I have a mechanical latch (contactor) relay (KIB 9806) which will latch closed with a positive pulse on the coil contacts and unlatch with a negative pulse on the coil contact. I have a Mini-BMS HousePower board which will monitor a 300 AH 12 volt bank of Lithium cells. I am trying to marry these two devices. The BMS will output a solid 12 volt signal to a coil when energized and I need to convert that to a pulsed signal. I thought of just using a capacitor between ground and the other coil connection but am worried about some leakage current once the capacitor charges.
If a problem occurs, the circuit board has alarm contact which I could use to trip the device and if the capacitor were charged, then the positive terminal could be shorted to ground and at the same time the 12 volt supply could be opened to the contact with a NC contact, providing a negative pulse on the coil contacts. Once the latched relay trips all power is removed from the circuit and everything turns to rest position. I "think" it might work but sounds like a good candidate for a "relay race."
I would like to hear any and all ideas and don't be afraid to criticize my thoughts.
If a problem occurs, the circuit board has alarm contact which I could use to trip the device and if the capacitor were charged, then the positive terminal could be shorted to ground and at the same time the 12 volt supply could be opened to the contact with a NC contact, providing a negative pulse on the coil contacts. Once the latched relay trips all power is removed from the circuit and everything turns to rest position. I "think" it might work but sounds like a good candidate for a "relay race."
I would like to hear any and all ideas and don't be afraid to criticize my thoughts.