Zone 21 With Type Of Protection Ex Tb Iiic Db (Equipment Dust Explosion Protection Provided By The Enclosure "T") - Siemens SIMOTICS XP 1MB1 series Operating Instructions Manual

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