ETC ERP2-120V SM Surface-Mount Door Kit For Echo Relay PanelThe ETC ERP2 120V SM is a surface mount door accessory intended for use with a 120 V Echo Relay Panel. For contractors, integrators, and facility teams building or servicing ETC architectural lighting control systems, this component supports panel completion where the specified surface mount door is required. This lighting accessory is suited to installed environments that rely on organized, code conscious panel assembly, including commercial,