MAINTENANCE AND OPERATION MANUAL
NOVA-65 SC/0111258-00
Tideland Signal
Page
7 of 32
0111258-00
Rev. B 16-Jun-16
Figure 5 Fail Terminal Diagram
LED Drive Circuit
A high efficiency DC to DC converter provides virtually constant luminous output
under a wide range of input power conditions. The DC to DC converter
compensates for temperature changes of the LED array, conserving power at
low ambient temperatures where LEDs are most efficient but batteries are least
efficient. LED power is reduced below 100%, using SignalView or switch S5
(Section 3.3 LED Power Configuration, below).
1.3.2 Operation Modes
Main/Standby Installations
When redundancy is required, units are paired as Main and Standby units with
an external cable. The MaxiHalo II controller supports up to eight pairs (sixteen
units) in this configuration. During normal operation, Main units (with odd
addresses) send a signal via ASCII sync line that tells Standby units (with even
addresses) that the Main units are operatin
g normally. When a “Main Fail”
signal is received, or when communication is lost, the Standby unit activates.
The Standby unit remains activated until it receives a “Main OK” signal from its
Main light.
