10 | Appendix: Technical data
D-LX 201/721
95
The flame monitor is constructed with potential separation between the supply voltage
(24 V
) and the device's internal voltage. The analogue output is galvanically isolated
with the device's internal voltage.
10.3 Devices for zone 1/21 (housing M4 and S2)
Types
D-LX bbb ccc-dd/
M4
/ffff/ggg
D-LX bbb ccc-dd/
S2
/ffff/ggg
Dimensions
Ø120 mm,
length 310 mm (incl.
purge air connection)
Ø120 mm,
length 230 mm (no
purge air connection)
Weight (without cable)
M4
S2
approx. 2.8 kg
approx. 7.0 kg
Ambient temperature Device-dependent, see section 3.7.1 ATEX
Markings [}22] and section 3.7.2 Labelling as
per NEC 500 [}22]
ATEX labelling See section 3.7.1 ATEX Markings [}22]
Labelling as per NEC 500 See section 3.7.2 Labelling as per NEC 500
[}22]
Humidity ≤ 95 % relative humidity, non-condensing
Mode Intermittent operation, continuous operation
Flame Failure Detection Time
(FFDT)
1 sec (2 sec, 3 sec and 5 sec on request)
(5 sec
not available for types D-LX *** ***-H*,
D-LX *** ***-I* und D-LX *** ***-J*)
Electrical connection Cable 12 x 0.5 mm² (AWG 20) with complete
screening; for cable lengths see section 5.2.1
Connecting cable [}33]
Housing
M4
S2
Die-cast aluminium, painted blue
Stainless steel, unpainted
Protection rating (as per EN 60529) IP 66
Operating voltage 24 V ±20 %
Power consumption approx. 5 W
Protection F1= 0.5 A delayed action, MST 250
F2= 0.5 A delayed action, MST 250
Analogue output 0/4 ... 20 mA Load max. 750 Ω
Flame contact Normally open contact; active when flame ON
Ready for operation contact Normally open contact; active when no fault
(series connection with flame contact as a third
switch-off path possible)
Switching capacity of the relay con-
tacts
min: 10 mA 10 V
max: 0.5 A 24 V
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