Manual ELW 170 / ELW 180
May 2020
page 3
6. Mounting and installation
Before the device is mounted, ensure that it is not displaying signs of any physical damage
or damage caused by moisture, which may have come about due to improper transport or
storage.
The housing protection category is IP65. Ensure that the housing remains free of deposits
and moisture. The terminals and connection cables should be checked regularly to ensure
they are secure and must be free of vibrations.
The ambient temperature limits stated in the technical data should be observed.
6.1 Mounting
ELW 170: The device is mounted on a level base using suitable screws (not included in scope of delivery).
The device can be mounted in any position.
ELW 180: The device is mounted on the duct using the mounting flange included in scope.
6.2 Connecting to the electricity
The rated voltage (mains) and other key electrical data are stated on the device’s type plate and in chap-
ter 9 “Technical data”. The cable cross-section for auxiliary energy (mains) and the main fuse used must
be matched to one another according to the standards and specifications applicable locally.
The 2x2-pin terminal block for the rated voltage and the two 3-pin terminal blocks for the potential-free
relay contacts are designed for cable cross-sections up to 2.5 mm².
The 2x2-pin terminal block for the sensor contacting is sized in accordance with requirements for smaller
cable-cross-sections up to 1 mm².
.
6.2.1 Connecting to the auxiliary energy supply
Alternatively, the devices can be operated with a mains voltage of 100-240 VAC 50/60 Hz
or a low voltage of 24 V ±10 % AC/DC.
Two pairs of terminals 1/2 and 3/4 are provided for this purpose and must not be inter-
connected at the same time.
All work associated with connecting to the auxiliary energy supply may only be undertaken
when de-energised.
The mains voltage is connected to terminals 1 and 2.
The 24 V low voltage is connected to terminals 3 and 4.
Observe the limit values for the auxiliary energy feed-in (refer to technical data for details). The upstream
fusing element should be sized in accordance with generally applicable standards and directives.
Once the cables have been installed and while the system is de-energised,the cover for the terminals and
electronics should be fitted.
