Detcon FL-10 - Manual (Page 5)

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All alarms relays — alarm 1, alarm 2, and fault — can be switch programmed as normally energized or normally de-ener-
gized. The standard is de-energized. However, a relay can be programmed as energized to provide application specif ic
features. A normally energized relay will de-energize when in alarm. A typical application of the energized conf iguration
is to have the fault relay normally energized so that in the event of a power failure to the control module card, the fault
relay will de-energize causing its relay contacts to change state, thereby creating a fault output.
It must be noted that when an alarm relay is jumper programmed as normally energized, the contact outputs, normally
open and normally closed, become reversed. The normally open contact becomes the normally closed and vice versa.
Reconf iguration of the contact output jumpers may be required.
To program an alarm for normally energized operation, slide its corresponding switch to the “on” position. For normal-
ly de-energized operation slide the switch to the “off” position. The switch locations are as follows: fault – SW2-1, alarm
1 - SW2-7, and alarm 2 – SW2-4.
2 2..3 3..3 3 A Assc ce en nd diin ng g o orr D De essc ce en nd diin ng g A Alla arrm mss
Alarm 1 and alarm 2 can be switch programmed to operate during ascending or descending gas conditions. For f lame
detection this will always be set for ascending.
To program an alarm for ascending gas conditions, slide its corresponding switch to the “on” position. For descending gas
conditions slide the switch to the “off” position. The switch locations are as follows: alarm 1 - SW2-6, and alarm 2 – SW2-3.
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An alarm reset switch (SW1), located on the control module face plate is used to reset alarms that have been pro-
grammed as latching. Once alarm conditions have cleared, alarms may be reset by simply pushing the momentary
switch and releasing it.
Remote reset outputs are also a feature of the Model FL10 control module. This feature is available when used in con-
junction with Model FL10 compatible control enclosures and mainframe motherboards.
2.4 C
ONTROLLER
O
PERATION AND
M
ENU
S
ELECTIONS
Upon applying power the controller will then enter normal operation mode. There is a 15 second period after power-up
in which alarms are ignored.
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Besides acting as an alarm reset, the front panel switch is used to test the alarm relays. To activate the test, hold the
switch for 10 seconds. Both alarm relays will then activate for 5 seconds and then clear.
2.5 P OWER I NPUT O PTIONS
Standard operating input power of the Model FL10 control module is 24 VDC unless 12 VDC is specified at time of order. All
of the circuitry of the Model FL10 control module, with the exception of relays, will operate on 12 or 24 VDC.
A 24 VDC control module can be converted to a 12 VDC control module by changing the relays. If this is desired, it is
recommended that the control modules be returned to Detcon to be converted. However, if technical personnel are
used, the 24 VDC relays (OMRON #G6B-2114P-US-DC24) may by replaced by 12 VDC relays (OMRON ##G6B-2114P-
US-DC12) at the owner’s discretion. Caution: note that the only identif ication for required input power is the labeling
on the alarm relays.
2.6 A NALOG 4-20 M A S IGNAL I NPUT /O UTPUT
The Model FL10 receives an analog 4-20 mA signal input. The signal is processed through an analog to digital converter
and is calibrated so that a 4 mA input will provide a 4 mA output and a 20 mA input will provide a 20 mA output.
This circuitry is factory set. Should adjustment become necessary, refer to the controller calibration section (section
2.10).
Model FL10 Single Channel Flame Detection Control Module PG.5