Cadac R-Type - Manual (Page 25)

3-11
Revision R2005-2 R-Type
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Where a console comprises 4 or more frames, the power supplies 8019 & 8020
MUST be used. 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.
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The 8019 ±18v unit and the 8020 +13v/48v unit are based on two PowerOne PSUs
each with additional circuitry as shown on CADAC drawings C3.8393 (8019) and
C3.8392 (8020).
The a.c. inputs are connected to the PSUs via two 3-core cables, CMA reference
3183TQ – BASEC approved, rated at 20A.
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If replacing a switch-mode power supply unit is required, please note the following:
■ ■ ■ ■ Make sure that the power supply system’s power switches are in the position
OFF and disconnected from the mains.
■ ■ ■ ■ The work should only be carried out by a suitably qualified electrician.
■ ■ ■ ■ Be careful to observe correct polarity when connecting the new PSU.
■ ■ ■ ■ Note that a console must never have one voltage without the other, for example
+18V must never be fed into the console without -18V.
When switching the power supply system back ON after replacement has taken
place, make sure that both LEDs on the front of the PSU-system come on. If only
one LED comes on, let go of the ON push-button immediately. Failure to do so may
lead to fire hazard and major damage to the console.
FIG 3-17. 8019 PSU
FIG 3-18. 8020 PSU