Working voltage：220V±20％，Frequency range：50Hz±5％
Working environment：Temptature-45℃～+75℃，Relative humidity≤95％
Support DL/T645-1997、DL/T645-2007communication protocol
Service life ≥ 10 years
Able to transmit concentrator orders , and return meter’s data
With infrared maintenance interface, can query parameters and power data
Technical Parameters
Data transmission port：3 meter-reading RS-485 ports (oneas maintenance RS-485 port), one carrier communication port, one infrared maintenance port, one switching valueinput port
Clock accuracy ≤ 0.5s/d
Clock battery life ≥ 10 years
Storage capacity：1MB FLASH