[Features] ● The controller can actively supply power to two-wire, three-wire, and four-wire sensors. ● Can receive one/two sets of analog signals. ● Equipped with two-stage alarm function, the first stage warning light and the second stage buzzer. ● Equipped with an alarm reset button. ● Equipped with a 4-20mA re-output function. ● Three sets of dry contact points are available for use by back-end devices. ● Can provide 24VDC to the sensor. [Applicable Places] Gas detectors, temperature alarms, pressure alarms.