Logic modules are used to monitor a number of different points in a hazard zone and report when a pre-selected number of these points are in an alarm condition. Other available logic modules can be used when dry relay contacts are required to perform various logic functions. The dry contacts may be used to communicate with and or drive external equipment such as annunciators, SCADA data acquisition systems, or host computers. The contacts can also be used to perform various logic functions within the NOVA-5000 Detection and Control System.
5100 Multi-Input Voting Logic Modules are used to monitor the status of a group of different input points in a hazard zone, and report when a selectable number of these points is in an alarm condition. This function is used primarily to require that more than one sensor or detector is in alarm condition prior to release of extinguishing agent into the hazard.
5110 Relay Logic Modules are used when voltage free dry relay contacts are required to perform an unusual logic function within the NOVA-5000 Control System. This module can also be used to report fire and gas system status to external equipment such as PLC’s, SCADA, computers or data logging systems.
5120 System Facilities Logic Module is used to provide control capabilities common to all modules in a NOVA-5000 System. Pushbuttons on the module enable an alarm on any module to be acknowledged by an operator, alarm devices to be silenced, and all alarms reset. The control system can function without this module, if these capabilities are not required.
