User Guide
At an ambient temperature between –20 and +60°C when
powered from a barrier, isolator or voltage source with a
Uo of less than 1.2W. When powered from a certied
device having a Uo between 1.2 and 1.3W, the maximum
permitted ambient temperature is reduced to +40°C.
This allows BA390X and BA390XS lamps to be installed in
both Divisions and to be used with most common industrial
gases.
6.2 Nonincendive approval
FM nonincendive approval permits installation without
Zener barriers or galvanic isolators in:
Class I Flammable gases, vapours or
liquids
Division 2 Where ignitable concentrations
of ammable gases, vapours or
liquids are not likely to exist
under normal operating conditions.
Use with gases in groups:
Group A Acetylene
Group B Hydrogen
Group C Ethylene
Group D Propane
Having a temperature classication of:
T1 450°C
T2 300°C
T3 200°C
T4 135°C
At an ambient temperature between –20 and +60°C
6. FM Approval
BA390X and BA390XS lamps have FM intrinsic safety
and nonincendive approval allowing them to be installed
in most gas hazardous areas in the USA. The FM and
ATEX intrinsic safety parameters are identical so any of
the circuits shown in this application guide may also be
used for FM installations.
Detailed IS and nonincendive installation requirements
are dened by FM Control Drawing CI390-12 which is
appended to the FM Certicate of Compliance which may
be downloaded from the BEKA website www.beka.co.uk.
6.1 Intrinsic safety
FM intrinsic safety approval permits installation in:
Class I Flammable gases, vapours or
liquids
Division 1 Where ignitable concentrations
of ammable gases, vapours or
liquids can exist all of the time
or some of the time under normal
operating conditions.
Division 2 Where ignitable concentrations
of ammable gases, vapours or
liquids are not likely to exist
under normal operating
conditions.
Use with gases in groups:
Group A Acetylene
Group B Hydrogen
Group C Ethylene
Group D Propane
Having a temperature classication of:
T1 450°C
T2 300°C
T3 200°C
T4 135°C
7