1.Real user programmable DDC controller. 2.Full function for HVAC and BAS control. 3.Very ... and use. 1 PDDC3026 GUIDE1.1 PDDC3026 is a Direct Digital Control for HVAC(Heating,Ventilating,and Air Conditioning) and BAS ... than others.1.10 PDDC3026 DDC I/O ports : AI(temperature*4,0-10VDC*4),DI*6,AO*4,DO*8 ... .1.11 PDDC3026 ExtendI/O ports: AI(temperature*4,0-10VDC*4),DI*8,AO*4,DO*8 ...