Weidmüller u-control UC20-WL2000-AC-CAN Manual page 38

6 Installation | Preparations for assembly
Use in a potentially explosive atmosphere
Please regard the safety notes in section 2.3.
If the u-control station is used in a potentially explosive
atmosphere rated as Zone 2, the housing must meet the
requirements of explosion protection type Ex n or Ex e and
degree of protection IP54. Sensors and actuators that are lo-
cated in Zone 2 or in a safe zone can be connected. All cable
glands on the housing must be approved for Ex e.
safe area
u-remote
Zone 2
Use in a potentially explosive atmosphere
Installation position
The u-control station is usually installed on a horizontally
positioned DIN rail.
42 mm
1.65"
42 mm
1.65"
Installation position of the u-control station on the DIN rail (horizontal installation)
Installation on vertically positioned DIN rails is also possible.
In this case however, the heat dissipation is reduced such
that the derating values change (see section 4.8).
38
no ex-approval
IP54
II 3G Ex ec
II 3G Ex ec nC
X1
X2
Manual u-control
In the case of vertical mounting, the controller must always
be arranged as the first module at the bottom and secured
with a reinforced end bracket for vertical mounting (Order no.
1805610000).
Installation distances
Depending on how the station shielding is imple-
mented, the specified distances may have to be
larger than those given below.
Ensure compliance with the minimum permissi-
ble cable bending radius.
In order to be able to carry out the installation and further
maintenance work and to ensure sufficient ventilation, the
u-control station must be installed while observing the fol-
lowing minimum distances. Earth terminals already installed
can be ignored when calculating the distance.
40 mm
1.57"
20 mm
X1
0.79"
X2
40 mm
1.57"
Minimum distances with horizontal installation
35 mm
1.38"
20 mm
0.79"
2604080000/08/08.2023