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STI S.r.l.
– Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com
Manual 9031, rev. 02 27/02/2018 – FTC
- 2 -
-
The laptop used must be powered from battery or by a power supply unit in
compliance with IEC 60950-1 with Maximum Output Voltage
(Um)
≤ 30V.
Warning
In case of “minimum ambient temperature” below -40°C, the optional FEEDBACK
cannot be connected and the jumpers on the PCB FTCompact-PW, for internal
circuit connection, must be removed by the User.
Figure 2 – FTC-I electric circuit
Warning
Highlighted in the red circle are the jumpers (JP1, JP2 and JP3) that must be
removed to exclude the feedback circuit when the minimum temperature can be
below -40°C.
Important
Positioners series FTC-Ixxxxxx are designed and certified in conformity to the
European Directive 2014/34/EU, and according to the International IECEx Scheme.
The Positioners shall be connected to 1 or 2 [Ex ia] or [Ex ib] Associated Apparatus (Diode Safety Barrier or
Galvanic Isolator), in compliance with the maximum voltage (Ui), current (Ii) and power (Pi) values stated in
the label (see "Rated characteristics"). In both cases the Positioner can be installed in Zone 1 (or Zone 2),
but when the whole system has "ib" protection level, the Positioner shall not be used to modulate natural gas
(CH
4
). In case the system has "ic" protection level, the Positioner may be installed only in Zone 2 and, of
course, it cannot be used to modulate natural gas (CH
4
).
The Positioner shall be installed in compliance with EN IEC 60079-14 Standard (current Issue) and any
inspection maintenance shall be carried out following the provisions of EN IEC 60079-17 Standard (current
Issue); all Intrinsically Safe circuits shall be included in Descriptive System Documents (EN IEC 60079-14,
art. 4.2 and EN IEC 60079-25, art. 4).
