Connecting The Cables - Siemens SIMATIC NET SCALANCE W786 Series Operating Instructions Manual

Connecting up

6.3 Connecting the cables

Only use cables suitable for high temperatures!
If temperatures in excess of 70 °C occur on the cable or at the housing socket, or the
temperature at the branching points of the cables exceeds 80 °C, special measures need to be
taken.
If the equipment is operated at an ambient temperature of 45 - 60 °C, only use cables with
maximum permitted operating temperature of at least 90 °C.
6.3 Connecting the cables
Procedure
Danger from line voltage
If the housing is not perfectly sealed, there is a danger to life due to the line voltage if the
SCALANCE W786 is subjected to spray water or dampness. Make sure that you keep to the
following safety rules.
• Before connecting up, turn of the power supply.
• The sealing of the cable feedthroughs of the SCALANCE W786 is only assured when the
• Never wrap insulating tape, adhesive tape or other materials around thinner cables to
• Close all unused openings in the housing seal with the sealing plugs supplied with the
Danger from line voltage
If the supply cable of a power supply adapter for 100 to 240 VAC is disconnected from the line
power, a dangerous voltage may be present for a brief period.
For this reason, do not connect the contacts of the supply cable to the mains power supply
using a plug-in connector but screw the contacts to a terminal block that can be disconnected
from the mains power by a switch.
54
WARNING
WARNING
cable has a suitable diameter and adequate tensile strength. Only use cables that meet the
specifications in the section "Cables for the SCALANCE W786".
achieve the required diameter. In this case, neither the housing seal nor the strain relief
clamps can fulfill their function.
SCALANCE W786. Do not use fillers or any other material under any circumstances.
WARNING
Operating Instructions, 12/2021, A5E03678337-14
SCALANCE W786-x