Technical / Programming Manual
FT128 Rev 2.2
31
5 Optional Modules
5.1 AS1668 Fan Control
Used for Application board type Fan control (SUB902) which has a front decal label to
indicate and control of up to four fans. Typical fan control front is shown in Figure 12 page
36.
Each fan control module consists of a universal I/O matrix 4582 specifically configured for
fan control applications and application board SUB902. Different Programming options are
simplified through the EBLWin configuration software.
Each fan control module has controls and fan status indicators for 4 fans. Each fan status
is indicated by six LEDs (On / Auto / Off / Running / Stopped / Fault) and controlled via
three push buttons (On / Auto / Off). One "Fan Reset" button is provided in every AS1668
fan module. A LED test button is also provided to test LED’s for each fan module (if
programmed).
In EBLWin, the functionality of the fan control relays Re0 & Re1 in “3361 for fan” module
has been improved
. New “Enhanced mode” is added to 3361 configuration to enable the
programmer to configure Re0 and Re1 independently i.e. start relay and stop relay are now
configured separately. The monitored input In0 is in use when the fan is only controlled
from the CIE. External control from Mechanical Services Switch Board (MSSB) or via time
clock will indicate the fan status without generating a fan fault.
5.1.1 Mode Control
The buttons / LEDs On, Auto and Off are used to manually override the fan mode of
operation. The switches are non-latching and the mode of operation will be indicated by
the corresponding LEDs.
On: Fan is running in manual override mode independent of the fire mode in the CIE
or any external control e.g. MSSB. “On” and “Fan Running” LED’s are lit. “On”
control has higher priority over alarm and external control.
Auto: Fan either be running or stopped depending on the CIE alarm condition. The
fan may also be controlled externally (less priority than alarm) from mechanical
services e.g. time clock. LED “Auto” is lit and either “Fan Running” LED or “Fan
Stopped” LED is also lit. The “Auto” LED flashes during the time that the fan is
changing status (running to stopped or stopped to running) then becomes
steady.
Off: Fan is stopped in manual override mode independent of any alarm condition in
the CIE. “Off” and “Fan Stopped” LED’s are lit. “Off” control has the highest
priority over alarm or external control.
5.1.2 Fan Status
Running Indicates fan running, red
Stopped Indicates fan stopped, green
Fault Indicates fan fault, yellow
The fan fault LED is lit if the control from the CIE to change the fan status (via
3361 relay contacts) is not verified via input In0. The request to change the fan
status from the CIE can be due to one of the following:
1. Manual operation of the manual override switch (On or Off) for a fan or
In Win128, the two relays Re0 and Re1 have toggle action i.e. cannot be controlled independently, both activated at the same
time but with different contacts (Re0 is normally open & Re1 is normally closed).
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