product technical indicators:
²display: double-sided display
²light source: use high-brightness energy-saving led;
²input voltage variable range: ac 85～265v 50/60hz
²rated power: ≤10w
²sealing grade: ip65
²working temperature: -50℃～＋60℃;
²working humidity: 10%～95%;
²mtbf: 50000 hours;
²mttr: 0.5 hours;
²light attenuation: 10000h does not exceed 10%; 50000h does not exceed 20%
²material: pc panel, aluminum alloy frame;
²pattern: double-sided display, green outline, white background and black pattern.
²emergency time: 120 minutes (with emergency power supply installed)
²the tunnel sign adopts a side-mounted installation method and is installed on the tunnel wall.
²comply with the inspection standard jt/t 817-2011 "general technical requirements and testing methods for highway electromechanical system equipment"