WIKA DELTA-plus Mode D'emploi page 20

6. Commissioning, operation
Safety instructions for installation
EN
The instruments do not provide for incorporated overcurrent protectors!
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In order to prevent the contacts from welding through overload, suitable
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protection systems must be implemented by the operator!
Only connect circuits with the same voltage and type of protection to the
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switch contacts and connecting cables.
Limit the maximum current, using external measures, to a value of ≤ 5 A per
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circuit.
Size the connecting cables for the largest current strength in the circuits.
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Precise wiring schemes can be seen in the following connection diagram. In
addition both the pin assignment and the required power supply are stated on the
product label of the case circumference.
Electrical connection via:
Cable gland and cable
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1st
contact
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Follow the installation and safety instructions within the
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operating instructions.
Install instruments in accordance with the manufacturer's
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instructions and the valid standards and regulations.
2nd contact
Information
For the safety circuit, which will switch off the heating if the
steam generator falls below the minimum flow, only the normally
open contact of the changeover switch should be connected (i.e.
with Δp = 0 open circuit)!
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch
Cable socket or angular connector
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per DIN 43651
2nd contact
1st contact
Cable terminal box