Johnson Controls IFC-1010 Technical Manual page 100

Intelligent
Detectors
2551J/2551THJ
2551j_thj
2251J
2551j
1551J
5551j
5551J/5551JR
2551j
1251J
1251j
100 Hardware Installation—Installing the IFC-1010/2020
These intelligent, addressable detectors provide analog information to the
control panel, which processes this analog information and continually
makes decisions on the alarm, maintenance, or normal status of each
device. Each detector head mounts to a B501 Base, B501BJ Base,
B501BH Base, B524BI Isolator Base, or B524RB Relay Base with
sounder for ease of installation or replacement. Each detector responds to
an address that is set in the detector head via built-in rotary switches. An
integral LED may be programmed to blink when in communication with
the control panel and can be latched on when the unit enters an alarm
condition. A different address is required for each detector of an SLC
(01-99). The panel distinguishes between detectors and modules so a
detector and a module may be set to the same address without conflict.
An intelligent photoelectric smoke detector that provides analog
measurements of the optical smoke level in the chamber to the control
panel. The 2551THJ is an intelligent photoelectric smoke detector with
fixed thermal.
The 2251J is a low-profile intelligent photoelectric smoke detector.
An intelligent ionization smoke detector that measures the level of
combustion products in the chamber using the ionization principle and
provides this measurement to the control panel.
The 5551J (135 degree Fahrenheit fixed temperature) and the 5551JR
(rate-of-rise) intelligent thermal sensors takes the temperature and
provides it to the control panel.
The 1251J is a low-profile intelligent ionization smoke detector.