MP SERIES™ Battery Backup System
for Traffic Signals: MP2000E System
Volume One: Operating Manual
Page 6-48
MAINTENANCE MENU
34
Line Qualify
Time
When the input power returns and it is qualified, i.e. it is within
acceptable range, the transfer from BATTERY mode to LINE mode is
delayed. This delay is a user-programmed 3, 10, or 30 second period
intended to allow the returned utility power to become stable. The factory
set default value is 30 seconds.
35
Battery
Voltage Level
The threshold for the LOW BATTERY ALARM is set here. The
VOLTAGE level is user-programmable in 0.5VDC increments from
42VDC to 55VDC. The factory default setting is 47.5VDC or 40%.
The relationship between remaining % capacity of battery and its DC
Voltage varies according to the characteristics of the batteries used.
36
Load Shed
Timer On/Off
The programmable timer contacts are manually activated/deactivated ON
DEMAND using this option. Certain loads/signals connected to this timer
can be shed or dropped earlier to extend the backup time.
Note: This function is available only in BATTERY mode.
37
Reset The
Event/Timer
Counters
Resets EVENT to 0; Resets TIMER to 0
Note: This function is available only in LINE mode.
38
Battery
Charging
Temperature
Compensation
The MP2000E incorporates a temperature-compensated smart charger.
The rate of charging is adjusted here based on the battery case
temperature. The factory default value is set at -3mv/°C. It can be
configured to -2.5 with -3, -4, & -5mV/ºC.
39
Ext. Fan
On/Off By
Temperature
Users can set the temperature above which the 48VDC power will be
provided for the external cooling fan. The temperature can be set in 1°
increment from 20° to 55°C. The factory default temperature is set at
+25°C.
Figure 6-31: Maintenance Submenu (continued)
6.c.4.2.1 Password Reset Procedure
