Appendix 3. IECEx Ex “ec”/ IECEx Type “n” of A2BN4D / A2BN5D
App.3-2
TI 33Q01J30-01E
Specific conditions of use
All the devices must be installed in the hazardous area in accordance with the marking shown
on
each device. When the equipment consists of several devices, ensure that the equipment
consists
only of the devices which can be used in the same hazardous environment.
• The equipment must be installed in an area of not more than Pollution Degree 2 as defined
in IEC 60664-1, and in an enclosure that provides a degree of protection of at least IP54 and
meets the relevant requirements of IEC 60079-0 and IEC 60079-15.
• All connections to the equipment must not be inserted or removed unless either the area in
which the equipment is installed is known to be non-hazardous, or the circuit to which it is
connected has been de-energised.
• The I/O modules fitted to the backplane do not form part of the certification and must be
separately appropriately certified.
• Provision shall be made (whether part of the certified I/O modules fitted to the backplane or
externally fitted) to provide transient protection on the supply terminals to be set at a level
not exceeding 140% of the peak rated voltage value of 85V.
Installation
Precautions of installation for A2BN4D are same as those for IECEx Ex “ec” products.
For information about installation, refer to:
Installation in Appendix 1.3 “CSA NI/FM NI/IECEx Ex “ec”/ECAS-EX Ex “ec” Control Drawing of
FCU (for N-IO system), N-IO Node Unit, and FIO Node Unit
Maintenance and repair
Precautions of maintenance and repair for A2BN4D are same as those for IECEx Ex “ec”
products.
For information about maintenance and repair, refer to:
Maintenance and Repair in Appendix 1.3 “CSA NI/FM NI/IECEx Ex “ec”/ECAS-EX Ex “ec”
Control Drawing of FCU (for N-IO system), N-IO Node Unit, and FIO Node Unit
Apr. 25, 2022-00
