44
2.2.13 Low Battery Mode Status
Purpose: Describes the various states of the Low Battery Mode (Figure 27).
Low Battery Warning default set at 23.5 / 47.5VDC, USER PROGRAMMABLE.
Fully Charged 28 / 56VDC
Low Battery Warning
@ 23.5/ 47.5VDC
Low Battery Shutdown
@ 21/ 42.0VDC
Low Battery Shutdown @ 21 / 42VDC in 3 seconds
Low Battery Disconnect @ 20/ 40VDC in 10 seconds
Low Battery Disconnect
@ 20/ 40.0VDC
Output Green
LED
Flashing
Output Green
LED Flashing
Output Green
LED OFF
All LEDs and LCD are OFF
Battery Voltage
Start
* TRTC-0654-N1/N2, TRTC-1124-N1/N2: 24VDC
* TRTC-2005-N1/N2: 48VDC
Time
Figure 27
Low Battery Modes Status
Note:
Not to scale. All values are shown for illustrative purpose
only
and will
charge under different operating
and battery conditions
. Actual times will be different. Perform a run time test (Section 2.4.1) for application
specific operating conditions.
Low Battery Warning
The batteries will continue to power the load, but they are almost discharged and cannot provide power much longer.
TIP:
The operator should shut down unnecessary loads to extend battery backup time.
Low Battery Shutdown
When the battery decreases to (TRTC-0654-N1/N2, TRTC-1124-N1/N2) 21.0VDC / (TRTC-2005-N1/N2) 42.0VDC for 3
seconds, the unit automatically shuts output OFF and goes into STANDBY mode waiting for input power to return. The
batteries are considered fully discharged and can no longer support the load, but they have enough power to keep the
unit’s monitoring and control circuits active. The housekeeping power supply is kept alive.
Low Battery Disconnect
When the battery discharges to (TRTC-0654-N1/N2, TRTC-1124-N1/N2) 20VDC / (TRTC-2005-N1/N2) 40VDC for 10
seconds, the unit automatically goes into this mode. The batteries are disconnected from the unit to protect the batteries
from being damaged by a deep discharge. Both the LED and LCD shut OFF, showing the unit is shut off. The unit stays off
until line power or a backup generator is available or fresh batteries are connected. To prevent battery damage, if the
TRTC is to remain in a low battery disconnect state for an extended period. The TRTC and battery circuit breakers
must be
switched OFF and the manual bypass switch
must be
switched to the Bypass position. For additional
protection disconnect the Anderson style battery connector from the TRTC.
Note: only authorized personnel should perform all parameter changes, as it may affect the performance
of the traffic intersection.