User's Manual Part 1

Visual alarms:

Two control LEDs are

provided on the TFAxxx

front side.

The green LED describes

the power supply status,

while the red LED

describes the major Remote

Unit failures.

Dry contact alarms:

TFAxxx is provided with

two dry contacts inputs,

which can be connected

(through .062” MOLEX

plugs) to any external

device (ie. the TFBW

booster). In such a way, the

alarm information about

this external device can be

signalled through the red

LED of TFAxxx LED panel

stated above.

Led colour

Meaning

Red

Low optical power at DL input

and/or RF amplifier failure

Green Power supply status

Power supply:

TFAxxx can be powered by universal mains (85/265 Vac) and by negative supply (-72/-36 Vdc).

Power supply adapter is included in the remote unit and can be external or internal according to the

different models and part numbers:

 Case A: internal for all models with only exception of TFAN20 that has external adapter

 Case B: always external adapter for all models

Case A Remote Unit (except TFAN20)

These Remote Units are provided with internal power supply both for the 220VAC option and for the

-48VDC option. As shown in the figure below different power supply connectors are provided for the

two versions:

Dry contacts are open under

non-alarm condition

TFAxxx LED

contacts

-48VDC version

(4 poles connector)

220VAC version

(IEC connector)

MN024-04