Cadac C-Type - Manual (Page 12)

1-6 Connecting the mixer systems
C-Type Revision C2005-2
41717 5HPRWH#VWDUW#RI#;733#368
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 1-8 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 four all four PSUs if
required.
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 start switch(es)
are mounted.
Great care must be taken with the wiring of the switch(es) to ensure that no short-cir-
cuits can occur between any two power supply units.
FIG 1-7. Remote start with multi-
ple switches
FIG 1-8. Remote start with a single
switch