Electrical Connection - ABB 2600T Serie Bedienungsanleitung

3.8 Electrical connection

The relevant guidelines must be observed during the electrical
installation! Since the transmitter has no switch-off elements, it is
important to provide the possibility of disconnecting the power main
or providing over-current protection devices on the system side (over
voltage protection may be selected as a transmitter option).
An open cover does not provide a protection against accidental
contact. Do not touch any conductive components.
Check that the existing operating voltage corresponds to that
indicated on the type plate. For power supply and output signal, the
same lines are used. Use the enclosed connection diagram!
The electrical connection is made via cable entry 1/2-14 NPT or M 20
x 1.5 (or via optional plug Han 8 U).
Important. The red plugs are to be removed when the transmitter is
installed in Hazardous area. They are not explosion proof certified
products.
To ensure the Type 4X and IP 67 degree of protection for transmitter
according to Canadian Standard CSA, the conduit must be screwed
into the housing 1/2" NPT female using a suitable sealing compound.
The blanking plug has been sealed with Molykote DX, the use of any
other sealing compound is done so at owners own risk.
3.8.1 Electrical requirements – HART
The transmitter operates on a minimum voltage of 10.5 Vdc to a
maximum of 42 Vdc and is protected against polarity inversion.
Installing optional devices the minimum voltage increases to:
— 10.5 Vdc with no option or with integral digital display links
— 12.3 Vdc with surge protection
The total loop resistance is the sum of the resistance of all elements of
the loop, including wiring, conditioning resistor, safety barriers and
additional indicators (excluding the equivalent resistance of the
transmitter). Where a configuration device (HART), such as the Hand
Held Communicator or a Modem is likely to be used, a resistance of
250 ohm minimum should be present between the power supply and
the point of insertion of these devices, to allow communication.
Several types of safety barriers, either passive or active, can be
satisfactorily used in conjunction with the Smart 2600T transmitter.
Nevertheless, in case of use of active barriers, check with the supplier
if the model is suitable for use with smart transmitters allowing the
connection of the configuration devices in the "safe" or non-hazardous
area.
3.8.2 Electrical requirements – PROFIBUS PA
PROFIBUS-PA transmitters are provided for the connection to
segment couplers DP/PA. The permissible voltage at the terminals is
DC 9 - 32 V (9 - 17.5 V for FISCO). The current is approx. 15 mA
(average; sending). A shielded cable is recommended.
Contacting of the shield is done in the metal screwing. The transmitter
must be grounded; the shield must be grounded as well only at one
point. For further information, please refer to PROFIBUS PA installation
guide. When operating with an Ex-segment coupler, the max number
of devices may be reduced by a time-dependent current limitation.
The output signal of the transmitter is transferred digitally according to
IEC 61158-2.
The instrument is compliant to Profile 3.02. Its Identification No. is
3450 HEX. During cyclic data traffic, the OUT variable is transmitted. It
is composed of the output value and 1 byte status information. The
output value is transmitted with 4 bytes as IEEE-754
Floating-Point-Type.
3.8.3 Electrical requirements – FOUNDATION Fieldbus
Foundation Fieldbus transmitters are provided for the connection to
H1 BUS.
The permissible voltage at the terminals is DC 9 - 32 V
(9 - 17.5 V for FISCO). The current is approx. 15 mA (average;
sending). A shielded cable is recommended. Contacting of the shield
is done in the metal screwing. The transmitter must be grounded; the
shield must be grounded as well only at one point. For further
information, please refer to FOUNDATION Fieldbus installation guide.
When operating with an Ex-application, the maximum number of
devices may be reduced by a time-dependent current limitation.
The output signal of the transmitter is transferred digitally according to
IEC 61158-2. FF transmitter is registered as link master device
according to FF specification Version 1.7. There are different ways of
displaying and performing configuration on Fieldbus FOUNDATION
devices. DD (Device Description) and DD methods allow transmitter
configuration and data displaying across platforms.
3.9 Grounding
Pressure transmitter housing should be grounded or earthed in
accordance with national and local electrical codes. Ground
connection is mandatory for surge protector equipped devices in
order to ensure proper functioning.
Protective grounding terminals (PE) are available outside and/or inside
the housing of the transmitter. Both ground terminals are electrically
connected and it up to the user to decide which one to use. The most
effective transmitter case grounding method is direct connection to
earth ground with impedance equal or less of 5 ohm.
3.10 Surge protector equipped terminal block
(optional)
The pressure transmitter housing with surge protector
(code S2) inside the terminal board must be connected using
the grounding terminal (PE), by means of a short connection
with the equipotential bonding.
Equipotential bonding conductor must to have 4.00mm² of
maximum cross-section.
Important. Test voltage withstand capability can no longer be ensured
when this protective circuit is used.
3.11 Common mode voltages
266 pressure transmitter operates within the specified levels of
accuracy for common-mode voltages of up to 250V between lines
and housing grounded and up to 150V not grounded.
2600T Series Pressure transmitters | SOI/266-XC Rev. J 7
3 Installation