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AW T 2 1 0 | 2 - W I R E C O N D U C T I V I T Y, P H/O R P, P I O N T R A N S M I T T E R | O I/A W T 2 1 0 - E N R E V. C
4 Hazardous area considerations
Special regulations must be observed in hazardous areas for
the auxiliary power connection, signal inputs/outputs and
ground connection.
DANGER
• All parts must be installed in accordance with
manufacturer information and relevant standards and
regulations.
• Startup and operation must be performed in accordance
with ATEX User Directive 99/92/EC or BetrSichV
(EN60079-14).
Approvals
CE Mark
The AWT210 transmitter meets all requirements for the CE
mark in accordance with applicable EC Directives 2004/108/EC
(EMC), 2006/95/EC (LVD) and 94/9/EC (ATEX).
Ignition protection
The AWT210 transmitter is available with FM, CSA and ATEX/IEC
approval. Hazardous area relevant information is included later
in this section.
Ground
If for functional reasons, the intrinsically safe circuit must be
grounded by connecting it to an equipotential bonding system,
it must be grounded at a single location only.
Interconnection
Special interconnections, dependent on the safety
requirements, are required when the transmitter is used in
hazardous areas. Proof of interconnection may be required
during the installation if the transmitter is operated in an
intrinsically safe circuit.
Power supply for intrinsically safe applications
The power supply SPS inputs must have corresponding input
protection circuits available to eliminate spark hazards. An
interconnection inspection must be performed. For proof of
intrinsic safety, the electrical limit values must be used as the
basis for the prototype test certificates of the transmitters,
including the capacitance and inductance values of the wires.
Proof of intrinsic safety is granted if the following conditions
are fulfilled.
Output parameter of
power supply/SPS input
Max. output voltage
Max. output current
Max. output power
Max. output inductance
Max. output capacitance
Configuration
AWT210 transmitters can be installed in hazardous areas in
compliance with proof-of-interconnection and directly in a
hazardous area using approved handheld HART/Fieldbus
terminals (proof of interconnection may be required during the
installation) as well as by coupling an ignition-proof modem to
the circuit outside the hazardous area.
Service and repair
DANGER
This product has no live maintenance facility. The
instrument must be de-energized before any maintenance is
performed.
If the instrument is located in a hazardous area, other than the
serviceable items listed in Appendix D, page 60, none of the
instrument's components can be serviced by the user. Only
personnel from ABB, its approved representative(s) or persons
conversant with the construction standards for hazardous area
certified equipment, is (are) authorized to attempt repairs to
the system and only components formally approved by the
manufacturer should be used. Any attempt at repairing the
instrument in contravention of these principles could cause
damage to the instrument and corporal injury to the person
carrying out the repair. It renders the warranty null and void
and could compromise the hazardous area certification,
correct working of the instrument, electrical integrity and the
CE compliance of the instrument.
If you have any problems with installation, starting or using
the instrument please contact the company that sold it to you.
If this is not possible, or if the results of this approach are not
satisfactory, please contact the manufacturer's Customer
Service.
Risk of electrostatic discharge
If the instrument is mounted in a hazardous area and the
exterior of the instrument requires cleaning, care should be
taken to minimise the risk of electrostatic discharge. Use a
damp cloth or similar to clean all surfaces.
Input parameter of
AWT210 transmitter
Uo
≤
Ui
Max. input voltage
Io
≤
Ii
Max. input current
Po
≤
Pi
Max. input power
Internal inductance +
Lo
≥ Li+Lc
inductance of cable
Internal capacitance +
Co
≥ Ci=Cc
capacitance of cable
7
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