The Terminal Box (terminal processor) is the control terminal of the product. Digital Linear Heat Detector provides a very-early alarm detecting function to the protected environment, The detector can be known as an intelligent "switch" type detector. EOL Box for NMS1001, NMS1001-CR/OD and NMS1001-EP digital Linear Heat. The SR-502 Series Junction Box Sealed Strain Relief Connector is used when the Protectowire Linear Heat Detector enters or exits the junction box. With its user-friendly design, the UCB ensures quick and easy installation, while offering reliable performance in even the toughest environments. All bends in minimum radius of 2. When the Test Button is pressed the detection circuit is shorted to.