觸發電路模組由三個鑒別器和一個「與」門電路組成。當有兩塊或以上的探測器同時產生訊號，該電路便會觸發數據收集。

The trigger electronic module consists of 3 discriminators and a coincidence unit which performs a 2-out-of-3 logic gate. Hence either 2 detectors or 3 detectors receiving cosmic ray signal will trigger DAQ.