Central plate, alpine white, security technology, Busch-Infoline, central plate 1-way, with label field With operating button. For signal/stop button insert 1520/1 UK. For monitoring insert 1511 U. For Busch humidity alarm insert 1531 U. Protection class device: IP 20 Dimensions (H x W x D): 55 mm x 55 mm x 12 mm
