Connecting the mixer systems
1-3
Revision B2005-2
B-Type
The a.c.-input connectors on each power supply unit have three conductors: ‘LIVE’
(brown), ‘NEUTRAL’ (blue) and ‘EARTH’ (yellow/green). For safety and electromag-
netic compatibility considerations, it is essential that the ‘EARTH’ conductor is con-
nected on all PSUs and the a.c. supply has an ‘EARTH’ conductor that has a
continuous circuit to the “zero-signal reference potential” point in the building. The
ZSRP point in a building is usually found near the place where the a.c. ‘mains’ supply
enters the building (often referred to as the “MAIN GROUND REFERENCE EARTH
ELECTRODE SYSTEM”). The basic concept for correct a.c. mains wiring distribution
is shown in figure 1-1. If you need further information about this complex subject,
please refer to “Grounding Systems and their Implementation” by Charles Atkinson
and Philip Giddins published in the AES Journal Vol. 43, No. 6 – June 1995.
The grounding scheme in CADAC consoles is designed to meet the rigorous EEC
Electromagnetic Compatibility
requirements (EMC Directive - 1996). Any RF noise
induced in the console frame(s) is directed to the “local” ZSRP, which is the metal-
work of the power supply units. In order to take full advantage of the “RF noise immu-
nity” capability of the CADAC system, PSU a.c. mains cables and the a.c. mains
supply EARTH conductor must be connected correctly.
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CADAC power supply units are designed to run from a minimum of 208 V up to a
maximum of 260V, 50/60Hz a.c. In many parts of the world the normal a.c. single-
phase supply is 100-127V, this means that the CADAC power supply units must be
connected across two of the phases in the three-phase a.c. supply, see 1.3.4 Con-
necting to a 3-phase outlet.
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CADAC 8019 and 8020 switch-mode power supply units are designed to run from a
minimum of 208V up to a maximum of 260V a.c, 50/60Hz.
The 8019 “18V” unit is rated at 100A per rail and the 8020 “13V” unit is rated at 100A.
See also Appendices,
B. Switch-Mode Power Supply Units
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The older version of 8019 ±18v unit is based on two ADVANCE F20006 ‘power-
blocks’, with additional circuitry as shown on CADAC drawing number C3.8015. The
new version is based on PowerOne PSUs (serial number 34949 onwards).
The a.c. input is connected to the PSU via a 3-core cable, CMA reference 3183TQ –
BASEC approved, rated at 20A.
FIG 1-3. 8019 power supply unit
Summary of Contents for B-Type
Page 1: ...Audio Mixing Console 056 6 10 n 95 4 1 07 g8 2...
Page 6: ...vi General Precautions B Type Revision B2005 2...
Page 8: ...viii Introduction B Type Revision B2005 2...
Page 48: ...2 20 Central Control Module 7896 B Type Revision B2005 2...
Page 86: ...6 10 Group Module 7756 B Type Revision B2005 2...
Page 96: ...7 10 Grand Master Group module 7795 B Type Revision B2005 2...
Page 106: ...9 4 Auxiliary Output Module 7468 B Type Revision B2005 2...
Page 122: ...11 10 Osc Comms PFL module 7758 M Type groups B Type Revision B2005 2...
Page 130: ...12 8 Osc Comms PFL module 7635 F Type groups B Type Revision B2005 2...
