!
12V unit
Ui
15.7V
Ii
150mA
Ci
Negligible
Li
20mH
Li/Ri
61.5uH/
!
Note – The DB51 sounder has internal resistance that limits the input current to a nominal 37mA when
connected to a 15.7V source. With an Ii of 150mA and In=37mA, this allows four (4) DB51 sounders to
be connected in Parallel.
An optional end-of-line resistor may be connected across the input terminals.
5.0 MAINTENANCE
During the operation of the sounder, ensure it is checked at regular intervals to ensure that no debris has
collected in the cover apertures or that the sounder has not been damaged.
The product must not be subjected to mechanical and thermal stresses in excess of those permitted in the
certification documentation and this manual.
During the working life of the sounder, it should require little or no maintenance. However, if abnormal or
unusual environmental conditions occur due to plant damage or accident etc., then visual inspection is
recommended.
The product cannot be repaired by the user and must be replaced by an identical unit.
01/17
© MEDC 2017
Summary of Contents for DB5M
Page 2: ...01 17 MEDC 2017...
