17
©
Dinel DLS–27
12. S
afety
,
ProtectionS
,
comPatibility
and
exPloSion
Proof
Level sensor DLS–27 is equipped with protection against electric shock on electrode, reverse polar-
ity, output current overload, short circuit and short time over voltages.
Electromagnetic compatibility is provided by conformity with standards EN 55022 / B, EN 61326-1,
EN 61000-4-2, -3 ,-4, -5 and -6.
Explosion proof (DLS–27Xi, XiM and Xd) is provided by conformity with standards EN 60079-0,
EN 60079-11, EN 60079-26 and is examined by FTZÚ – AO210 Ostrava – Radvanice, certificate No.
FTZÚ 02 ATEX 0234X.
Explosion proof (DLS–27Xd) is provided by conformity with standards EN 60079-0, EN 60079-31 and
is examined by FTZÚ – AO210 Ostrava – Radvanice, certificate No. FTZÚ 10 ATEX 0092X.
Supplied electrical equipment matches the requirements of valid European directives for safety and
electromagnetic compatibility. The declaration of Conformity for the above mentioned product was
issued.
Special conditions for safe use of variants DLS-27Xi (Xit, XiM, XiMt)
If the apparatus is used as device of Group II and with using of an approved power supply device,
which output parameters comply with required input parameters, it is necessary to have an galvanic
separation or in case of apparatus without galvanic separation (Zener barriers) it is necessary to
provide equipotential equalizing between sensor and barrier earthing point.
If the apparatus is used in coal mine as device of Group I and with using of an approved power
supply device, which output parameters comply with required input parameters it is necessary to
have an galvanic separation.
When used in zone 0 the present explosive atmosphere of air mixture and gases, vapours of mists
must be comply with: 20°C ≤ T
amb
≤ 60°C, 0.8 bar ≤ p ≤ 1.1 bar.
Design DLS–27Xi can be used in zone 0 or zone 20. With design DLS–27XiT can be used in zone
0 and zone 20 only electrode part head with electronics can be used only in zone 1 or zone 21.
Ambient temperature: T
amb
= -20°C to +75°C
Temperature of measured medium according to design variant see chapter “Specification”.
For design DLS–27XiMT it is necessary to observe that temperature of any surface of apparatus,
when coal dust can from a layer, do not exceed 150°C.
Special conditions for safe use of variant DLS-27Xd
Ambient temperature: T
amb
= -20°C to +70°C
The sensor DLS-27Xd is designed with permanent cable. The cable must be terminated in connection
box with degree of protection IP 6X.
The end of the sensor must be protected against direct daylight.
Maximum effective value of AC or DC voltage that can be applied to the terminals of device, which
are not intrinsically safe, without breaking the type of protection is U
m
= 253 V.
Summary of Contents for Dinel DLS-27 Series
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