BL20-16DI-24VDC-P BL20-16DO-24VDC-0.5A-P BL2016S84211 BL20-1AI-I(0/4...20MA) BL20-1AO-I(0/4...20MA) BL20-1RS232 BL20-1RS485/422 BL20-1SSI BL20-2AIH-I BL20-2AI-I(0/4...20MA)