Installation Guide and Operating Manual
Honeywell 22
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 Honeywell Analytics Detectors also perform “through the lens” self-
testing and tests themselves, Honeywell Analytics, 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 (that 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 TL-2055 Test Lamp is as follows. If the FS24X set at Highest
Sensitivity alarms to a fully charged TL-2055 Test Lamp at a distance between 1 and 25 feet, then the FS24X
is in normal operating condition.
WARNING: Use test lamp model TL-1055 in non-hazardous locations only! For hazardous
locations, use model TL-2055, as described below.
UTL-1055U 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).
UTL-2055U 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
TL-1055 Hand Held Test Lamp (NEMA 1)
Figure 4-2
TL-2055 Hand Held Test Lamp (Class
I, Division 1)
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