Expansion I/O UnitsFP03 − 233.4 Pin Layouts3.4.6 E32PE32P X28Y28 Y29X29X20 X21Y21Y20COM COM(−)(+) (+) (−)Input InputOutput Output(−)(−)(+) (+)(* Note 1)X20 X21X22 X23X24 X25X26 X27COM COMX28 X29X2A X2BX2C X2DX2E X2FCOM COMY20 Y21Y22 Y23Y24 Y25Y26 Y27Y28 Y29Y2A Y2BY2C Y2DY2E Y2FNotesThe four COM terminals of input terminals are connectedinternally, however they should be externally connected aswell.The two (+) terminals of output terminals are connectedinternally, however they should be externally connected aswell.The two (−) terminals of the output terminals are internallyconnected, however they should be externally connected aswell.1) Either positive or negative polarity is possible for the inputvoltage supply.The I/O number given above is the I/O number when theexpansion I/O unit is installed as the first expansion unit.The I/O numbers for the expansion I/O units will differdepending on the location where they are installed(*section 5.3).