Edwards EST 3-CPU3 Central Processor Unit Module FIRE ALARM

The 3-CPU3 Central Processor Module is the control element for allrail modules and control/display modules installed in a control panel.The 3-CPU3 module performs the following functions: • Processes all information from modules installed within the cabinetas well as data received from other panels over the network datacircuit• Identifies and supervises all modules installed on the rail chassisand uses an integral watchdog to identify both hardware andsoftware faults• Supervises all traffic on the rail bus and implements ground faultdetection• Date-time stamps events and initiates timed events using aninternal clock with leap year function• Communicates with other 3-CPUx and 3-ANNCPUx modules overa Class A or Class B network data circuit (requires an optionalNetwork Communications card)• Distributes audio messages across a Class A or Class B networkaudio circuit (requires an optional Network Communications card)In addition, the 3-CPU3 module:• Provides connections for two optically isolated RS-232 serial ports(requires an optional 3-RS232 card)• Provides command and control functions for the eight-channeldigital audio subsystem installed on the rail• Provides an optically isolated RS-232 port for data uploads,downloads, and system maintenance• Provides a Form C common alarm, common trouble, and commonsupervisory relay All field wiring connections to the 3-CPU3 module are made usingplug-in connectors.The 3-CPU3 module occupies the two leftmost positions on the railchassis assembly (logical address 0). The 3-CPU3 ships withoutplastic doors and mounting brackets. Before you can install a 3-CPU3you must attach the mounting brackets supplied with an LCD maindisplay module or a 3-CPUDR, both ordered separately