Zone 22 - Siemens SIMOTICS SD Operating Instructions Manual

Operation
8.5 Class
8.5.7

Zone 22

① ②
① ⑪
①
②
③
④
⑤
⑥
⑦
⑧
⑨
⑩
⑪
⑫
86
II 3
③ ④
Ex
② ⑥
CE - or EAC marking
Code for prevention of explosions
Device group: II not for mining, but other hazardous zones
Device category: 3 for infrequent, short-term danger
Atmosphere: D for dust
Explosion protection: International
Type of protection: "tc" for protection by enclosure
Explosion group: IIIB for non-conductive dust
Maximum surface temperature: T 125° C
Device protection level: Dc for an extended protection level in flammable dust
atmospheres
Identification number or name of nominated testing agency
"X" special conditions
D Ex
⑤ ⑥
tc IIIB
⑦ ⑧
Operating Instructions, 05/2014, 5 610 00000 02 000
tc IIIB T125°C
⑦ ⑧
T125°C Dc
⑨ ⑩
Dc
⑨ ⑩
X
⑫
Low-voltage motors