Recently, I worked on a project using the Mitsubishi Q series PLC, with the output module being the QY81P. I intended to directly drive the Schneider LC1D09BDC contactor with this module, but encountered some issues. Upon checking, I found that the QY81P has an output load current of 0.1A per point and 2A for the … Read more
Testing of the Contactors Using Multimeter Resistance Mode, The Testing Process is as Follows: ① In normal conditions, measure the resistance of the normally open and normally closed contacts. The image below shows the resistance measurement of the normally open contact of the AC contactor in normal conditions. Since the normally open contact is open … Read more
This depends on the specific model of the PLC. PLCs can be categorized into relay output, transistor output, and thyristor output. Relay-type PLCs can directly control contactors, while transistor and thyristor-type PLCs cannot directly control contactors. The maximum output current of relay-type PLCs is 2A, which can drive AC and DC loads. The allowable load … Read more