| 摘要 |
A latching relay coupled SSR circuit provides a simple means of achieving a true latching solid-state relay in both two or three input terminal configurations, with two output terminals switched by standard solid-state relay devices. The circuit does not require any additional power sources, and has true indefinite memory retention of the last state the output was in when all power is disconnected. The latching relay coupled SSR circuit can be configured for a "zero-cross" mode of turn-on style to synchronize with the AC waveform powering the load that cannot be done with electromechanical latching relays, in addition to the purely "random" style of load switching. A latching relay is utilized. The isolation of the input side to the output side is provided by the physical separation of the coil and switch, utilizing the magnetic field of the coil to actuate the switch.
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