Noby UK Noby-220iR2 2-Zone - Manual (Page 10)

Noby-220iiiiR2 Installation Manual Page 10 Software Revision1-0
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iiii nterlink data bus
(Terminal 3)
The iiiinterlink data bus has been laboratory tested with up to 1km of standard low-grade alarm cable
(92mohm/m 160pF/m), connected in different configurations i.e. linear, star, clustered etc.. These tests were
conducted in a simulated electrically noisy environment, but we appreciate that real world installations can
be more harsh and varied. We therefore specify that the maximum installed iiiinterlink cable length is
250m, which provides a four fold safety margin. Installations exceeding 250m are not guaranteed by
Noby UK and are undertaken at the installer's risk.
The overiding limiting factor is that the total installed cable capacitance must not exceed 100nF i.e. the
pF/m multiplied by the total length of cable used. Also, the total circuit resistance must not exceed
100ohms (or 50ohms per leg). Wherever possible avoid running the cable in close proximity to transmitter
devices, or in conduits containing potentially noisy electrical cables. Screened cable may provide some
immunity in excessively noisy environments (e.g. near RF transmitters etc.) - with the screen connected to a
good clean earth at one point only on the system.
The data connection is low speed and there is little advantage to be gained in using more expensive high
speed data cable, although national regulations might stipulate the use of flame retardant cable. The
protocol is fail safe, meaning that in the event of a cable burn-out all remote panels will continue performing
according to the last signal received, and at the very least they will continue to function as standalone fire
control panels.
If this is your first Noby-220iiiiR2 installation then it is highly recommended to familiarise yourself with the
system and program the addresses on the work bench, rather than on site with the panels distributed across
8 properties.
iiii nterlink Programming
As supplied from the factory the iiii nterlink is disabled and the Noby-220iiiiR2 defaults to offline, acting as a
single standalone fire control panel. To enable the iiiinterlink connection each Noby-220iiiiR2 panel must be
programmed with a UNIQUE address according to the procedure set out below.
The addresses can be programmed with the panels online or offline, whichever is the more convenient.
Online 'live' programming guarantees that all addresses are unique since the system seeks free address
slots. You may start with just one panel, and then add further panels one by one, each time programming
the address at the newly added panel. The system allocates the next available address number, such that
the address numbers 1 to 8 are programmed according to the order in which the panels are added.
Offline (manual) programming requires a more methodical approach, and carries a greater risk of
duplicating one or more addresses.
The possibility of duplicating addresses exists where panels are either pre-programmed off-site or
swapped from another system. The symptoms of a duplicated address are not always immediately
obvious, although in most circumstances a Bus Error Fault will be indicated.