Nomadlink Network And Devicecontrol Software; Nomadlink Network In The Amplifiers; Connection And Setup - Lab.gruppen C Series C 16 4 Operation Manual

7 OPERATION AND PERFORMANCE
7.6.4 Performance, Warning and fault
indicators
(green) indicates that mains power
• Power on/off
is switched on.
(blue) indicates that the network
• NomadLink
is connected. The NomadLink LED will light up
even before the mains power is connected and
switched on as it takes phantom power from the
network cable.
Bridge mode (yellow) indicates if two chan-
•
nels are bridged using the DIP-switch on the
rear-panel.
• CPL, Current Peak Limiter (orange), when flash-
ing indicates the maximum possible current draw
has been reached.
• CPL, Current Peak Limiter (orange), when con-
stant indicates excessive current draw caused
by a short circuit on the output or very low op-
erational impedance. When detected, the output
will mute for 6 seconds before re-measuring the
output impedance. This will continue until the
short circuit is removed. CPL remains constant
orange in a fault condition only when an input
signal is present.
• Temperature (yellow) warning is indicated by a
flashing LED. If the amplifier goes into thermal
protect (output muted) the LED illuminates
constant yellow.
• Vhf, Very High Frequency protection (yellow),
indicates that potentially harmful continuous high
frequencies have been detected on the input
signal. The output is muted.
• PAL , Power Average Limiter (red), indicates
that the amplifier is limiting because the power
supply and/or the mains inlet fuse has reached
maximum capability.
• hardware fault is indicated when both the CPL
and VHF indicators light up simultaneously. The
amplifier requires servicing before placing back
in operation.
22 C Series C 68:4, C 48:4, C 28:4 and C 16:4 Operation Manual
7.7 NomadLink network and
deviceControl software

7.7.1 NomadLink network in the amplifiers

All C Series amplifiers are equipped with the pro-
prietary NomadLink network interface. This includes
two EtherCon-housed RJ45 connections: one IN
and one OUT.
Use standard straight Cat-5 Ethernet cables with
RJ45 connectors to connect the amplifier to the NLB
60E or to daisy-chain multiple amplifiers.
It is very important that two IN or two OUT
ports are NEVER connected to each other.
This will cause the NomadLink communi-
cation and DeviceControl software to
exhibit erratic behavior and display inaccurate data.
However, this situation will not damage the
amplifier circuitry.
Up to 60 amplifiers can be connected to one NLB
60E in a daisy-chain or closed loop.
When the NLB 60E is powered up, the NomadLink
network receives phantom power. This causes the
blue NomadLink LED on the amplifier front-panel
and the NomadLink LED on the rear-panel to light
up. NomadLink is active even when the amplifier has
mains power disconnected or is not yet powered
up.
The amplifier does not have a stand-by power
supply for the network. The network is solely
powered from the NLB 60E. Should an amplifier fail
or be inadvertently disconnected from the mains,
network integrity is fully maintained and all amplifiers
C Series C 68:4, C 48:4, C 28:4 and C 16:4 Operation Manual 23
OPERATION AND PERFORMANCE 7
remain visible on the system.

7.7.2 Connection and setup

The NomadLink network requires use of an NLB
60E NomadLink Bridge & Network Controller. The
NomadLink network is established by connecting the
NLB 60E OUT port to the first amplifier's IN port.
Then a daisy-chain is established by connecting the
first amplifier's OUT port to the next amplifier's IN
port, and so on. If a closed loop network is desired
for improved redundancy (highly recommended), the
last amplifier's OUT port must be connected to the
NLB 60E's IN port.
For all connections, straight Cat-5 RJ45-equipped
Ethernet cables should be used.
Optimal NomadLink performance can only
be assured when using Cat-5 cables.
However, as NomadLink is only using two
wires plus ground for communication and
phantom power it is possible to create converters
from RJ45 to, for example, XLR connectors using
2-wire shielded cable. The NomadLink network can
then be operated using a standard tie-line in a
multicore signal distribution system. See the drawing
opposite for an example of how to create a
converter.
If any cable format or connection other than
Cat-5 (or better) and RJ45 is utilized, net-
work performance may be compromised.
In this event Lab.gruppen cannot guarantee
that the NomadLink network will be fully opera-
tional.