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Operating Instructions Temperature Controller TC DB
HOM148163467Ien-4 Page 3 / 7
INTERTEC-Hess GmbH · Raffineriestr. 8 · 93333 Neustadt/Donau · Germany ·
+49 9445 9532-0 ·
[email protected]1 Use
The digital temperature controller TC DB is
manufactured according to Directive INMETRO No. 115,
of March 21st, 2022 and is intended, among other
things, for controlling the temperature of enclosures,
cabinets or heat trace cables.
The TC DB is delivered with the index "J" and can be
switched together on site with the heating source to be
regulated. It is equipped with an external sensor -index
"E"- and with the HI version can be provided with an
additional sensor connection for controlling the heating
source.
The temperature controller approved in Ex zone 1 and 2
for device categories G/D, in temperature class T4.
2 Special conditions for safe use
1. Each temperature regulator shall be provided on the
line side with a short-circuit protection in the form of
a fuse designed to meet the regulator current rating
(max. 3xl b in compliance with ABNT NBR IEC
60127-2-1) or a motor overload trip with
instantaneous short-circuit and thermal release
(adjusted to match the current rating). For very low
rated currents of the temperature regulator, the fuse
with the lowest current rating according to the above
referenced ABNT NBR IEC standard will suffice. The
fuse may be accommodated in the corresponding
power supply unit or it shall be connected separately
on the line side. The fuse voltage rating shall be the
same or greater than the temperature regulator
voltage rating specified. The breaking capacity of the
fuse link shall be the same or greater than the
maximum short-circuit current expected at the place
of installation (normally 1500 A).
2. Should the temperatures at the cable entry of
temperature regulators with terminal box be higher
than 70°C, or higher than 80°C at the wire junction,
this equipment shall carry an additional mark
showing the higher temperatures (label at the cable
entry). In that case only a heat-resistant connecting
cable may be used.
3. If the cable used is not scratch resistant, it shall be
protected against mechanical damage (e.g.
interrupted conduit system with edge protection
moulding).
4. When installed in the dust explosion protection area,
only components with the required certification may
be used.
5. If connection is made in the potentially explosive
area, equipment with an open-ended line shall have
the connecting lead connected in an enclosure that
meets the requirements of an approved type of
protection in compliance with ABNT NBR IEC
60079-14.
6. When using components, due care shall be taken
that they may only be employed within the
temperature range they have been certified for.
3 Explanation of symbols for warnings
and signal words
The safety information warns the user about risks and
provide information on how risks can be avoided.
Safety information can be found at the start of the
chapter before the instructions which may lead to a
hazardous situation. Additional safety information can be
found at the beginning of this manual.
Safety instructions which must be adhered to are
highlighted as follows:
DANGER
DANGER
This sign is warning about an extremely hazardous
situation which, if not heeded, will lead to death or
serious irreversible injury.
WARNING
WARNING
This sign is warning about a hazardous situation which,
if not heeded, may lead to death or serious irreversible
injury.
CAUTION
NOTICE
This sign is warning about a hazardous situation which,
if not heeded, may lead to slight, reversible injury.
