Hardware Description - FDM121 User Guide

Description

A	Alarm indicator LED
B	LCD screen
C	Navigation keys
D	Functional ground
E	2 RJ45 ULP ports
F	24 Vdc power supply terminal block

Alarm Indicator LED

The orange alarm indicator LED alerts the user when a new high-priority or medium-priority alarm is detected in the IMU. It also indicates that one of the ULP modules of the IMU is in degraded mode or off.

Alarm indicator LED status	Meaning
Steady OFF	Nominal operation (no high-priority or medium-priority alarm detected, no module in degraded mode or off)
Blinking	At least one high-priority alarm is present in the Event Log list and has not been acknowledged by the user. An IMU module is off. The LED goes off after acknowledgment on the non-operational module or when the module concerned is no longer off.
Steady ON	At least one medium-priority alarm is present in the Event Log list and there is no high-priority alarm. An IMU module is in degraded mode. The LED goes off after acknowledgment on the degraded module or when the module concerned is no longer degraded.

For more information on the management of events and alarms, refer to the Alarms menu.

Factory Reset

You can reset the FDM121 display to its factory default settings by pressing and holding the Back/Home key and Context-Sensitive key simultaneously for 8–12 seconds. For more information, refer section Navigation Keys.

After reset, the device restarts and restores the following settings to their factory default values:

Parameter	Default Value
Brightness	50%
Contrast	50%
Language	English UK
Temperature Unit	°C
Volume Unit	m³
ULP Password	1111, 2222, 3333, or 0000

Functional Ground

In an environment with a high level of electromagnetic disturbance, connect the FDM121 display functional ground to the local machine ground in the switchboard by using a grounding strip.

24 Vdc Power Supply

NOTICE
HAZARD OF EQUIPMENT DAMAGE It is recommended to use an UL listed/UL recognized limited voltage/limited current or a class 2 power supply with 24 Vdc, 3 A maximum. For more information, refer to the ULP System User Guides provided in the section Related Documents. Failure to follow these instructions can result in equipment damage.

The FDM121 display is supplied either through the ULP cables or by direct connection of the power supply to the FDM121 power supply terminal block:

For a communicating architecture, connect the 24 Vdc power supply to the connector on the IFM or IFE communication interface. The communication interface powers the other modules on the IMU through the ULP cables.

In this architecture, the FDM121 power supply terminal block can be removed to reduce the dimensions.
For a standalone architecture, connect the 24 Vdc power supply to the FDM121 power supply terminal block. The FDM121 display powers the other modules on the IMU through the ULP cables.

Power supply terminal block	Wire	Color	Description	Cross-section	Stripped length
		Black	0 V	0.2–1.5 mm² (24–16 AWG)	7 mm (0.28 in)
		Red	24 Vdc	0.2–1.5 mm² (24–16 AWG)	7 mm (0.28 in)

The FDM121 power supply terminal block has two points per terminal to simplify, if necessary, distribution of the power supply to other devices in the switchboard.

ULP Connection

NOTICE
HAZARD OF EQUIPMENT DAMAGE The FDM121 RJ45 ports are for ULP modules only. Any other use can damage the FDM121 display or the device connected to it. To check if a ULP module is compatible with the FDM121 RJ45 ports, refer to the ULP System User Guides provided in the section Related Documents. Failure to follow these instructions can result in equipment damage.

Use the two RJ45 ULP ports on the FDM121 display to connect it to the IMU. Both ULP ports are identical and in parallel, allowing the ULP modules of the IMU to be connected in any order.

When the second RJ45 ULP port is not used, it must be closed with an ULP line termination.

Mounting

There are two possible mounting configurations for the FDM121 display:

Mounting in a door cut-out fasten with a clip.
Retrofit mounting through drill holes and secured with a surface-mounted accessory.

Door Cut-Out Mounting

Mount the FDM121 display by cutting a standard 92 x 92 mm (3.622 x 3.622 in) cut-out on the door and pushing FDM121 display through the hole until secured by clips.

Hole Mounting

Mount the FDM121 display by drilling two holes 22.5 mm (0.89 in) in diameter and securing the FDM121 display by using a surface-mounting accessory and a locking nut.

If the FDM121 power supply terminal block is used to power the IMUs, a third cut-out made up of two drill holes 22.5 mm (0.89 in) in diameter is needed.