Cloud Electronics 46-50 - Manual (Page 17)

46-50 Installation and User Guide V1.0 17
Speaker outputs (100/70 V-line
operation)
The 46-50 may be converted for 100/70 V-line operation by
the use of the Cloud CXL-4160 transformer module. This
module is fitted internally, and consists of four independent
transformers with separate flying leads, so any or all outputs
of the 46-50 may be converted to 100 V and/or 70 V-line
operation as required.
The low-impedance outputs are still active, but
should not have a load connected to them while
the 70 V/100 V-line outputs are in use.
In the 46-50T model variant, the CXL-4160 is pre-installed
at the factory, and wired for 70 V-line operation. This can
be changed to 100 V-line operation (per-output) if wished
by moving on-board links. Alternatively, the standard
46-50 model may be modified for 100/70 V-line operation by
retrofitting the CXL-4160 module, which is available from
Cloud Electronics as an option. Full installation instructions
are supplied with the module.
When the CXL-4160 is fitted, an 8-pin parallel entry screw-
terminal connector occupies the blank connector slot [13] at
page 12. The connector is wired as shown below:
Panel marking Connect to:
1 Z1- Zone 1 output ‘-‘
2 Z1+ Zone 1 output ‘+‘
3 Z2- Zone 2 output ‘-‘
4 Z2+ Zone 2 output ‘+‘
5 Z3- Zone 3 output ‘-‘
6 Z3+ Zone 3 output ‘+‘
7 Z4- Zone 4 output ‘-‘
8 Z4+ Zone 4 output ‘+‘
If preferred, individual external transformers may be employed
to convert outputs for 100/70 V-line operation. A suitable
transformer is the CXL-40T, available as an accessory from
Cloud Electronics. A 19” rack tray for mounting multiples of
these is also available.
When using the 46-50 for 100/70 V-line operation, the 65 Hz
high-pass filters in each zone to be used in this mode should
be enabled. See page 18 for full details.
Auxiliary line outputs
In large zones, it may be necessary to use additional amplifiers
to obtain the necessary power to drive a greater number of
loudspeakers, or to drive some loudspeaker types requiring
high power levels than the 50 W available from the 46-50’s
channels. To permit the connection of further amplifiers (or
any other equipment), unbalanced outputs from the 46-50’s
pre-amplifier sections for Zones 1 and 2 are available at the
rear panel phono (RCA) connectors labelled
AUX OUT
Z1 & Z2.
All Zone1 and 2 controls and settings on the front and rear
panels (levels, source selection, priority settings, etc.) affect
the Auxiliary line outputs. However, note that their source is
pre the switchable 65 Hz high pass filters, thus any additional
amplifiers connected at the
AUX OUT outputs would need
to have hi-pass filters applied if they were being used to drive
100/70 V-line circuits.
Music Mute
External muting of music is available at the MUSIC MUTE
connector. National or Local Authority regulations governing
such systems may require that normal programme material
(i.e., music) should be muted in an emergency, to ensure that
any emergency messages are clearly audible.
The Music Mute input is on a 2-pin 5 mm-pitch screw-terminal
connector. It should be connected to the appropriate alarm
output on whichever building management system registers
the alarm (typically the Fire System). The alarm output must
be volt-free; if no such output is available, an intermediate
relay or other isolation device must be installed between the
alarm output and the Music Mute input.
REMOTE MUSIC MUTE TERMINATIONS
1 2
MUSIC MUTE
INPUT
R
E
LA
Y
NORMALLY OPEN (NO)
CONNECTION
1 2
MUSIC MUTE
INPUT
R
E
LA
Y
NORMALLY CLOSED (NC)
CONNECTION