The invention discloses a contact feedback type
relay control system and relates to the electronic and electrical field. The
control system comprises a
single chip microcomputer, a plurality of
relay driving circuits and a plurality of
relay control circuits, wherein the
single chip microcomputer outputs a plurality of channels of control signals and are connected with
signal input ends of the plurality of relay driving circuits respectively, each of the plurality of relay driving circuits adopts a
Darlington transistor array
chip which comprises an emitting
electrode, a common port, a plurality of
signal input ends and a plurality of driving
signal output ends, driving signal output ends and signal input ends are in the one-to-one correspondence relationship, emitting electrodes are grounded, common ports are connected with a power supply, one end of each of relay control circuits is connected with one driving signal output end of relay driving circuits, the other end of each of relay control circuits is connected with the power supply. According to the contact feedback type relay
control system, the structure of an
input control circuit is changed, so that on the premise that the relay closing is guaranteed, the current of the
control circuit can be reduced, the
voltage at two ends of a relay on the input side can be reduced, and the
power consumption required by controlling of the relay can be reduced.