Ecler NPA SERIES User Manual
Page 6
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3.3. Signal input connections
NPA Series rear panel has analog and digital inputs. Input selection is performed from the front panel
menu or from EclerNet Manager control software. Please refer to the EclerNet Manager software manual for more
information.
•
Analog inputs:
The signal input connectors are of XLR-3 type (19), electronically balanced. The pin assignment is as
follows:
HOT
or
direct
signal
>
Pin
2
COLD or inverted signal
>
Pin 3
GROUND
>
Pin
1
For unbalanced connection short-circuit pin 3 to pin 1.
The "STK OUTPUT" (18) are in parallel with the inputs and are used to supply the same input signal to
other amplifiers or sound systems.
The input impedance is 22K
Ω (balanced) with a nominal input sensitivity of 0dBV(1V). This impedance
makes possible to parallel several amplifiers without loosing audio quality.
•
Digital inputs:
There is an XLR-3 connector for AES/EBU digital input as well as a matching digital output to re-send this
signal towards other devices.
3.4. Output connections
The "OUTPUT" section on the back panel is provided with Speakon® connectors (23).
STEREO/PARALLEL/BRIDGE operating modes are selected from the from panel menu or from EclerNet
Manager control software. Please refer to the EclerNet Manager software manual for more information.
The connection cable that joins the amplifiers outputs and the loudspeakers must be of good quality,
sufficient section and as short as possible. This is most important when the distances to cover are long ones i.e. up
to 10 meters it is recommended to use a section not inferior to 2.5mm
2
and for superior distances 4mm
2
.
3.5. Ethernet port
An RJ45 connector allows connecting the equipment to an Ethernet network and its management from
EclerNet Manager software. Please refer to the EclerNet Manager software manual for more information.
3.6. RS-232 port
A DB9 connector for RS-232 allows a serial connection between the equipment and an external control
system, like AMX, Crestron, Medialon, etc. (non functional at the date of printing of this manual, will be available in
a future implementation).
3.7. FAULT connector
3 pins connector, potential-free closing contact (Normally Closed, Normally opened). Its status changes
when an internal amplifier failure is detected, placing this one out of service.