A
bus type alarm host comprises a host shell, a main board, a heat source
subdivision heat dissipation mechanism, a network port, an
alternating current interface, a
transformer, a standby battery and a floating type main board support, the main board is connected with the host shell through the floating type main board support, and the heat source
subdivision heat dissipation mechanism, the network port, the
alternating current interface, the
transformer and the standby battery are connected with the interior of the host shell. The network port is connected with the mainboard, the
transformer and the standby battery are connected with the interior of the heat source
subdivision heat dissipation mechanism, the transformer is connected with the mainboard through a power line, and the standby battery is connected with the mainboard through a power line. Compared with the prior art, the heat source subdivision heat dissipation mechanism is additionally arranged, the transformer and the standby battery are independently packaged in the
metal isolation cabin, heat is led out through shell heat dissipation fins, the heat dissipation effect is good, the service life of the battery is prolonged, a
metal shielding net is arranged outside,
electromagnetic shielding is formed, meanwhile, the battery cabin is additionally provided with a sliding rail and a buckle structure, and the heat dissipation effect is good. And the battery is convenient to disassemble and replace.