Electrical Connections; Cable Connections - ABB 2600T Series Operating Instruction

9

Electrical connections

The relevant directives must be complied with for the electrical
installation!
Because the transmitter cannot be switched off, surge
protection devices, lightning protection, or grid disconnect
possibilities must be provided at the plant.
NOTICE - material damage due to electrostatic
discharge!
An open cover does not provide contact
protection. Touching conductive parts can
damage electronic components (in some cases
beyond repair) due to electrostatic discharge.
Therefore, do not touch conductive components.
Check that the existing supply voltage corresponds to that
indicated on the rating plate. The same lines are used for both
the power supply and the output signal.
If an optional surge protector is provided and if the transmitter
is used in a hazardous area, energy must only be supplied via
a voltage source with galvanic isolation from the grid. Because
the inherently safe power circuits of the transmitter are
grounded, a sufficient equipotential bonding must be ensured
for the entire supply line.
DANGER – explosion hazard!
If the type of protection specified on the
certification plate does not agree with the
requirements imposed on the implementation site,
explosions or fires can be triggered. In this case
the transmitter must NOT be connected
electrically.
DANGER - severe health impairments / life-
threatening danger!
The lines can carry dangerous touch voltages and
cause electric shocks. An electric shock can be
fatal or can cause serious injuries. Consequently
do not touch the conductors and connection
terminals.
Change from two to one column
30 OI/266CXX/266JXX/HART-EN Rev. B | 266CRx, 266JRx, 266CSx, 266JSx
9.1

Cable connections

The electric connection is made using a 1/2-14 NPT or
M20 x 1.5 cable entry. Basically, a metal cable gland should
be provided for th Pt100 cable, since a shielded cable will be
used. Connect the shielding within the metal cable gland!
To ensure an 4X and IP 67 IP rating for the transmitter, the
cable gland must be screwed into the housing (1/2" NPT
female thread) using a suitable sealing compound.
IMPORTANT (NOTICE)
If cable glands are not used, the red transport
screw plugs must be replaced with suitable screw
plugs when the transmitter is installed. This is
because the transport screw plugs are not
certified as protected against explosion. This
requirement is particularly relevant in hazardous
areas.
IMPORTANT (NOTICE)
For the purpose of simulation, a 178 Ω resistor
(206°C / 402.8°F) with 2 jumpers has been
installed between the terminals for the Pt100
connection. This resistor (including the jumpers in
the case of 4-wire connections) must be removed
before connecting the Pt100. If a Pt100 is not
connected, the resistor must not be moved.
IMPORTANT (NOTICE)
For category 3 transmitters for use in "Zone 2" a
type of protection approved for this cable gland
must be provided by the customer (see chapter
"Ex-relevant technical data"). An appropriate
thread M20 x 1.5 must be provided in the
electronics housing for this purpose.
for transmitters with "Ex d", Flameproof
Enclosure" the housing cover must be arrested
with the securing screw.
The screw plug possible provided with the
transmitter must be inserted on site with the
sealant, Molykote DX. If a different sealant is
used, the responsibility rests with the executing
installer.
At this point we expressly state that after several
weeks the housing cover can only be unscrewed
with an increased expenditure of force. This is not
caused by the threads, but instead is due solely
to the type of seal.