11
As previously stated in the installations sheet, the Intrinsically Safe Sounder
Range
must
be powered via a suitable Zener Barrier or Galvanic Isolator whose
characteristics do not exceed:
Uo:28v, Io: 93mA, Po:660mW
The value for Uo must be between
16v and 28v
, and Io should not be below
50mA.
This range of products is only to be powered via a correctly rated Zener Barrier
or Galvanic Isolator. To power these units up without the correctly rated barrier
could damage these products and so void any protection ratings.
Specific Conditions of Use:
1. Clean equipment regularly to prevent dust build-up with a damp or anti-
static cloth only.
2. Equipment only suitable for fixed installation.
3. It must be ensured that the equipment is installed in accordance with
IEC 60079-14 and IEC 60079-25 and that capacitance and inductance limits
are not exceeded by distributed capacitance (Cc) or distributed inductance
(Ic) due to cable length.
Table of Entity Parameters
Parameter
Barrier Supply
Ui
28V
li
93 mA
Pi
660 mW
Li
0
Ci
0
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