20 TTF300 FIELD-MOUNT TEMPERATURE TRANSMITTER | OI/TTF300-EN REV. I
… 3 Use in potentially explosive atmospheres in accordance with cFMus,
FM and CSA
Installation instructions
The installation, commissioning, maintenance and repair of
devices in areas with explosion hazard must only be carried out
by appropriately trained personnel.
The operator must strictly observe the applicable national
regulations with regard to installation, function tests, repairs,
and maintenance of electrical devices. (e. g. NEC, CEC).
Warnings and instructions should be followed as per notes on
the associated control drawing for installation in the
associated hazardous area.
The control drawings are available for download under the
following link. Just scan or click on the QR code:
ABB Library – TTF300 – control drawings
Electrical connections
Grounding
If, for functional reasons, the intrinsically safe circuit needs to be
grounded by means of a connection to the potential
equalization, it may only be grounded at one point.
Note
When operating the transmitter in Zone 0, the compatibility of
the device materials with the surrounding atmosphere must be
guaranteed.
Encapsulation material used for the transmitter:
Polyurethane (PUR)
Installation in a potentially explosive atmosphere
Transmitters can be installed in all kinds of industrial
sectors.Potentially explosive systems are divided into zones,
meaning that a wide range of different instruments are also
required.For this, pay attention to the country-specific
guidelines and certificates!
Commissioning
The commissioning and parameterization of the device may also
be carried out in potentially explosive atmospheres using a
handheld terminal that has been approved accordingly under
consideration of an intrinsic safety installation check.
Alternatively, an Ex modem can be connected to the circuit
outside the potentially explosive atmosphere.
Operating instructions
Risk of explosion due to hot parts
Hot parts inside the device pose an explosion hazard.
• Never open the device immediately after switch-off.
• A waiting time of at least four minutes should be observed
before opening the device.
Explosion hazard when opening the device
Explosion hazard when opening the device with activated
power supply.
• Before opening the device, switch off the power supply.
Adverse effect on the ‘Explosionproof – XP’ type of
protection
The cover thread is used as a flameproof joint for the
‘Explosionproof – XP’ type of protection.
• During assembly / disassembly of the device, make sure that
the cover thread does not get damaged.
• Devices with damaged threads must no longer be used in
potentially explosive atmospheres.
Protection against electrostatic discharges
The painted surface of the housing and the plastic parts inside
the device can store electrostatic charges.
Risk of explosion!
The device must not be used in areas in which process-related
electrostatic charging of the housing may occur.
• The device must be installed, maintained and cleaned such
that any dangerous electrostatic charge is avoided.
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