Digital input unit, 16 x 24 VDC inputs, screw terminal

Digital input unit, 16 x 24 VDC inputs, screwless clamp terminal

Digital input unit, 32 x 24 VDC inputs, MIL40 connector (not included)

Digital high-speed input unit, 32 x 24 VDC inputs, MIL40 connector (not included)

Digital quick response input unit, 16 x 24 VDC inputs, single shot pulse capture 30 ?s minimum, screw terminal

Expansion I/O interface unit, connects to left hand side of expansion I/O rack, up to 3 expansion racks