10
NLB 60E Operation Manual
6.4 NomadLink Wiring Notes
All NomadLink ports on the NLB 60E, as well as ports
on many NomadLink-equipped Lab.gruppen ampli-
fiers, are equipped with Neutrik EtherCon “XLR”
type connector housings. Connections may be made
with standard RJ45 connectors, or with the more
robust EtherCon connectors. The EtherCon housings
offer greater mechanical security and protection from
accidental damage.
For installations in the USA, all cables must carry the
VW-1 flame retardant rating (US National Differences
cl. 16.3).
When preparing custom Cat5 (Ethernet) cables for
the NomadLink application, all conductors in the
cable must be fully wired to the RJ45 connector. (No-
madLink uses conductor pairs that are not required
for a standard 100baseT Ethernet connection.)
6.5 NomadLink network cable
lengths
In installations where the NLB 60E is positioned at
some distance from the amplifier racks, or where
groups of amplifiers within a single subnet (up to 60
units) are located at some distance from each other,
the following general rules should be considered:
On the right side are typical examples of how
NomadLink network setups can be configured, with
maximum recommended distances shown:
•
Rule 1:
The maximum cable length in between any two
devices may not exceed 300 meters / 980 feet.
•
Rule 2:
In a non-closed-loop daisy-chained subnet the
total maximum cable length is 400 meters /
1300 feet.
•
Rule 3:
In a closed-loop subnet the total maximum
cable length is 700 meters / 2300 feet.
6.6 GPI Connections
The NLB 60E is equipped with three General Purpose
Input (GPI) connectors on the real panel. Using these
connectors, the NLB 60 can relay commands from
external sources such as power sequencers or alarms
systems, initiating amplifier functions such as power
on/off or mute/unmute.
Two of the GPI connectors are of the contact closure
type. The third GPI connector is the voltage sensing
type (24V). All three use two-pole Phoenix connec-
tors.
More information on programming of the GPI
functions can be found in the Operation section at
9.3.5.4.
6 connectIons to AMPLIFIeRs (noMADLInK)
