Vielleicht für manche Interessant. MegaIO-Industrial Specifications 24VDC Power Supply Four Optically-Isolated 4-20mA Inputs Four 4-20mA Outputs Four 0-10V analog Inputs Four 0-10V analog Outputs Four Optically-Isolated Digital Inputs Four Optically-Isolated Open Drain Outputs Four Optically-Isolated 10A/250V Relays with status LED's Four General Purpose LED's RS485, CAN, 1 Wire communication Real time clock with battery back-up Configurable Interrupts https://www.kickstarter.com/projects/mbeffa/raspberry-pi-mega-io-industrial-expansion-card?ref=user_menu