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F3200 Installation & Programming Manual Document No: LT0122
Network Programming
Page 11-22 5 July 2001 Issue 2.7
11.11 NDU OPERATION
An NDU can be thought of as an F3200 FIP without any alarm zone modules or relay
modules. An NDU also has an option of MAF board present/not present.
An NDU can be programmed to operate in “New Zealand” mode rather than the default
Australian mode. New Zealand mode operation is described in Chapter 12.
An NDU without a MAF board is physically quite small, convenient to use, and is powered
from an external source. An NDU with a MAF board may perform brigade signalling
functions and also has ancillary and bell relays.
Even though an NDU does not have any 8 zone or 8 relay modules, it does have 16 alarm
zones. The local MCP (or connected RDU MCP), if any, may be mapped to any one of
these 16 zones. Each of the 16 zones may be isolated, de-isolated, or reset, but cannot be
tested. Each zone can be programmed as latching/non-latching, MAF/non-MAF, etc. Even
though an NDU zone which does not have an MCP mapped cannot go into alarm, it may be
useful as an object which can be isolated or de-isolated.
Otherwise an NDU will perform all the functions of an F3200 panels, including
sending/receiving network zone commands, network event printing, and FFCIF alarm
display.
An NDU may be programmed with output logic, the same as F3200, and may send and
receive network logic variables on the network.
An NDU without a MAF board may still perform functions of Bells or Ancillary Relay
Isolate/De-Isolate/Test, and the output logic tokens associated with these may be used so
that these conditions can be accessed from other panels.
An NDU without a MAF board may be used to do Bells Isolate operation, and, with
appropriate programming, may be used to silence the bells throughout the network, or it can
be used just to display the Bells Isolate/Network Silence state of the network.
The keypad on an NDU without a MAF board is physically accessible all the time, but when
the cabinet is locked the NDU software disables the keypad even though the keypad is
physically accessible.
The operation of the Bells Isol and Ancil Isol keys may be disabled as described in Section
6.4.4.
Section 4.1.1 of the F3200 Operator’s Manual describes the interpretation of the front panel
LEDs on an NDU.
If an NDU is programmed to use the totals sent by another device on the network, then the
NDU will turn its buzzer on if a new MAF fault, Standby condition or new System fault occurs
on the remote device.
Programming an NDU
All of the programmable network parameters listed in Table 6.4.1 Chapter 6 and section
11.13 are relevant to an NDU with the following points to note.
MAF board present/not present
The MAF board must be programmed as present or not present. This is done by selecting
System Config from the main programming menu and then option 3:Modules.