KROHNE OPTISYS SLM 2100 EN - Manual (Page 33)

ELECTRICAL CONNECTIONS
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OPTISYS SLM 2100
www.krohne.com 03/2014 - 4002737302 - MA OPTISYS SLM 2100 R02 en
4.10 Description and properties of the relays
The two relays can be either configured as limit switch or as status output.
In status output mode:
If an error of the selected class occurs the relays remains active, until the error is cleared by the
user or the device is leaving the error state automatically.
In limit switch mode:
When the relay is configured as limit switch the limit parameter used is the sensor position
(height / depth). The relays can work as limit switch only in level and zone tracking mode. The
parameter "direction" defines the trigger for the relay, which means the relay is switched either
when the sensor position about limit value or the sensor position below limit. The hysteresis
defines the sensor position, where the limit switch (relay) is reset, relatively to the selected
threshold. Combining the parameters threshold and hysteresis a range can be defines, were the
limit switch is active. The relay configuration menus can be found in the setup I/O menu. For
more information refer to
Menu C, setup on page 46.
4.10.1 Connection of the relays
DANGER!
Never install or operate the device in potentially explosive areas, it might cause an explosion that
can result in fatal injuries.
DANGER!
All work on the electrical connections may only be carried out with the power disconnected.
INFORMATION!
Assembly materials and tools are not part of the delivery. Use the assembly materials and tools
in compliance with the applicable occupational health and safety directives.
INFORMATION!
The correct connection of the relays takes place with the signal cables which are approved for
the rated current and voltage.
INFORMATION!
All cables must have a test voltage of min. 2 kV and an appropriate outer insulation (additional to
the insulation of the individual wire). The outer insulation should be removed 40 mm / 1.57". The
minimum cross section of the wires is 1.5 mm
2 / 0.0023 square inch and the maximum is
2.5 mm 2 / 0.0039 square inch.
INFORMATION!
In order to assure proper sealing of the cable feedthrough only cables with a minimum and
maximum diameter of 6-12 mm / 0.24-0.47 inch.
.book Page 33 Wednesday, April 30, 2014 1:39 PM