G4A-1A-E-24V G4A-1A-E-24V 通信继电器 G4A-1A-E24VDC G4A-1A-E-24VDC G4A1AE5DC G4A-1A-E-5V G4A-1A-E-5V(D) G4A-1A-E5VDC G4A-1A-E-5VDC G4A-1A-E-CA(C)-12VDC