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P/N 1036525-EN • REV F
Wiring
Figure 6: 500N Series two-wire wiring
Caution:
Risk of system failure. The system may not operate if
the detector is not connected to the control unit initiating device
circuit as specified in the detector or control unit literature.
Note:
The 500N Series two-wire detectors are polarity
sensitive.
Note:
CleanMe is enabled by wiring units in reverse polarity.
Figure 7: 500N Series four-wire wiring
Note:
The 500N Series four-wire detectors are not CleanMe compatible.
Figure 8: 500N series four-wire E model wiring
Note:
The 500N Series four-wire detectors are not CleanMe compatible.
Model
521NB/521NBXT
521NCSXT
521NC/521NCXT
CleanMe
Enabled
CleanMe
Disabled
CleanMe
Disabled
Two-wire
initiating
circuit
First
detector
Listed alarm control
Last
detector
EOL
device
NC
COM
NO
Model
521NB/521NBXT
521NCSXT
521NC/521NCXT
Model
521NB/521NBXT
521NCSXT
521NC/521NCXT
+
_
Listed alarm control
Power
Initiating
circuit
First
detector
COM
NO
COM
NO
Last
detector
NC
COM
NO
Model
541NB
541NBXT
Model
541NCSRXT
541NCSRH
541NCRXT
EOL device
ESL
204-12/24V
Power
Supervision
Relay
Listed alarm control
Power
Initiating
circuit
First
detector
COM
NO
COM
NO
Last
detector
NO
COM
NC
Model
541NB
541NBXT
Model
541NCSXTE
541NCXTE
EOL device
