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RDU Mk2 Installation & Programming Manual Document No: LT0499
Programming Part 2
Page 7-34 8 April 2015 Issue 1.02
7.9 CONFIGURING AN RDU FOR AN MX1 PANEL
For Australian fire alarm systems, AS 1670.1 requires any remote fire brigade attendance
point display or mimic on an AS 7240.2 approved panel (which MX1-Au is) to include a Fire
Brigade Panel (FBP) compliant to AS 4428.3. As the RDU does not have an FBP, and its
functionality with MX1-Au is limited, the use of the RDU on MX1-Au is not recommended
(use a Remote FBP instead).
All the same, this manual does describe how to connect an RDU to the MX1 and some of
the issues involved for when the MX1 and RDU are used in other markets.
The AS 4428.1-style RDU (and the AS 1603.4 RDU with V5.xx firmware) can be used on
MX1 to provide remote annunciation and limited control functions to the MX1. Multiple RDUs
can be connected to the MX1’s RZDU connection to provide displays in different locations.
Each RDU can display zone and point alarms from the MX1, allow the zones to be disabled
and enabled, show zone faults and allow these to be reset. Zone test alarm and test fault
commands can be issued and reset from the RDU.
Other limitations in the use of RDUs on MX1 include:

Point enable/disable, test, reset, and analogue values are not available at the RDU.

System functions
– battery test, PSU voltages, system faults are not available at the
RDU.

If the Bell Isolate or Warning Isolate function is enabled on the RDU then there will be no
resounding of alarm devices (warning system) on new alarms. These functions disable
the Alarm Device output rather than only silence it (as per the Silence Alarm Devices key
on the MX1). If this function is enabled on the RDU, appropriate warning signs and
procedures should be employed.

The “Ack” function on the RDU is local only and does not silence the buzzer on the MX1.

The Silence Buzzer key on the MX1 does not “Ack” the RDU, nor silence the RDU
sounder.
When an RDU (AS1603.4 or AS4428.1 version) is connected to an MX1 Fire Panel, the
Legacy Bells (refer section 6.4.1.6) and FF Mode (refer section 6.4.1.1) parameters may
need to be changed from the defaults. As described in section 6.4.1.6, with regard to "Bells
Isolate", an MX1 panel behaves like an AS1603.4 panel and can send and receive Bells
isolate states/ commands to an RDU. The MX1 panel maps these to its "Alarm Devices
disable" status. This means that with an AS4428 RDU, it is necessary to map one of
Warning System or External Bell to Bells Isolate (using the Legacy Bells parameter) if the
MX1 Alarm Devices disable status is to be displayed and controlled at the RDU.