Model FS24X
™
Fire and Flame Detectors
INSTALLATION GUIDE and OPERATING MANUAL
Fire Sentry Corporation
Document No. 6178-001 - Rev. Q
© Copyright 2011
All Rights Reserved
Page 18
4.3
Digital Communication Options
The FS24X Detectors have a variety of RS-485 Digital Communication options that can be selected using its
Rotary Switch SW3.
SW3 Position
Outputs
0
4-20mA Current Sinking
1
4-20mA Current Sourcing
2
ModBus RTU
3
Reserved for Factory Use
4
FireBus
II
5 through 9
Reserved for Factory Use
4.4
Test Lamps
Some manufacturers claim that their detectors do not need remote testing with an external Test Lamp
because it tests itself. Even though Fire Sentry Detectors also perform “through the lens” self-testing and
tests themselves, Fire Sentry, in compliance with NFPA 72 codes, has developed portable test lamps for
periodical “end-to-end” testing their Detectors remotely. Some of the most important functions of the remote
test lamp are to ensure the Detector’s optical path is not blocked, the Detector is aimed properly at the fire
threat area (th
at the Detector mounting bracket didn’t move or was accidentally bumped by someone), and
the Detectors alarming circuitry and outputs (i.e. relays, 4-to-20 mA, etc.) function properly. Internal Detector
testing and window lens cleanliness testing cannot insure the Detector is aimed properly, that its view of the
fire scene has not been blocked by something such as a newly installed pipe or duct, storage box, parked
vehicle, etc., and its alarm outputs are functioning properly.
For calibrated testing, in compliance with NFPA 72 Codes for flame detectors, as manufacturers of the FSX
product line, our calibrated testing using our FT-2055X Test Lamp is as follows. If the FS24X set at Highest
Sensitivity alarms to a fully charged FT-2055X Test Lamp at a distance between 1 and 25 feet, then the
FS24X is in normal operating condition.
U
TL1055X
U
is a general purpose NEMA 1 hand held
rechargeable Test Lamp designed for testing the
FS24X Detectors externally. The hand held Test
Lamp (see Figure 4-1) comes with a Universal
Charger (110 VAC and 220 VAC).
U
TL2055X
U
is a Class I, Div. 1 approved Explosion-
Proof Test Lamp designed for testing the FS24X
Detectors externally, in a hazardous location. The
hand held Test Lamp (see Figure 4-2) comes with a
Universal Charger (110 VAC and 220 VAC).
Figure 4-1
TL1055X Hand Held Test Lamp (NEMA 1)
Figure 4-2
TL2055X Hand Held Test Lamp (Class
I
, Division 1)
4.5
Field of View Restrictor
There are some unique and specialized applications that may require a restricted field of view in order to
prevent the Detector from alarming to a known (friendly) fire/flame source (such as a flare stack). The Model
FVR-01 Field-of-View Restrictor is easily modified in the field with a simple hack saw to obtain custom
Detector field-of-views for applications where specific narrow field-of-views are required. The Model FVR-01
Detector accessory has been developed specifically for these unique types of applications.