The PAD100-OROI uses one (1) SLC loop address when monitoring one (1) Class B circuit and providing one (1) Form C relay contact. The module mounts on either a 4" square or double gang box. The module is capable of monitoring one (1) Class B circuit. The PAD100- OROI includes one red LED to indicate the module's status. In normal condition, the LED flashes when the device is being polled by the control panel. When the input is activated, the LED will flash at a fast rate.