User manual

Use in a potentially explosive atmosphere
If the u-remote station is used in a potentially explosive
atmosphere rated as Zone 2, the housing must meet the re-
quirements of explosion protection type Exn or Exe and pro-
tection class IP54. Sensors and actuators that are located in
Zone 2 or in a safe zone can be connected. All cable glands
on the housing must be approved for Exe.
IP54
Zone 2
safe area
no ex-approval
u-remote
II 3G Ex nA
II 3G Ex nA nC
Use in a potentially explosive atmosphere
Installation position
The u-remote station is usually installed on a horizontally
positioned DIN rail.
42 mm
1.65"
42 mm
1.65"
Installationpositionoftheu-remote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 4.5).
In the case of vertical mounting, the eld-bus coupler must
always be arranged as the rst 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 im-
plemented, the specied distances may have
to be larger than those given below.
Ensure compliance with the minimum permis-
sible cable bending radius.
In order to be able to carry out the installation and further
maintenance work and to ensure sufcient ventilation, the u-
remote station must be installed while observing the follow-
ing minimum distances. Earth terminals already installed can
be ignored when calculating the distance.
40 mm
1.57"
35 mm
1.38"
40 mm
1.57"
20 mm
0.79"
20 mm
0.79"
Minimumdistanceswithhorizontalinstallation
Installation | Preparations for assembly
234 1432790000/03/02.2014Manual u-remote