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RDU Mk2 Installation & Programming Manual Document No: LT0499
Programming Part 1
Page 6-28 8 April 2015 Issue 1.02
6.4.4.3.5 Pass-on/ follow/ local options for Bells Relay Operate (AS1603.4 mode)
Only the "follow" parameter is meaningful - the pass-on and local parameter settings are not
used for anything. If the "follow" parameter is set true then (for a MAF RDU), the Bells relay
at the RDU will be activated (if not isolated) when the Bells relay at the FIP is activated. This
requires an AS1603.4 type of FIP.
6.4.4.3.6 Pass-on/ follow/ local options for Ancillary Isolate (AS4428.1 & AS1603.4)
Australian Mode
The pass-on, follow and local parameters for ancillary isolate determine how isolation of the
ancillary 1 relay at the RDU is handled and whether ancillary isolate/ de-isolate commands
are sent to the FIP or not.
Pass-on
If "pass-on" is enabled, the RDU will send an ancillary isolate/de-isolate command to the FIP
when an ancillary 1 isolate/ de-isolate command is initiated at the RDU. The effect of this
command depends on the type of FIP. For an F4000/ MX4428 FIP, ancillary (zone zero)
isolate or de-isolate occurs. For an F3200 type FIP the command is ignored by versions
V1.10 or earlier. F3200 FIP software version 2.00 or later perform a Plant Isolate/De-isolate.
For a non-MAF RDU with an AS1603.4 keypad and pass-on enabled, when the ANCIL ISOL
key is pressed, an isolate/ de-isolate command is immediately sent to the FIP without any
additional prompt on the display.
Follow
If "follow" is enabled then the ancillary 1 relay at the RDU is isolated if the "received FIP
ancillary isolate state" is isolated. For an F4000/MX4428 FIP, the "received FIP ancillary
isolate state" is the isolate state of ancillary zone zero. For an F3200 FIP version 1.10 or
earlier, it is the state of the ancillary isolate led at the F3200 front panel. For F3200 FIP
V2.00 or later it is the "Plant Isolate" status.
NOTE - during a system test (but not daily auto
test) an F4000/ MX4428 FIP sets ancillary zone zero to isolated.
Local
If "local" is enabled then the ancillary 1 relay at the RDU can be isolated or de-isolated
locally at the RDU.
AS1603.4 Ancillary Isolate LED
An AS4428 RDU does not have an ancillary isolate LED. For an AS1603 RDU, the ancillary
isolate LED indicates as follows.
On steady
- if either anc 1 or anc 2 relays are locally isolated.
Flash at 1HZ - if the ancillary 1 relay is isolated because the FIP is sending an
ancillary isolate state or, for NZ operation, if FIP BSR is asserted.
Flash at 2HZ - For New Zealand operation, if the local BSR input is asserted.
Ancillary Isolate Operation for New Zealand Mode
The operation for New Zealand mode is slightly different to Australian mode because NZ
mode may have a building services restore (BSR) key-switch at either the RDU or FIP which
can be used to isolate all the ancillary outputs at the RDU if programmed to. New Zealand
mode also has ancillary fire and ancillary defect outputs on the Display Extender Board
which can also be isolated. For New Zealand mode, in addition to the ancillary isolate pass-
on, follow, local parameters, there is a separate set of pass-on, follow, local parameters
associated with the BSR keyswitch and all six parameters determine how the ancillary relays
and outputs at the RDU and FIP are isolated.