Circuits; Power Requirements; Channels/Inputs; Primary And Secondary Phone Lines - Fire-Lite 411 Manual

Circuits

1.3 Circuits
The 411 circuit board utilizes surface mount technology and contains a MicroController Unit (MCU), dual modular
phone line jacks, piezo sounder and two connectors for input, output and power wiring.

1.3.1 Power Requirements

Voltage for the digital communicator may be a power-limited, filtered, nonresettable nominal 12 VDC [11.2 to
12.4 VDC (UL tested range: -15%, +10%)] or nominal 24 VDC [21.3 to 24.0 VDC (UL tested range: -15%,
+10%)]. Jumper J4 is used to select the power source.

1.3.2 Channels/Inputs

Three input channels are provided on the 411 digital communicator which are used for connection to the control
panel being monitored. Each input can be programmed to monitor the control panel for:
• fire alarm activation
• trouble activation
• fire supervisory activation
• AC loss activation
Each input channel is configured as a Class B circuit and must be wired to a Normally Open contact.

1.3.3 Primary and Secondary Phone Lines

Modular jacks are used to interface the primary and secondary phone lines to the public telephone network.

1.3.4 Earth Ground

Connect a separate earth ground wire to TB1 terminal 3 for transient protection.
Note: If zero ohms impedance exists between the 411 circuitry and earth ground, a ground fault will be indicated
at the host FACP.
1.4

Controls and Indicator

Comm.
Fail LED
Front Panel Switch
• Silence Switch - press to silence local 411 piezo sounder
10

411 Indicator

FIGURE 1-2:
411 Communicator Document #50921 Rev. E 12/09/2008 P/N 50921:E
Piezo
Silence
Switch