34
ION-B User Manual
TFAM
Case A
way.
Power Supply
The Case A Remote Unit is provided with a TPSN external power supply (Fig. 3.2.4 a,b),
available either for universal mains (90 to 264) or for negative supply. (-72 to -36 Vdc).
Visual Alarms:
Two control LEDs are provided on the TFAx front side (Fig. 3.2.2). The green LED indicates the
power supply status, while the red LED indicates any major Remote Unit failures (please refer to
Table 3.4).
Led colour Meaning
Red
Low optical power at DL input
and/or RF amplifi er failure
Green Power supply OK
Dry Contact Alarms:
TFAx is provided with two dry contact inputs which
can be connected (through .062” MOLEX plugs)
to any external device. The alarm information
regarding this external device is able to be
signalled through the red LED of the TFAx LED panel
and displayed on the Supervision System in this
Figure 3.2.3:
Dry contacts for external alarms
Figure 3.2.2 - LED alarms on
the upper-front side of Case
B Remote Units (including Power version)
Table 3.2.1 - Description of the LEDs
of Case-A remote unts
Figure 3.2.4 - The Case-A power supply inlet (a) can
be connected either with the ION-B 220Vac power
adapter (b) or with the -48 Vdc one ( c), depending
on the chosen version.
(b)
(c)
(a)
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