Siemens SIMOTICS XP 1MB1 series - Zone 21 with Type of Protection Ex Tb IIIC Db (Equipment Dust Explosion Protection Provided by the Enclosure T)

Description
3.3 Installation
1LA5/6/7/9, 1LG4/6, 1MA6/7, 1MB..1/2/3/4/5 - SH 63 ... 355
Operating Instructions, 06/2018, A5E44455710A
31
3.3.9.3
Zone 21 with type of protection Ex tb IIIC Db (equipment dust explosion protection
provided by the enclosure "t")
0158
II
2
D
Ex
tb
IIIC
T125°C
Db
①
②
③
④
⑤
⑥
⑦
⑧
⑨
⑩
⑪
Ex
tb
IIIC
T125°C
Db
X
① ② ③ ⑦ ⑧ ⑨ ⑩ ⑪ ⑫
①
CE
- or EAC marking
②
Identification number or name of nominated testing agency
③
Code for prevention of explosions
④
Device group: II not for m
ines susceptible to firedamp, but other hazardous zones
⑤
Device category: 2 for occasional danger
⑥
Atmosphere: D for dust
⑦
Explosion protection: International
⑧
Type of protection: "tb" for protection by enclosure
⑨
Explosion group: IIIC for conduc
tive dust
⑩
Maximum surface temperature: T 125°C
⑪
Device protection level: Db for a high level of protection in flammable dusty atmo
s-
pheres
⑫
"X" special conditions