The invention discloses a photoelectric coupler high-low temperature test
system, which comprises a high and low temperature
test board, a high and low temperature box, a
control unit and a photoelectric coupler tester; the high and low temperature
test board comprises a decoding circuit, a tested
piece unit and a
signal wire; each tested
piece unit comprises a test socket and a
solid-state
relay;the corresponding output ends of the tested piece units are connected in parallel through
signal wiring and then are electrically connected with the test end of the photoelectric coupler tester through a
signal cable. According to the invention, pin switching of the to-be-tested photoelectric coupler can be achieved in the high-low temperature
test board, the number of cables led out of the high-low temperature box is greatly reduced, the cable
connection time during testing is significantly shortened, the operation convenience is improved, the problems of poor contact, open circuit and the like are avoided, and long-term stable work can be achieved; besides, the signal cable adopts a
coaxial cable with good
alternating current transmission capability, and after
impedance matching designis carried out on the connecting wire,
alternating current parameters of the photoelectric coupler can be tested.