CHAPTER 4: INTERFACES FRONT PANEL INTERFACEL90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 4-154Figure 4-17: Enhanced front panel4.2.1.2 Standard front panelThe standard front panel consists of LED panels, an RS232 port, keypad, LCD display, control pushbuttons, and optionaluser-programmable pushbuttons.The front panel is hinged to allow easy access to removable modules inside the chassis. There is also a removable dustcover that is to be removed when accessing the keypad. The standard front panel can be horizontal or vertical. Thefollowing figure shows the horizontal front panel.Figure 4-18: Standard horizontal front panelThe following figure shows the vertical front panel for relays ordered with the vertical option.
