Honeywell NOTIFIER NCA-2 Instruction Manual page 91

A Display and Control Center (DCC) is a display location which can respond to events occurring at other participating locations. While
there may be multiple Display and Control Centers on a network, an individual location can only accept the commands of one DCC at a
time. The user's actions at any participating station, panel, or remote display determine which location will be the DCC.
For Fire Applications: When the NCA-2 is not the Display and Control Center, pressing Signal Silence, System Reset, Acknowledge or
Drill (Alarm Signal for Canadian applications) will automatically send a permission request to the current DCC. The DCC must release
control of the node to the requesting NCA-2 before the key will be processed. If no DCC already exists, the key is processed and the
acknowledging panel or station assumes control. Unless specifically denied authorization, the NCA-2 will assert control over any NCA-
2, NFS-320, NFS2-640, NFS2-3030, NFS-3030 and NCS node that is mapped to it. When it assumes control, the CONTROLS ACTIVE
LED on the keypad will illuminate.
Pressing an ALL CALL, PAGE ACTIVE EVAC AREAS, PAGE ACTIVE ALERT AREAS, PAGE INACTIVE AREAS or ENABLE
TELEPHONE PAGE button on a DVC-KD that has been programmed to participate in DCC with the NCA-2, will cause permission to
be requested
ACS points programmed on an annunciator with a type of 96DCC will also cause permission to be requested.
Partial control is also possible, where one or more of the nodes denies authorization and one or more nodes allows it to assert control.
DCC participation is set on the NCA-2 Settings screen under the NCA-2 Programming menu (see "Panel Settings" on page 68).
Powe
CAUTION: DCC MUST BE ENABLED ON ALL PARTICIPATING SYSTEMS
!
On systems utilizing the DCC function, all locations that can participate must be enabled.
CAUTION: FULL POWER RESTORE REQUIRED BEFORE INITIATING REMOTE COMMANDS
!
When re-booting a NCA-2 that is participating in DCC, wait until system is completely initialized before sending DCC
commands to a remote node.
For Mass Notification Applications: DCC must be turned off for mass notification applications. When the NCA-2 is used as part of an
ACU, LOC or CCS configuration, the DVC must have Mass Notification Control Settings selected and the NCA-2 node number
selected. The CONTROLS ACTIVE LED will remain lit unless control is taken from another node, indicating that Acknowledge, Sys-
tem Reset, Signal Silence and Drill functions are available for the NCA-2. If a mass notification page is initiated from a DVC, the node
associated with that DVC will assume control of the network and its CONTROL ACTIVE LED will remain lit. Control functions for that
node will remain available.
Other nodes on the network: For all other nodes, the CONTROLS ACTIVE LED will turn off and control functions will be blocked for
the duration of the MN page. Once the page is complete, control will be returned to all nodes and their CONTROLS ACTIVE LEDs will
turn back on.
LCD-160: Any LCD-160s connected to the NCA-2 will turn off their CONTROLS ACTIVE LED during an MN page from the DVC. If
the MN page is performed from the DVC-RPU, the NCA-2 will not have control, so the CONTROLS ACTIVE LED will turn off and
control functions will not be available. The LCD-160 that shares the same address as the DVC-RPU will have control and its CON-
TROLS ACTIVE LED will remain lit.
Annunciators (ACM, LCD2-80, etc.): Any annunciators connected will follow the control status of the NCA-2 and will have the same
control functions, if available.
For additional information, refer to the Mass Notification Systems Configuration, Programming and Operations Manual.
NCA-2 Manual — P/N 52482:M5 03/20/2019
Appendix D: Display and Control Center (DCC)
91