System Sensor KBS and KMS Models - Manual (Page 3)

AUDIBILITY RATING (dBA at 10 ft)
UL Spherical Sound Measurement
Sound level measurements are made in accordance with UL Standard 464. The sound power output is measured in a
reverberant room. Bell shall be capable of providing a sound output equivalent to not less than 75 dBA.
Indoor Measurement
Sound level in the indoor installation may vary depending upon the placement, spacing, and type of walls, etc.
SPECIFICATIONS
KMS Series:
Operating Voltage:
24 VDC Nominal
21 VDC Minimum
30 VDC Maximum
Current: 110 ma
KBS Series:
Operating Voltage:
120 VAC
Current: 45 ma
Reverberant Free Field
Sound Output Sound Output
per UL 464 Measured at 10'
(dBA) (dBA)
24 VDC KMS
KMS-6-24
(6 ″ , 24 VDC, P) 84 97
KMS-8-24 (8 ″ , 24 VDC, P) 87 102
KMS-10-24 (10 ″ , 24 VDC, P) 87 104
120 VAC KBS
KBS-6-120
(6 ″ , 120 VAC, P) 81 95
KBS-8-120 (8 ″ , 120 VAC, P) 84 98
KBS-10-120 (10 ″ , 120 VAC, P) 84 102
P = Polarized
OPERATIONAL TESTING
Always notify a central station monitoring the system before repairing, maintaining, or testing alarm devices.
Upon completion of initial installation, all bells shall be tested per NFPA 72G. Periodic testing should be performed at
least annually. Test more often if required by the authority having jurisdiction. Under normal conditions, System Sensor
bells should provide years of trouble-free service; however, after extended service, parts of the bell may become worn.
In this case, bell should be replaced.
Do not repair or replace any bell components in the field. If bell does not perform properly, replace the entire
unit. Failure to follow this instruction may result in failure of the bell to report an alarm condition.
D770-06-00 3 I56-373-03