LD 800HSE EX module for DIN rail mounting with 4 H1 links and one HSE connector. Certified for hazardous area Zone 2 acc. to ATEX and IECEx. (Observe Release Notes). The module itself needs external 24 VDC power supply. H1 links must be powered separately. Restrictions: Linking Device 3BSE073314R1 is not suitable for replacing a device with article no 3BDH000320R0101 in a redundant set of devices. For this purpose a limited number of spare devices 3BDH000320R0101 are available as spare parts in BOL.