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.
8 SOI/266-XC Rev. D | 2600T Series Pressure transmitters
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 Protective conductor / grounding
The transmitter operates within the specified accuracy with
common mode voltages between the signal lines and the
housing up to 250 V. In order to fulfill the requirements of the
low-voltage guidelines and the relevant EN 61010 rules for the
installation of electrical components, the housing must be
provided with a protective circuit (e.g. grounding, protective
conductor) if voltages of >150 VDC could occur. A connection
terminal is available for grounding (PE) on the transmitter
exterior and also in the plug. Both terminals are electrically
interconnected.
3.10 Transmitter with integrated Surge Protector
Use a short wire to connect the transmitter housing via the
earthing connection (PA) to potential equalization. Potential
equalization (min. 4 mm2) is necessary over the entire wiring.
3 Installation