BL20-2AI-PT/NI-2/3 BL20-2AI-U(-10/0...+10VDC) BL20-2AI-U/CC BL20-2AO-I/CC BL20-2AO-U(-10/0...+10VDC) BL20-2DI-120/230VAC-P BL20-2DI-24VDC-P BL20-2DO-120/230VAC-0.5A BL20-2DO-24VDC-0.5A-P BL20-2DO-24VDC-2A-P