
TERMITRAB complete
107820_en_00 PHOENIX CONTACT 5 / 8
5Versions
Combine various circuits and features according to the
relevant requirements.
5.1 Pluggability and testing
Pluggable and testable products are indicated with the letter
“P” in the order key.
Surge protection products are designed for use over a long
period of time. When used as intended within the specified
parameter ranges, the service life of the products can run
into many years. During this time, the surge protection
processes a large number of transient overvoltages. The
end device is protected effectively.
However, in the event of intensive overload the quality of
protection may decrease. By testing, you can determine
whether protection is sufficiently effective, or whether
protective devices are already impaired. These tests and
their documentation are a mandatory requirement in some
areas of industry.
TERMITRABcomplete offers two-piece, pluggable
protective devices. They enable protective plugs to be easily
removed from the base element.
The plug can be tested with the CHECKMASTER2 from
Phoenix Contact. To this end, a barcode is printed on the
plug. The scanner on the CHECKMASTER2 automatically
identifies the corresponding product when the data is read
in. The corresponding template is loaded so that the
CHECKMASTER2 can compare the target and actual
parameter ranges of the protective elements.
If the tested plug is no longer within the intended range,
replacement is recommended. Replacement plugs are
available from Phoenix Contact for such a case.
The order number on the base element is valid for the
complete item comprising the base element and plug. The
order number for the plug is intended for reordering
replacement items.
When plugged in, a snap-in lever prevents the plug from
moving even in the event of strong vibrations. A mechanical
coding system ensures that only matching plugs and base
elements can be connected together.
Insertion and removal is impedance-neutral, which means
that signals are not interrupted during maintenance work
and testing. The cables connected to the base element
remain fixed in the installation.
Figure 1 TERMITRABcomplete, pluggable
5.2 Indirect grounding (floating)
Products with indirect grounding are indicated with the letter
“F” in the order key.
In scenarios where direct grounding of the third terminal
level (terminal blocks 3 - 6) is not desirable, versions with an
additional gas discharge tube for the DIN rail are used.
Example: a common reference potential (common return
conductor) is led via the third terminal level, however this
must not have a ground connection to the surge protection.
An additional gas discharge tube is useful in such a case
Figure 2 Indirect grounding
5.3 Knife disconnection
Products with knife disconnection are indicated with the
letter “M” in the order key.
Disconnect terminal blocks are frequently used in sensor/
actuator cabling. These disconnect terminal blocks are
installed between the modules for measurement and control
technology and the cables led into the field. The disconnect
terminal blocks can be used to interrupt signal circuits in
order to conduct measurements in the field.
The disconnection option can be used on the top two
terminal levels. Isolator1 opens and closes the signal on the
field side directly at terminal point1. Isolator2 opens and
closes accordingly directly at terminal point2.
For example, insulation measurements can be carried out
on the cables without the surge protection components
distorting the test results.
The dielectric strength of the knife disconnection is 2.5kV
(1.2/50µs).