Intelligent Detectors (System Sensor)
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Unimode 400 Installation PN 50710:A 10/22/97 1-11
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Intelligent, addressable detectors provide analog information to the control panel. This
allows the control panel to continually process this information to determine the status
of each detector (alarm, trouble, maintenance, or normal). Each detector responds to an
address that is set in the detector head using built-in rotary decimal switches. You can
program the sensitivity of each intelligent detector. (Refer to Appendix C in the
Unimode 400 Programming Manual for details.)
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Table 1-8 contains a list of the intelligent detectors that you can use with a
Unimode 400 system:
Table 1-8 Intelligent Detectors
Option Description
B501B
B210LP
B501BH
B524RB
B524BI
Standard U.S detector base
Low Profile base
Sounder base
Relay base
Isolator base
2551/2551TH/2251 An Intelligent Photoelectric Smoke Detector provides analog
measurements of the optical smoke level in its chamber to the
control panel. Also available: an 2551TH with a 135°
thermostat and a 2251 low profile photoelectric detector.
1551/1251 An Intelligent Ionization Smoke Detector measures the level
of combustion products in its chamber using the ionization
principle and reports this measurement to the control panel.
Also available: a 1251 Low Profile detector.
When used in duct applications, the 1551 must be set to high
sensitivity (AL=1). Refer to Appendix C in the Unimode 400
Programming Manual for details on setting alarm sensitivity.
5551 An Intelligent Thermal Sensor (135°F fixed temperature).
Also available as an 5551R which is a combination 135°F
fixed and 15°F per minute rate of rise.
RA400Z A Remote Single LED Annunciator that can be wired directly
off of an addressable detector for annunciation of that
detector's alarm status.
DH500/DH502 Duct Housings for the 2551 and 1551.
3251 A microprocessor-based intelligent smoke detector that uses a
combination of photoelectric, ionization, and thermal sensing
technologies.
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