Cadac F-Type - Manual (Page 17)

Connecting the mixer systems 1-9
Revision F2005-2 F-Type
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CADAC 8400 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 8400 is rated thus +13V@92A, ±18V@44A and 48V@5A.
The a.c. input is connected to the PSU via a 3-core cable, CMA reference 3183TQ –
BASEC approved, rated at 20A.
The 8400 unit is based on one POWER ONE RPMS-ETETGDGD1ETK Power block,
with additional circuitry as shown on CADAC drawing number C3.8397.
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Each 8400 switch-mode power supply provides the following outputs: 13v, ±18v and
48v. Each PSU is fitted with a front panel mounted 9-way 'D-type’ connector labelled
‘Connections for Remote Start’. If a remote start facility is used, Power Failure and
Over-Temperature LEDs may also be fitted with the remote start switches if required.
Fig 3-15 shows the circuit for starting up a “system” with a single switch. This has
proved to be the most popular method of connecting the remote start facility. This cir-
cuit can easily be extended to provide a single switch remote for all four PSUs if
required. If muliple switches are to be used, see fig 3-14.
NOTE:
■ ■ ■ ■ The remote start switch must be a ‘momentary’ type. You can use 3 separate sin-
gle pole switches for each Power Supply to turn on 13v,±18v and 48v outputs of the
PSU alternatively use one single pole for the whole lot.
■ ■ ■ ■ The remote switch(es) must be mounted on a metal panel.
■ ■ ■ ■ Use shielded cable for the remote switch wiring.
■ ■ ■ ■ The 9-way ‘D-type’ free plug must have a conductive shell. This is to ensure that
the cable shield connects directly to the PSU unit chassis.
■ ■ ■ ■ Connect the cable shield to the metal panel where the remote switch(es) are
mounted.
FIG 1-10. 8400 power supply unit.