Safety Instructions; In General; Target Group; Electrical Connection - IFM CR7021 Manual De Instrucciones

SafetyController CR7021

2 Safety instructions

2.1 In general

These instructions are part of the device. It contains information and illustrations
about the correct handling of the device and must be read before installation or
use.
Observe the operating instructions. Non-observance of the instructions, operation
which is not in accordance with use as prescribed below, wrong installation or
incorrect handling can seriously affect the safety of operators and machinery.

2.2 Target group

These instructions are intended for specialists. These specialists are people who
are qualified by their appropriate training and their experience to see risks and to
avoid possible hazards that may be caused during operation or maintenance of
the device.

2.3 Electrical connection

Disconnect the device externally before handling it. If necessary, also disconnect
any independently supplied output load circuits.
If the device is not supplied by the mobile on-board system (12/24 V battery
operation), it must be ensured that the external voltage is generated and supplied
according to the criteria for safety extra-low voltage (SELV) as this voltage is
supplied without further measures to the connected controller, the sensors and the
actuators.
The wiring of all signals in connection with the SELV circuit of the device must also
comply with the SELV criteria (safety extra-low voltage, safe electrical isolation
from other electric circuits).
If the supplied SELV voltage is externally grounded (SELV becomes PELV), the
responsibility lies with the user and the respective national installation regulations
must be complied with. All statements in this document refer to the device the
SELV voltage of which is not grounded.
The connection terminals may only be supplied with the signals indicated in the
technical data and/or on the device label and only the approved accessories of ifm
electronic may be connected.

2.4 Housing temperature

According to the technical specifications below the device can be operated in
a wide ambient temperature range. Because of the additional internal heating
the housing walls can have high perceptible temperatures when touched in hot
environments.
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