Voltage testing device of interlocking detection board

The utility model relates to a voltage testing device of an interlocking detection board. The voltage testing device comprises a direct-current power supply, a voltage change-over switch, a frequencygenerator, a 32-bit driving unit and 32 paths of on-off switches, the direct-current power supply outputs 5V electricity to supply power to the interlocking detection board, the direct-current power supply outputs 15V electricity and 17.5 V electricity to the 32-bit driving unit through the voltage change-over switch, and the 32-bit driving unit is connected with the frequency generator and the 32-path on-off switch. And each path of switch of the 32 paths of on-off switches is correspondingly connected with one relay of the interlocking detection plate. By adopting the voltage testing device,32 channels of the interlocking detection plate can be detected through switch switching, and the detection efficiency is high. 本实用新型的一种联锁检测板的电压测试装置，包括：直流电源、电压切换开关、频率发生器、32位驱动单元和32路通断开关；所述直流电源输出5V电向联锁检测板供电，直流电源输出15V电和17.5V电通过