Logic Relay; Intended Users; Proper Use; Improper Use - ABB CL Series Applications Manual

1SVC 440 795 M0100

Intended users

Proper use

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Logic relay

The logic relay must only be installed and wired up by trained
electricians or other persons familiar with the installation of
electrical equipment.
Specialist electrical training is needed for commissioning and
creating circuit diagrams. When controlling active
components such as motors or pressure cylinders, parts of
the system can be damaged and persons put at risk if the
logic relay is connected or programmed incorrectly.
The logic relay is a programmable switching and control
device and is used as a replacement for relay and contactor
control circuits. The logic relay must be properly installed
before use.
• The logic relay is designed to be installed in an enclosure,
switch cabinet or distribution board. Both the power feed
and the signal terminals must be laid and covered so as to
prevent accidental contact.
• The installation must comply with regulations for
electromagnetic compatibility (EMC).
• The power up of the logic relay must not cause any
hazards arising from activated devices, such as
unexpected motor startups or power ups.

Improper use

The logic relay should not be used as a substitute for
safety-related controls such as burner or crane controls,
emergency-stop or two-hand safety controls.
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