ES-817 Rev. D
Copyright 2020. This document and all information herein are the property of Dresser LLC
Page 8 of 14
Intrinsically Safe (Explosive Dust) – Options Module Installed
Temperature Classification
IEC
Ex ia IIIC T
200
91°C Da
T4 Ta= -55°C to 85°C
ATEX
II 1D Ex ia IIIC T
200
91°C Da
T5 Ta= -55°C to 65°C
US/NEC
Class II Division 1, Groups E, F, G T6...T4
Class III
Zone 20, AEx ia IIIC T
200
91°C Da
T6 Ta= -55°C to 50°C
Can/CEC
Class II Division 1 Groups E, F, G T6…T4
Class III
Zone 20, Ex ia IIIC T
200
91°C
Da
Increased Safety/Non-Incendive Marking for Explosive Gas/Dust
Temperature Classification
IEC
Ex ec ic IIC T6…T4 Gc
T4 Ta= -55°C to 85°C
ATEX
II 3G Ex ec ic IIC T6…T4 Gc
T5 Ta= -55°C to 75°C
US/NEC
Class I Division 2 Groups A, B, C, D T6...T4
Class I, Zone 2, AEx ec ic IIC T6...T4 Gc
T6 Ta= -55°C to 60°C
Can/CEC
Class I Division 2 Groups A, B, C,D T6…T4
Class I, Zone 2, Ex ec ic IIC T6...T4 Gc
US/NEC
Class II Division 2 Groups F, G T6…T4
Class III
Zone 22 IIIB T
200
91°C
Can/CEC
Class II Division 2 Groups F, G T6…T4
Class III
Zone 22 IIIB T
200
91°C
