Appendix 3. IECEx Ex “ec”/ IECEx Type “n” of S2BN4D / S2BN5D
App.3-2
TI 32S01J30-01E
• The I/O modules tted to the backplane do not form part of the certication and must be
separately appropriately certied.
• Provision shall be made (whether part of the certied I/O modules tted to the backplane or
externally tted) 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 S2BN4D are same as those for IECEx Ex “ec” products.
For information about installation, refer to:
Installation in Appendix 1.2 US (FM) NI/Canada (FM) NI/IECEx Ex “ec”/ECAS-EX Ex “ec” Control
Drawing of SCU (S2SC70) and N-IO Node Unit
Maintenance and repair
Precautions of maintenance and repair for S2BN4D are same as those for IECEx Ex “ec”
products.
For information about maintenance and repair, refer to:
Maintenance and Repair in Appendix 1.2 US (FM) NI/Canada (FM) NI/IECEx Ex “ec”/ECAS-EX
Ex “ec” Control Drawing of SCU (S2SC70) and N-IO Node Unit
Apr. 25, 2022-00
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