Channel 0 Clock+ DO14 (J4.24)Channel 0 Clock- DO12 (J4.39)Channel 0 Data+ DO15 (J4.38)Channel 0 Data- DO13 (J4.9)Channel 1 Clock+ DI14 (J4.31)Channel 1 Clock - DI12 (J4.2)Channel 1 Data+ DI15 (J4.1)Channel 1 Data- DI13(J4.17)Ground N/C (J4.41)Part number ordering example: RIO-47122-QUAD-PWM section in the Appendix for more information.Digital InputsDigital inputs 0-15 are opto-isolated inputs with a range of 5-24VDC. There is a 2.2k internal series resistorto INC0 (Input Common Bank 0) for inputs 0-7 and INC1 (Input Common Bank 1) for inputs 8-15. Theseries resistor limits the current through the PS2805 opto-coupler. The INC0 and INC1 can either beconnected to the positive side of a DC power supply or to the Ground side of a DC power supply. When adevice is connected to the digital input, current flowing through the opto-coupler will cause the input to turnon. The logic of the input can be configured using the IQ command.+5V to 24VorGNDToggleSwitch+5V to 24V or GND(needs to be the opposite ofwhat goes into INC0 and INC1)Figure 6: Digital InputsINC jumpersThe INC jumpers can be used when an external power supply is not desired for digital inputs 0-15. Theseinputs can use the internal +5V from the RIO instead. To do this, place a jumper on the pins labeled INC asshown here:OUTCINCWhen using the INC jumpers, the digital inputs must have a reference. This reference comes from the RIOfrom pin 34 (INC0B) for inputs 0-7 and from pin 16 (INC1B) for inputs 8-15.44 Chapter 4 I/O RIO-47xxx
