User's Manual

SPDS wireless adaptor- User Manual Page 8

7. ATEX Marking

II – Equipment Group II: Surface (no-mining) equipment.

2 - Equipment Category 1: Very high degree of protection for use in Zone 0.

G – Atmosphere Group: Gases, Vapors, Mists

Ex- Explosion proof equipment: The Equipment that has been certified

for use in a Potentially Explosive Atmosphere

ia - A protection technique based upon the restriction of electrical energy

within the apparatus and in the interconnecting wiring, exposed to a

explosive atmosphere, to a level below that which can cause ignition by

either sparking or heating effects. “ia” - Indicates that the electric circuit is

not able to cause an ignition when there are two failures (“ib” is for a single

failure situation).

IIB - Gas group B: Ethylene - typical gas in petrochemical environment.

T4- Temperature classification (max.135ºC)

Ex ia IIB T4

0539

II 1 G