Connecting directly to the back of a Unitronics Vision200, Vision500, Vision1040 or Vision1210 series PLC+HMI, the Unitronics V200-18-E46B snap-in I/O module supports a total combination of 46 analog and digital inputs and outputs; it supports 18 digital inputs (including 2 shaft encoder inputs), 9 analog inputs, 15 relay outputs and 2 high-speed digital outputs.