
Lucent Technologies Lineage
®
2000 ECS-6U Controller J85501E-1
2 - 6 Product Description
Issue 4 August 1998
Office Alarm
Contacts and
Alarm Battery
Supply
Alarm contacts are provided on the 113A2 that may be
connected to the office alarm system by the installer. (See
Section 4, “Wiring.”) Each set of contacts is a Form C or transfer
type, i.e., a combination of normally open and normally closed
contacts with one side of each in common. The normally open
contact is referred to as O (other applications may call this the
NO contact). The normally closed contact is referred to as C
(other applications may call this the NC contact). The common
or return contact is referred to as R (other applications may call
this the C contact). Each Form C set is isolated. An alarm set is
provided for each alarm condition, as follows:
AC Failure (ACF)
Major Fuse Failure (MJF)
Minor Fuse Failure (MNF)
High Voltage (HV)
Battery on Discharge (BD)
In addition, alarms that are classified as Major or Minor cause a
group of general-purpose Major or Minor alarms, as follows:
Power Major - Visible (PMJV)
Power Major - Audible (PMJA)
Power Major - External (PMJE)
Power Minor - Visible (PMNV)
Power Minor - Audible (PMNA)
Power Minor - External (PMNE)
The de-energized or alarm state of a relay is its normal state, i.e.,
when an alarm condition exists, a closure exists between the “C”
and “R” poles and an open exists between the “O” and “R” poles.
All alarms are in the non-alarm state only when the control unit
is powered and the corresponding alarm is not present. When an
alarm occurs, the corresponding closure occurs. When the
control unit loses power, except for HV, all alarms are issued.
An Alarm Battery Supply (ABS) and a ground return are
available on one of the terminal blocks (TB101). These pins may
be wired by the installer to one or more alarms on the terminal
blocks to drive alarm lamps, buzzers, or remote relays in the
office alarm system. The ABS is the same voltage as the plant
bus voltage and is separately fused on the FAB.