Fire-Lite LDM-32F Lamp Drivers - Manual (Page 9)

LDM-32F PN 50055:C 03/20/01
9
1. Introduction
General
The LDM Series Lamp Driver Modules, which consist of the LDM-32F master
and LDM-E32F expander modules, are used to provide an interface to a custom
graphic annunciator. The master module provides power and control for a
maximum of three expander modules. Both these modules have output
connectors which are used to drive lamps or LEDs and input connectors which
are used for remote switch functions.
The Lamp Driver Modules may be connected to an MS-9200, MS-9600 or
Sensiscan 2000 fire alarm control panel (FACP) to provide remote
annunciation of the following:
• General system status:
• Alarm and trouble status of zones or individual points
• Alarm only status of zones or individual points
The modules also interface to remote control switches which may be used to
provide:
• System reset
• System silence
• System acknowledge
• Temporary activation of NAC outputs
• Alarm relay activation
• Other control functions
The modules interface to the host fire alarm control panel via an EIA-485
communications bus circuit. A maximum of 32 LDM-32Fs may be connected
to the power-limited EIA-485 bus, but if other types of devices are also
connected to the EIA-485 bus, the maximum number of LDM-32Fs must be
reduced by the total of such devices. The EIA-485 wiring distance must not
exceed 6000 feet and cannot be T-tapped. Multiple LDM-32Fs may be used
to annunciate duplicate information.
Power to the LDM-32Fs is typically provided by the host FACP and must be
power-limited, regulated 24 VDC. An external UL listed battery backed power
supply may also be used.
Note: Careful consideration must be given to system battery calculations when power for
the LDM modules and lamps or LEDs is provided by the host FACP. Refer to the
specifications in the appropriate FACP technical manual when making these calculations.
General alarm Municipal tie status
General trouble System silence
General supervisory Alarm relay status
NAC output status