FIELD: electronics.
SUBSTANCE: invention relates to electronics, namely to circuits for checking discrete input modules and discrete output modules. The device contains: a block of protection against excess and reverse polarity of supply voltages and overcurrent, an external voltage source made in the form of an external direct voltage source with variable output voltage, a block for setting the polarity of input voltage of discrete input channels, a block of bipolar direct voltage sources with a light indication of flowing current, a block for stabilizing voltage of discrete output channels with galvanic isolation, a block for setting the polarity of voltage supplied to discrete output channels of the “dry contact” type, N blocks of keys with galvanic isolation, made in the form of bidirectional bipolar keys with galvanic isolation, N blocks of current amplifiers, made in the form of blocks of bidirectional bipolar current amplifiers with a light indication of flowing current.
EFFECT: providing a device for multichannel pickup of both positive and negative control logic signals from N discrete output channels of the “dry contact” type with a light indication of the reception of a logic signal in each channel, with the possibility of switching the polarity of supply voltage of the specified channels, as well as with the possibility of current limitation and regulation of the output voltage level of the logic signal at N outputs of the device at the required level and the output of output logic signals from them of both positive and negative polarity to inputs of passive discrete input channels with the number of channels N.
8 cl, 10 dwg
