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What is the operation diagram for Zelio latching relays RHK .

This Latching relay is equipped by two coils. When the voltage is on first coil A1/A2 it cause closing the contacts. When the voltage is cut from the coil A1/A2 the contacts remains closed, so they also remain closed after resupplying the coil A1/A2. To open the contacts the voltage must be lead to 2nd (unlatching) coil B1/B2 (without any voltage on the A1/A2 coil). 
Functional diagram in the attached file. 
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