Berthold LB 4700 - Page 120

Safety Manual / Explosion Protection Manual 6 Safety Instructions
56926BA26, Rev. 06, 04/2019
11
Zones: Intrinsic Safety
Variants
CrystalSENS:
LB 4700-1x-Ix
UniSENS:LB 4700-2x-Ix
SuperSENS:
LB 4700-3X-Ix
Signal Circuits
intrinsically safe
Explosion Protection Concept of the Compartments
All Compartments
Ex "t" (dust protection)
Electronics Compartment
(Housing)
Ex "d" (flameproof enclosure)
Terminal Compartment
Ex "i" (intrinsic safety)
Ambient Temperature
T
a
min. -40 °C
Temperature class
1)
(T
a
max.) / max. surface
temperature
T1-T5 (T
a
<= +80 °C) / 85 °C
T1-T6 (T
a
≤ +65 °C) / 80 °C
T6 (T
a
<= +75 °C) / 80 °C
II 2 G (Zone 1)
Ex db [ib] IIC T1-T6 Gb
II 2 D (Zone 21)
Ex tb [ib] IIIC T85 °C Db
NEC
Temperature class
1)
(T
a
max.) /
max. surface temperature
T1-T6 (T
a
≤ +75 °C) / 80 °C T1-T6 (T
a
≤ +65 °C) / 80 °C
Class I, Zone 1
AEx db ib IIC T1-T6 Gb
Zone 21
AEx tb ib IIIC T85 °C Db
CEC
Temperature class
1)
(T
a
max.) /
max. surface temperature
T1-T6 (T
a
≤ +75 °C) / 80 °C T1-T6 (T
a
≤ +65 °C) / 80 °C
Class I, Zone 1
Ex db ib IIC T1-T6 Gb
Zone 21
Ex tb ib IIIC T85 °C Db
Protection Principle
Ex "d"/"i"/"t"
1) Temperature Class: Equipment Temperature Class and Installation Temperature Class