Housing design allows mounting of devices in two layers. on the bottom, and the mounting plate. 1st layer: Housing in the standard version has installed in the bottom of the housing 2 DIN rails with a length of 315mm. Additionally, there is the possibility of additional DIN rails mounting. Optionally, instead of DIN rails on the bottom of the housing can be installed mounting plate, with working area of 320 x 180mm. The housing also has an additional mounting plate designed to mount transformers, or power supply units. 2nd layer: Housing is equipped with a hinged mounting plate with working area of 290 x 190mm. Such mounting plate provides easy access to equipment mounted on the bottom, at 1st layer. In casing there is a place for 17Ah/12V battery. Equipped with a tamper (to detect the opening of the housing). There is also the possibility of installing additional tamper on the side of the wall, signalling an attempt to detach casing from fixings. Normally closed housing is bolted by 2 screws from the front. The front face of housing has stamping allowing the lock assembly. In the lower part there is a 8mm spacer to allow comfortable wiring for the equipment installed in the housing. Dimensions: 360 x 515 x 175 mm.