Opus Technologies LD 1.0, Installation And User Manual

Page: 14 / 36

14
4.6 Adjustment and connection
4.6.1 Loop connection
The loop is connected via a green 2-point terminal
block located on the rear panel of the amplifier,
thanks to a twisted cable.
Distance between the loop and the
amplifier must not exceed 15 m.
The twisted cable cancels the magnetic
field and avoids inductions potentially created by
transformers external to the system. The references
OP-LI5/10 or 15 allow to create this type of
connection.
4.6.2 Audio inputs
The audio sources are connected via the 3 inputs
of the amplifier provided for this purpose. The
LD Series have 3 inputs:
• Input 1: 100 V
• Input 2: lines or microphones
• Input 3: lines or microphones
The loop circuit must use cabling conforming to the
IEC-60332-1-2, 60332-1-3, 60332-2-1, 60332-2-2 or
60695-11-21 standards.
4.6.3 Priority INPUT 1 100V input
The INPUT 1 (100V) of the LD series amplifiers has a
priority for security sound systems in case of
evacuation of the building.
If more than one audio source reaches the
amplifier's inputs, the priority input will always have
priority over the others, and the INPUT 2 and/or
INPUT 3 will be muted. In some cases, and if the
configuration allows it, we recommend connecting
the room sound system to INPUT 2 and INPUT 3 and
the security sound system to INPUT 1.
4.6.4 Input and outputs jack 6.35
4.6.5 Line output
It is possible to connect a recorder to the line output
of the loop amplifier. The line output of the amplifier
is a 6.35 OUT 0° jack which is mainly used to link
several amplifiers when setting up complex systems
(low spill system) but the output can also be used as a
single line output.
4.6.6 Power supply
The LD amplifiers have an integrated power supply of
230V (or 115V), with a power of 300VA.
4.6.7 Status relay
The status output is used to send a status of the loop
amplifier to external devices via a NO/NC relay.
4.6.8 Connectors
Symmetric:
Pin 1 :
Pin 2 :
Pin 3 :
Mass/Ground/ Schield
Hot spot(+)
Cold spot(-)
Asymmetric:
Pin 1 :
Pin 2 :
Pin 3 :
Mass/Ground
Signal (+)
Connected to mass (pin 1)
3 pin-XLR
PUSH
2 1
3
Hot spot Cold spot Mass
6.35 mm jack
On the rear panel of the amplifier you can see three
6.35 jack inputs. These inputs and outputs allow you
to connect several loop amplifiers together to create
single phased loop systems, low loss systems or ultra
low loss systems.
Refer to the types of connection in paragraph 4.7 and
the different types of installation in paragraph 6.
LD Series | Installation and user manual
User manual