Member Home ACCESS CONTROL CELL & NETWORK COMMUNICATORS MONITORING CENTER CONTROL PANELS FIRE DEVICES INTRUSION DEVICES KEYPADS LITERATURE / PROMO MODULES & EXPANDERS Auxiliary Modules Expansion Modules Accessories PACKAGES AND KITS POWER SUPPLIES & TRANSFORMERS VIDEO PRODUCTS WIRELESS PRODUCTS Z-WAVE DEVICES INTERNATIONAL SEARCH  Go buy.dmp.com Log-in... log-in ID: password:	Model: 277 277 Trouble Annunciator The Model 277 Trouble Sounder is an audible trouble alert that may be installed in place of the Model 893A Module for XR150/XR350/XR550 Series control panels. For use with: XR150/XR350/XR550 Series Control Panels Please log-in to purchase.    Current Product Documentation is available at DMP.com/resources