MP SERIES™ Battery Backup System for Traffic Signals: MP2000E System
Volume One: Operating Manual
Page 6-2
6.a.1.2 Green Terminal Block Programming Options
Each of the terminal block’s six individual dry contact closure indicators are a 1 Form-C
isolated unto themselves. The contact closures default Common (C) to Normally Closed (NC)
in the de-energized position.
Each of the six programmable contacts can be programmed for one or more functions such
as:
•
On Batt: This relay energizes when Utility Input line power is unqualified.
•
Low Battery: These relays energize when the battery drops below the programmed
battery capacity. The default value is 47.5VDC or 40% battery capacity.
•
Timer: These relays energize after the unit has been in Battery mode for the
programmed time period. The factory default value is 2 hours.
6.a.1.3
Return to On Line Mode
Once the BBS begins receiving external utility power the BBS module senses its presence and
qualifies the power. The BBS then switches off the inverter and switches on the battery
charger. At this point, all loads attached to the MP2000E AC output terminal will be operated
directly using the external utility power.
6.a.2 MP2000E Manual Bypass Switch Module
The Manual Bypass Switch (MBPS) module is a stand-alone switch used to manually isolate
the MP2000E BBS module from utility power and the intersection controller. It facilitates
maintenance and BBS replacement operations without turning off power to the loads. The
switch is rated at 120VAC and 40 amps.
6.a.3 MP2000E Power Transfer Switch Module
The Power Transfer Switch (PTS) is the third module in the BBS system. The PTS is rated at
120VAC and 40 amps. The PTS requires from the MP2000E a 48VDC PTS signal and 120VAC
output to engage either the MP2000E battery backup or boost / buck VAC power output to the
end equipment. The PTS ensures that a continuous flow of power reaches the traffic controller
cabinet. The PTS defaults to commercial power in the de-energized position.
