Table of contents
Preface ................................................................................................................................................... 3
1
Security recommendations ...................................................................................................................... 9
2
Description of the device ....................................................................................................................... 15
2.1
Product characteristics............................................................................................................ 15
2.2
Accessories ............................................................................................................................. 17
2.3
Terminals ................................................................................................................................ 20
2.4
LED display ............................................................................................................................. 22
2.4.1
SCALANCE M874-2, M874-3 ................................................................................................. 22
2.4.2
SCALANCE M876-3, M876-4 ................................................................................................. 26
2.5
SET button .............................................................................................................................. 28
2.6
C-PLUG and KEY-PLUG ........................................................................................................ 30
3
Installation ............................................................................................................................................ 31
3.1
Securing the housing .............................................................................................................. 32
3.2
Wall mounting ......................................................................................................................... 34
3.3
3.4
3.5
3.6
4
Connecting up ....................................................................................................................................... 43
4.1
Safety when connecting up ..................................................................................................... 43
4.2
SIM card .................................................................................................................................. 45
4.3
Power supply .......................................................................................................................... 46
4.4
Grounding ............................................................................................................................... 48
4.5
Digital input/output .................................................................................................................. 49
4.6
Antennas ................................................................................................................................. 52
4.7
Ethernet port ........................................................................................................................... 55
4.8
5
Dimension drawings .............................................................................................................................. 59
5.1
SCALANCE M874-2, M874-3 ................................................................................................. 59
5.2
SCALANCE M876-3, M876-4 ................................................................................................. 61
SCALANCE M874, M876
Operating Instructions, 08/2018, C79000-G8976-C331-08
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