Intrinsic safety barriers for plants in areas at risk of explosion certificate:construction intrinsically safe approvalDMT 01 ATEX E 042 X -II (1) G [Ex ia] IIC, II (1) D [EX iaD], I (M2) [Ex ia] I, II 3G Ex nA IIC T4 [Zone 0] [Ex ia] IIC, [Ex ia ] I, [Ex iaD]supply 10 to 30 Vdc