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Installation
7.1
Safety instructions
Please note the following:
● The device is only approved for operation in rooms that can be closed and locked.
● The device may only be installed on concrete or other non-flammable surfaces.
● The MCU is exclusively intended for installation in ESD-protected areas. The CE-
associated ESD interference immunity limit values can only be achieved via installation in
the control cabinet. Only make physical contact using appropriate ESD protective
measures.
● For installation in a control cabinet, observe the SIMATIC installation guidelines and
applicable DIN/VDE requirements or other applicable country-specific regulations.
● When the device is used in the area of Industrial Control Equipment, note that it is classified
as "Open Type" in accordance with UL 61800‑5‑1. The installation of the device in an
enclosure conforming to UL 61800‑5‑1 is therefore a mandatory requirement for approval or
operation in accordance with UL 61800‑5‑1.
Open equipment
These modules are open equipment. This means they may only be installed in housings,
cabinets or in electrical service rooms that can be entered or accessed exclusively by means
of a key or tool. Housings, cabinets, or electrical equipment rooms may only be accessed by
trained or authorized personnel. An external fire protection casing is required.
NOTICE
The module can be damaged if power is connected to the MCU when installing/removing it
When installing the MCU, the system and the MCU must be disconnected (brought into a no
voltage condition).
Securing the device
NOTICE
Insufficient load carrying capacity
If the wall it is mounted on does not have a sufficient load-bearing capacity, the device may fall
and be damaged.
Ensure that the mounting surface on the wall can bear four times the total weight of the device,
including fixing elements.
MCU 1720
Equipment Manual, 09/2019, A5E47437728B AB
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