Lab.gruppen NLB 60E NomadLink - Manual (Page 22)

22 NLB 60E Operation Manual
Closed Loop detection also will be displayed in a sepa-
rate window following the device info displays:
If the configuration is set to detect a loop network
on the NomadLink side, and a loop is not present,
this will be reported as a fault. The Fault LED on the
front-panel of the NLB 60E will illuminate.
The Subnet Current display refers to the phantom
power on the NomadLink network. It can show as
either “OK” or “Too High”. The NLB 60E supplies the
phantom power to the subnet. If too many devices
are connected, or total cable lengths are excessive
(or a combination of both), this may cause excessive
current draw on the phantom power supply. This
condition will be reported as a fault on the front-panel
LED.
GPI1, Low HIgh
Power ON
GPI1, HIgh Low
Power OFF
GPI2, Open Close
Unmute
GPI2, Close open
Mute
The GPI displays refer to the General Purpose Input
(GPI) connectors on the NLB 60E’s rear-panel.
The GPI 1 is a Voltage sensing input, detecting states
above and below +12V DC. GPI 2 and GPI 3 are
identical contact closure inputs that detect an open
or closed state.
The GPI State displays indicate the current state of the
particular GPI port. GPI 1 can be either Low or High;
GPI 2 and GPI 3 can be either open or closed.
The other displays provide information on the func-
tion the particular GPI port is set to perform when
it changes state, e.g. from Low ➞ High or from
Close ➞ Open.
All GPIs can be set to perform Power On, Power Off,
Mute, or Unmute; or they can be disabled.
External equipment such as fire alarm systems or
power-sequencers can be connected and configured
using the GPIs.
For all GPIs, note that they will perform
changes only when their state is modified
(e.g. going from Low to High). As long as
a GPI remains in a static condition, the NLB
60E will not make any changes in amplifier status.
9.3.5 Configuration
The Configuration pages enable modification and
setup of all NLB 60E features.
GPI3, Open Close
Unmute
GPI3, Close open
Mute
9 oPeRAtIon AnD conFIGURAtIon