Centralized Control Type A Emergency Sign Luminaires (Explosion-proof Series) are divided into two types: Central Power Supply Centralized Control Type A Emergency Sign Luminaires and Self-contained Power Supply Centralized Control Type A Emergency Sign Luminaires.The explosion-proof series luminaires are made of aluminum alloy and adopt M-BUS communication with low rated power. They feature IP65 ingress protection rating and explosion-proof grade Exd IIC T6 Gb, complying with explosion-proof specifications.