Siemens SCALANCE M800 Operating Instructions Manual page 40

Installation
3.5 Installing on the S7-1500 standard rail
7. Connect the antenna, refer to the section "Antennas (Page 52)".
8. Connect the device to the local network, refer to the section "Ethernet port (Page 55)".
9. Connect the terminal with as short a cable as possible ≤ 150 mm and a large cross-
sectional area ≥ 1.5 mm² to the functional ground of the system, see section "Terminals
(Page 20)" and section "Grounding (Page 48)".
Dismantling
1. Disconnect all connected cables.
2. Using a screwdriver, pull down the catch on the rear of the device.
3. Remove the device from the standard rail.
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Operating Instructions, 08/2018, C79000-G8976-C331-08
SCALANCE M874, M876