Roger presents some universal Input-Output modules for the TPS which is a pushbutton-programmable mini PLC-system:
1.) A 4-bit opto-isolated digital input-module (2 are cascadable for one 8-bit port)
2.) An 8-bit darlington output-driver module with ULN2803A
3.) A cascadable 4-relays module for connecting to the darlington output-driver module
The relays-modul is available with 5V or 12V mini-relays capable of switching up to 5 amps at up to 250VAC or 30VDC

Download link for schematics, wiring-diagram and PCB-layout → [ Ссылка ]
The original German "TPS" mini-PLC-System: [ Ссылка ]
Explanation by the original developer Burkhard Kainka (sorry, only in German): [ Ссылка ]
Concerning the amps-rating of the relays watch this video: [ Ссылка ]

Modules available in our shop: [ Ссылка ]
Forum: [ Ссылка ]

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