The 24Vdc Positive/Negative Logic Input module, IC694MDL645, provides sixteen input points in one group with a common power input terminal. This input module can be wired for either positive logic or negative logic. Input characteristics are compatible with a wide range of input devices, such as pushbuttons, limit switches, and electronic proximity switches. Current passing into an input point results in a logic 1 in the input status table (%I).Field devices can be powered from an external supply. Depending on their requirements, some input devices can be powered from the +24 V OUT and0 V OUT terminals of the module. Sixteen green LEDs indicate the ON/OFF status of points 1 through 16. The blue bands on the label show that MDL645 is a low-voltage module. This module can be installed in any I/O slot in an RX3i system. Module supports insertion into and removal from an RX3i Universal Backplane which is under power.