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The CoilKeeper™ Solenoid Supervisory Switch provides real-time monitoring of the solenoid coil's position on the valve stem. If the coil is removed from the valve stem for maintenance, the CoilKeeper™ activates dry contacts that can be wired to a supervisory circuit of the releasing control panel . This function helps avoid unintentional releases during maintenance. With local LED indicators , the CoilKeeper™ CSS displays various states, including when the coil is installed correctly, when it is removed for maintenance, when the releasing circuit is energized, or if the coil is open or shorted
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