5.1.1 Grounding concept ............................................................................................................ 41
5.1.2 RI suppression measures .................................................................................................... 42
5.1.3 EMC limit values in South Korea ......................................................................................... 43
5.1.4 EMF assessments for 24 V components .............................................................................. 43
5.1.5 EC Declaration of Conformity ............................................................................................. 43
5.2 Climatic and mechanical environmental conditions ............................................................ 43
5.2.1 Shipping and storage conditions ........................................................................................ 43
5.2.2 Operating conditions ......................................................................................................... 45
6 Dimension drawings............................................................................................................................ 47
6.1 NCU 1740 dimension drawing............................................................................................ 47
7 Installation........................................................................................................................................... 49
7.1 Safety instructions ............................................................................................................. 49
7.2 Designs ............................................................................................................................. 50
7.3 Fix the NCU using spacers .................................................................................................. 51
7.4 Mounting the NCU without spacers.................................................................................... 51
8 Connecting .......................................................................................................................................... 53
8.1 Overview........................................................................................................................... 53
8.2 Communication services and used port numbers................................................................ 55
8.3 Safety information for wiring ............................................................................................. 58
8.4 Opening the front cover..................................................................................................... 58
8.5 Power supply ..................................................................................................................... 60
8.5.1 Application ........................................................................................................................ 60
8.5.2 Requirements for the power supply .................................................................................... 64
8.6 DRIVE-CLiQ components .................................................................................................... 65
8.6.1 Application ........................................................................................................................ 65
8.6.2 Connectable DRIVE-CLiQ components ................................................................................ 66
8.7 Use of Ethernet interfaces .................................................................................................. 68
8.8 PROFINET........................................................................................................................... 71
8.9 PROFIBUS DP...................................................................................................................... 73
8.9.1 Application ........................................................................................................................ 73
8.9.2 PROFIBUS cables and connectors........................................................................................ 75
8.9.3 Connection components in PROFIBUS................................................................................. 76
8.9.4 Rules for the laying of PROFIBUS cables .............................................................................. 76
8.9.5 Connecting PROFIBUS DP ................................................................................................... 77
8.9.6 Disconnecting stations from the PROFIBUS ......................................................................... 78
8.10 Digital inputs/outputs......................................................................................................... 78
8.10.1 DIO application.................................................................................................................. 78
8.10.2 Block diagram.................................................................................................................... 83
8.10.3 Connecting digital inputs/outputs ...................................................................................... 84
8.10.4 Technical data.................................................................................................................... 86
8.11 USB ................................................................................................................................... 87
Table of contents
NCU 1740
4 Equipment Manual, 10/2021, A5E51087503B AA
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