicator on detection of a fault, to alert an engineer of a fault on the system. Pin 1 Relay Wiper Pin 2 NC when not in fault Pin 3 NO when not in fault... -
Page 18: Optical Fibre Connectors
Appendix F Optical Fibre Connectors These are ST bayonet connectors operating at a wavelength of 820nm. The fibre length between units should not exceed 2km (with 2 couplers in line, i.e. for patch panels). To achieve the required fault tolerance twin fibres loops are used, these should be routed in physically divergent routes and opposite directions, as shown below. - Page 19 Manufacturers Information The ECM is manufactured in England by IKON AVS Ltd. Units may be branded IKON AVS or M+D Design. For service or warranty advice please initially contact your supplier. Alternatively contact the manufactures at:- IKON AVS Ltd Unit 238 Ikon Trading Estate...