CAUTION Before powering up the device, it is necessary to check the correct connection of the supply voltage and its level. 2. Connect the "device - sensors" communication lines to the sensors and to device inputs. 3. Connect the "device - load" communication lines to the actuators and to outputs of the device. 4. Apply power to the device. 5. Set up the device. 6. Power off the device. 5.3 Pin assignment Screw terminals are located on the back wall of the panel-mounting device or inside the device (wall- mounting). The terminal block contacts assignment is shown in Figure 5.1 . 20