PTB 99 ATEX 1161. II 2 G EEx ed ia IIC T6. 4-Pole Safety Switch. AC3 switching capacity Lockable Auxiliary contacts 1NO, 1NC IP66 rated Back/mounting plate (stock no. ; 282-0878 282-0878 ) available separately allows installation in channel or pipe-mount (40 to 62mm diameter) locations 2 x M20 cable entries suitable for 5 to 13mm OD cable