
Lucent Technologies Lineage
®
2000 ECS-6U Controller J85501E-1
Issue 4 August 1998
Product Description 2 - 5
Basic
Controller
The basic ECS-6U controller monitors and controls any
combination of up to six Lucent Technologies switchmode or
Lineage
®
2000 ferroresonant rectifiers and provides a single
interface point for power alarm and status reporting. Equipped
with a 113A2 Control Unit, a RIB, and a Fuse Alarm Board, the
basic controller performs traditional analog control functions.
Each of these functions is described in detail in the paragraphs
that follow.
Operating
Voltage
The controller is powered by the plant dc voltage and may be
used in 24V or 48V plants. It may be powered from either
positive ground systems, e.g., -48V, or negative ground systems,
e.g., +24V. Movable jumpers located on the upper tray
backplane and DIP switches located on the 113A2 and the
Rectifier Interface Board (RIB) must be positioned according to
the plant voltage. The 113A2 may be plugged directly into the
ECS-6U controller when the backplane is properly configured.
Batteryless
Operation
The ECS-6U controller is suitable for telecommunications
power plants with or without batteries. In batteryless plants, the
loss of ac power causes an immediate loss of dc power to the
controller. When ac power is restored, the ECS-6U controller, in
an unpowered state, allows the rectifiers to automatically restart.
IMPORTANT
When the controller loses power, it also loses the ability to
detect alarm conditions in the plant. To prevent the danger
of unreported alarms, Power Major and Power Minor
alarms are automatically issued when the controller is
powered down.
IMPORTANT
Not all rectifiers will perform properly without a battery.
Consult your rectifier manual.
Rectifier Sense
Leads
Separately fused sense leads run from the fuse alarm board to the
rectifiers via the controller backplane. These leads are not
interrupted when the 113A2 is removed. The rectifiers use the
sense leads to maintain the plant bus voltage independently of
any load-dependent voltage drop between their output terminals
and the bus.