F3200 Operator's Manual Document No: LT0119
Network Systems
Page 11-4 29 July 2002 Issue 2.04
11.2 NDU - NETWORK DISPLAY UNIT
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 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 panel, 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.
Section 4.1.1 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.
NDU in New Zealand Mode
An NDU can be programmed to operate in either New Zealand mode or Australian
mode. New Zealand mode operation is not available on an F3200 panel.
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