The 711S zone expansion module from DMP is designed for tight spaces. This updated version of the 711 is a fraction of DMP’s original model’s size, making it ideal for small applications, such as installing in a pull station back-box or in a recessed contact hole behind the contact. The 711S is a flying lead style, single-zone, addressable expansion module that allows users to increase the number of reporting zones available on XT30/XT50 and XR150/XR550 panels. The modules connect to the panel four-wire keypad bus or LX-bus and are set to an address that determines the reporting zone number. The 711S provides one Type A Class B zone.