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Technical
Section 11
Dimensions
Section 12
8
Switchboard display functions
Micrologic 5E trip units
Functions and
characteristics
Micrologic measurement capabilities come
into full play with the FDM121 switchboard
display. It connects to Compact NSX via
a simple cord and displays Micrologic
information. The result is a true integrated
unit combining a circuit breaker and
a Power Meter. Additional operating
assistance functions can also be displayed.
FDM121 switchboard display
The FDM121 is a switchboard display unit that can be integrated in the Compact
NSX100 to 630 A system. It uses the sensors and processing capacity of the
Micrologic trip unit. It is easy to use and requires no special software or settings. It is
immediately operational when connected to the Compact NSX by a simple cord.
The FDM121 is a large display, but requires very little depth. The anti-glare graphic
screen is backlit for very easy reading even under poor ambient lighting and at sharp
angles.
Display of Micrologic measurements and alarms
The FDM121 is intended to display Micrologic 5 measurements, alarms and
operating information. It cannot be used to modify the protection settings.
Measurements may be easily accessed via a menu.
All user-defined alarms are automatically displayed. The display mode depends on
the priority level selected during alarm set-up:
b
b
High priority: a pop-up window displays the time-stamped description of the alarm
and the orange LED flashes
b
b
Medium priority: the orange “Alarm” LED goes steady on
b
b
Low priority: no display on the screen
All faults resulting in a trip automatically produce a high-priority alarm, without any
special settings required.
In all cases, the alarm history is updated.
If power to the FDM121 fails, all information is stored in the Micrologic non-volatile
memory. The data can be consulted via the communication system when power is
restored.
Status indications and remote control
When the circuit breaker is equipped with the BSCM module, the FDM121 display
can also be used to view circuit breaker status conditions:
b
b
O/F: ON/OFF
b
b
SD: trip indication
b
b
SDE: Fault-trip indication (overload, short-circuit, ground fault)
Main characteristics
b
b
96 x 96 x 30 mm screen requiring 10 mm behind the door (or 20 mm when the
24 volt power supply connector is used)
b
b
White backlighting
b
b
Wide viewing angle: vertical ±60°, horizontal ±30°
b
b
High resolution: excellent reading of graphic symbols
b
b
Alarm LED: flashing orange for alarm pick-up, steady orange after operator reset if
alarm condition persists
b
b
Operating temperature range -10 °C to +55 °C
b
b
CE / UL marking
b
b
24 V DC power supply, with tolerances 24 V -20 % (19.2 V) to 24 V +10 % (26.4 V)
When the FDM121 is connected to the communication network, the 24 V is supplied
by the communication system wiring system
b
b
Consumption 40 mA
Mounting
The FDM121 is easily installed in a switchboard.
b
b
Standard door cut-out 92 x 92 mm
b
b
Attached using clips
To avoid a cut-out in the door, an accessory is available for surface mounting by
drilling only two 22 mm diameter holes.
The FDM121 degree of protection is IP54 in front. IP54 is maintained after
switchboard mounting by using the supplied gasket during installation.
Connection
The FDM121 is equipped with:
b
b
A 24 V DC terminal block:
v
v
Plug-in type with 2 wire inputs per point for easy daisy-chaining
v
v
Power supply range of 24 V -20 % (19.2 V) to 24 V +10 % (26.4 V)
b
b
Two RJ45 jacks
The Micrologic connects to the internal communication terminal block on the
Compact NSX via the pre-wired NSX cord. Connection to one of the RJ45 connectors
on the FDM121 automatically establishes communication between the Micrologic
and the FDM121 and supplies power to the Micrologic measurement functions.
When the second connector is not used, it must be fitted with a line terminator.
FDM121 display.
Surface mount accessory.
Connection with FDM121 display unit.