Detcon FL-10 - Manual (Page 7)

2.9 O THER F EATURES
Model FL10 control modules include other features which are discussed below.
2.9.1 PolySwitch Overcurrent Protection
Model FL10 control modules incorporate PolySwitch overcurrent protection components that act as resetable fuses. The
PolySwitch circuit protector is a positive temperature coeff icient resistor that undergoes a large, abrupt change in resis-
tance when an overcurrent or high temperature heats it above a specif ic point. Normally just tens of milliohms, the
resistance of the PolySwitch protector increases orders of magnitude when switched. This increase limits current to several milliamps.
When the current or temperature fault that caused the device to switch has been substantially reduced, the PolySwitch
device resets, allowing normal circuit operation to resume. The protector requires no manual resetting or replacement.
Four separate Poly Switches monitor and protect the following circuitry: the 4-20 mA signal input loop, the 4-20 mA
output signal loop, the 24 VDC input power loop, and the 24 VDC output power loop to the sensor.
2.10 C ONTROLLER C ALIBRATION
The 4-20 mA output of the Model FL10 control module is calibrated at the factory and should require no further adjust-
ment. If under some special circumstance calibration is required, contact Detcon for assistance.
2.11 W
ARRANTY AND
S
ERVICE
P
OLICY
Detcon, Inc., as manufacturer, warrants each new Model FL10 series digital electronic control module to be free from
defects in material and workmanship under intended normal use for a period of two years from date of shipment to the
original purchaser. Detcon, Inc., additionally provides for a f ixed fee repair/replace service policy which covers Model
FL10 series digital control modules for a period of f ive years. The f ixed fee service policy shall affect any necessary fac-
tory repair for the period following the one-year warranty period and shall end f ive years after expiration of the warran-
ty. The f ixed policy rate is $75.00 per control module, per transaction, during the period of the policy. The policy is
FOB Detcon, Inc., The Woodlands, Texas.
Model FL10 Single Channel Flame Detection Control Module PG.7
Shipping Address: 3200 A-1 Research Forest Dr., The Woodlands, Texas 77381
Mailing Address: P.O. Box 8067, The Woodlands, Texas 77387-8067
phone 888-367-4286, 281-367-4100 • fax 281-292-2860 • www.detcon.com • [email protected]