PACSystems RX3i 32-Point Positive/Negative Logic input modules provide 32

positive or negative logic input points in four isolated groups of eight. Each group is

referenced to its own common connection.

5/12VDC (TTL) 32 Point Positive/Negative Logic Input module, IC694MDL654.

shown at left,  provides 32 discrete TTL voltage threshold input points that operate

at levels up to 15V.  A single, regulated +5V supply (current limited to approximately

150mA) is available through the I/O connectors on the front of the module.  This

supply is generated on the module and is isolated from the backplane.  Its power

input comes from the +5V logic supply on the PLC backplane.  By installing jumpers

on the I/O connector, you can choose to power the inputs from this internal supply

instead of powering them with an external user provided supply.