LTC 8540/00 Series Instruction Manual Installation
4.5Alarm Input Connections
Connect any 2 conductor wire (shielded cable not usually required) between the alarming device (contact closure or logic level, 0 to 5 VDC) and the appropriate LTC 8540/00 input. The alarm input numbers are marked on the rear panel. Note that two alarm inputs share a common ground connection. The alarm inputs can be configured in groups of 32 to accept either normally open (Factory default) or normally closed type contacts. Refer to the operational settings information above if changes from the Factory default settings are necessary. The total wire ‘loop resistance’ should not exceed 1000 ohms. The unit’s input #1 corresponds to camera #1 in the Factory default setting, but this relationship can be changed during programming with the optional Allegiant Master Control Software package.
4.6Alarm Output Connections
The LTC 8540/00 unit provides eight alarm relay outputs. An alarm output is typically used to activate the alarm input of a security type VCR or other alerting device. A VCR is normally programmed to change recording speeds from a slower time lapse mode to a faster real time mode upon alarm activation.
Operation of the eight relay outputs of the
LTC 8540/00 depends upon how the Allegiant system has been configured to respond to alarm events. The alarm output relays activate accordingly under the following conditions:
1.Relay 1 will activate if the base Allegiant system is set to use the Basic alarm response mode and an alarm occurs on any system monitor. Relay 1 will deactivate after all alarms have been removed from the inputs. Relay 1 will also deactivate if the Allegiant system is disarmed (either the monitor being disarmed or the alarm(s) being disarmed) by an operator from the keyboard. Pressing the Acknowledge key on the system keyboard will not deactivate Relay 1 since the alarm video follows the contact applied to the unit in this alarm response mode. Relays 2 through 8 are not used in this mode.
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2.Relay 1 will activate if the base Allegiant system is set to use the Sequence & Display alarm response mode and an alarm occurs on any system monitor. Relay 1 will deactivate after all alarm videos have been acknowledged (pressing the keyboard Acknowledge key) by the system operator(s) from all system monitors. Relay 1 will also deactivate if the Allegiant system is disarmed (either the monitor being disarmed or the alarm(s) being disarmed) by an operator from the keyboard. Removal of the alarm input will not deactivate Relay 1 since the alarm video(s) are not dependent upon the duration of the contact applied to the unit in this alarm response mode. Relays 2 through 8 are not used in this mode.
3.If the base Allegiant system is set to use the Autobuild alarm response mode and an alarm occurs on system monitors 1 through 8, the relay corresponding to the monitor number will activate for the duration that the corresponding alarm input is applied to the unit. The relay will deactivate if the monitor associated with the relay or if the alarm(s) being displayed on the monitor is disarmed by an operator from the keyboard. Pressing the Acknowledge key on the system keyboard will not deactivate the relays since the alarm video follows the contact applied to the unit in this alarm response mode.
4.If the VersAlarm™ Group Table screen in the PC based Master Control Software package contains an alarm group where Monitors 1 through 8 are included and the ‘Monitor’ option has been selected in the ‘Relay Action’ column, the relay corresponding to the monitor number will activate for the duration that the alarm video remains on the monitor. The relay will deactivate if the monitor associated with the relay or if the alarm(s) being displayed on the monitor is disarmed by an operator from the keyboard. Pressing the Acknowledge key on the system keyboard will not deactivate the relay unless this feature has been selected for the associated alarm group. If the ‘Monitor’ option has been set to ‘1’ in the Group Table, only Relay 1 will activate when monitors in that alarm group become alarmed.
Bosch Security Systems December 13, 2007
