there are three maximum dissipation limits that correspond to each of the three maximum optional ambient temperatures: + 40° C, + 55° C and + 60° C.
several IECEx/ATEX certified 'Ex tb' control devices can be mounted on the enclosure faces
a glass or polycarbonate window can be fixed to the lid
various electronic devices can be installed internally such as terminals, analog and digital instruments, control and measurement devices, circuit breakers and IECEx/ATEX certified battery packs.