A Mechanical latch with a 2‑ or 3‑wire electronic control module delivers reliable performance and protection from such application abnormalities as line noise, leakage currents from controller outputs, or short repetitive commands burst from faulty controllers. 3‑Wire control is the choice for use with momentary devices allowing operation from multiple locations. 2‑Wire control is the choice for single‑output automatic operation or for operation from single‑pole devices.