FDM121 Display
MicroLogic trip unit measurement capabilities come into full play with the FDM121 display. It connects to the COM option (BCM ULP) with a circuit breaker ULP cord and displays the MicroLogic trip unit information. The result is a true integrated unit combining a circuit breaker and a power meter. Additional operating assistance functions can also be displayed.
An FDM121 display unit can be connected to ULP communication devices using a prefabricated cord to display all measurements, alarms, histories and event tables, maintenance indicators, and management of installed devices on a screen.
The FMD121 display unit requires a 24 Vdc power supply.
The FDM121 is a display that can be integrated with the PowerPacT H/J/L/P/R or MasterPacT NT circuit breaker systems. 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 circuit breaker by a ULP cord.
It also provides monitoring and control with the use of the I/O application module, the motor mechanism module, or the circuit breaker communication module (BCM ULP).
The FDM121 has 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.
FDM121 Display of MicroLogic Trip Unit Measurements and Alarms
The FDM121 is intended to display MicroLogic trip unit measurements, alarms and operating information. It cannot be used to modify the protection settings.
Measurements can be easily accessed using a menu. All user-defined alarms are automatically displayed. The display mode depends on the priority level selected during alarm set-up:
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high priority: a pop-up window displays the time-stamped description of the alarm and the orange Alarm LED flashes;
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medium priority: the orange Alarm LED goes continuously on;
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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. The MicroLogic trip unit saves the information in its non-volatile memory in the event of an FDM121 power loss.
FDM121 Status Indications and Remote Control
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FDM121 Display |
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Surface Mount Accessory |
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Connection with FDM121 Display Unit |
When the circuit breaker is equipped with the Breaker Communications Module (BCM ULP), the FDM121 display can also be used to view circuit breaker status conditions:
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O/F: ON/OFF
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SD: trip indication
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SDE: fault-trip indication (overload, short-circuit, or ground fault).
When the circuit breaker system is equipped with the I/O application module, the FDM121 can monitor and control:
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cradle management
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circuit breaker operation
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light and load control
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custom applications.
When the circuit breaker is equipped with the COM option (BCM ULP) (including connection to shunt close [XF] and shunt trip [MX1] communication voltage releases), the FDM121 display can also be used to control (open/close) the circuit breaker.
Two operating mode are available:
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local mode: open/close commands are enabled from the FDM121 while disabled from the communication network;
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remote mode: open/close commands are disabled from the FDM121 while enabled from the communication network.
FDM121 Mounting
The FDM121 mounting:
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Has a standard door cut-out of 3.6 x 3.6 in. (92 x 92 mm).
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Is attached using clips.
To avoid a cut-out in the door, an accessory is available for surface mounting by drilling only two 0.87 in. (22 mm) diameter holes.
FDM121 Connection
The FDM121 is equipped with a 24 Vdc terminal block:
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A plug-in type terminal block with two wire inputs per point for easy daisy-chaining.
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A power supply range of 24 Vdc -20% (19.2 V) to 24 Vdc +10% (26.4 V).
A 24 Vdc auxiliary power supply must be connected to a single point on the ULP system. The FDM121 display has a two-point screw connector on the rear panel of the module for this purpose. The ULP module to which the auxiliary power supply is connected distributes the supply via the ULP cable to all the ULP modules connected to the system and therefore also to MicroLogic trip unit. See wiring diagram later in this section. -
Two RJ45 jacks.
The MicroLogic trip unit connects to the internal communication terminal block on the MasterPacT circuit breaker with the circuit breaker ULP cord. Connection to one of the RJ45 connectors on the FDM121 automatically establishes communication between the MicroLogic trip unit and the FDM121 and supplies power to the MicroLogic trip unit measurement functions.
When the second connector is not used, it must be fitted with a line terminator.
FDM121 Navigation
Five buttons are used for intuitive and fast navigation.
The “Context” button may be used to select the type of display (digital, bargraph, analogue).
The user can select the display language (Chinese, English, French, German, Italian, Portuguese, Spanish, etc.).
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1 Escape 2 Down 3 OK 4 Up 5 Context 6 Alarm LED |
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Product Identification |
Metering: Submenu |
Metering: Meter |
Services |
FDM121 Screens
Main Menu
When powered up, the FDM121 screen automatically displays the ON/OFF status of the device.
| Quick View | Metering | Control | Alarms | Services |
When not in use, the screen is not backlit. Backlighting can be activated by pressing one of the buttons. It goes off after three minutes.
Fast Access to Essential Information
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“Quick view” provides access to five screens that display a summary of essential operating information (I, U-V, f, P, E, THD, circuit breaker ON/OFF).
Access to Detailed Information
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“Metering” can be used to display the measurement data (I, U-V, f, P, Q, S, E, THD, PF) with the corresponding min/max values.
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“Alarms” displays active alarms and the alarm history.
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“Services” provides access to the operation counters, energy and maximum ammeter reset function, maintenance indicators, identification of modules connected to the internal bus, and the FDM121 internal settings (language, contrast, etc.).
Communication Components and FDM121 Connections
The FDM121 degree of protection is IP54 in front. IP54 is maintained after switchboard mounting by using the supplied gasket during installation.
FDM121 Connections
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Connections MasterPacT circuit breaker is connected to the ULP devices (FDM121 display, IFM, IFE or IO unit) via the circuit breaker ULP cord.
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A. Modbus Network B. Ethernet Network C. Circuit Breaker ULP Cord D. FDM Display E. ULP Termination F. ULP Cable |