Ecler NXA SERIES - Manual (Page 7)

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3.4. Output connections
The rear panel OUTPUTS section is fitted with two position screw terminal block (9) for each amplifier
channel (4 or 6, depending on model). Always respect the relative polarity for outputs (+ and - on each output
connector), wiring and speakers. In bridge mode, follow the wiring and polarity standard indicated near the output
screw terminal block and labeled as "BRIDGE".
SINGLE / PARALLEL / BRIDGE operating modes are selected from EclerNet Manager control application.
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 and RS-232 ports
An RJ-45 connector (12) allows the connection to an Ethernet network and its management from EclerNet
Manager application, or its control from a third party equipment, thanks to the TP-NET external control protocol.
A 3-pin Euroblock connector for the integrated RS-232 (11) interface also allows the device remote control
using the TP-NET protocol.
Refer to the EclerNet Manager manual and TP-NET protocol for more information.
3.6. GPI remote control ports
The NXA series rear panel provides 4 or 6 (depending on the model) 0-10VDC remote control ports (13),
labeled "GPI 1-6", to which you can connect analogue devices such as the WPm series wall panels. With the EclerNet
Manager application, a function can be assigned to each of these ports: a GPI port can control one or more inputs or
outputs (volume) or manage the presets #1-5 recall (GPI-1 only).
The level of each amplifier channel or output volume is determined by the sum of values of:
 its front rotary control (if it has one assigned)
 its channel fader (slider) (in EclerNet Manager)
 its GPI remote control port (if it has one associated with its volume control)
3.7. Connecting the GPI remote control ports
By linking a remote port to a volume control, the amount of attenuation applied to the assigned input(s) or
output(s) can be determined using three types of external devices:
a) A potentiometer with a nominal value between 10k  and 50k (e.g. WPM series wall panels).
b) Using a device that generates a control voltage from 0 to 10V DC.
c) Using remote relays/dry contacts.
NOTE: You can connect up to 16 remote control ports in parallel to the same hardware control
potentiometer. Ground connections of all devices those ports belong to must be joined.
The connection cables can be up to 500m long if a section of 0.5mm 2 is used.
Consult the available accessories at your ECLER dealer or at www.ecler.com.