PiXtend V2 -L- Hardware Manual
Figure 41: 24 V; 2,5 A DIN rail power supply connected to PiXtend...................................58
Figure 42: GPIO24 configured as output.............................................................................61
Figure 43: Terminal block - Power supply............................................................................68
Figure 44: Principle circuit diagram: Connection of the main supply...................................70
Figure 45: Connection between PiXtend V2 -L- and Raspberry Pi.....................................72
Figure 46: Principle diagram: Connection between Raspberry Pi and PiXtend V2 -L-.......73
Figure 47: Pin header - I²C on 5 V level..............................................................................74
Figure 48: Principle circuit diagram: I²C on 5V level............................................................75
Figure 49: 5V power supply output for the Raspberry Pi 7" touch display..........................76
Figure 50: PiXtend V2 -L- microcontroller............................................................................81
Figure 51: DIP switch: “SPI_EN”..........................................................................................82
Figure 52: ISP 0 Connector - In-System-Programming (ISP) - ATmega324A.....................83
Figure 53: ISP 1 Connector - In-System-Programming (ISP) - ATtiny441..........................83
Figure 54: Principle circuit diagram: reset circuit.................................................................84
Figure 55: Principle circuit diagram: SPI-Enable.................................................................85
Figure 56: Principle circuit diagram: Connection of a programming adapter at ISP 0 -
ATmega324A........................................................................................................................86
Figure 57: Principle circuit diagram: Connection of a programming adapter at ISP 1 -
ATtiny441.............................................................................................................................86
Figure 58: Terminal block - digital inputs.............................................................................88
Figure 59: Principle circuit diagram: Connection of the digital inputs..................................91
Figure 60: Principle circuit diagram: GND connection.........................................................92
Figure 61: Terminal block - digital outputs...........................................................................93
Figure 62: Principle circuit diagram: Connection of the digital outputs................................97
Figure 63: Terminal block relays..........................................................................................98
Figure 64: Principle circuit diagram: Connection of the relay (DC voltage).......................101
Figure 65: Principle circuit diagram: Connection of the relays (alternating voltage).........102
Figure 66: Terminal block - GPIOs.....................................................................................103
Figure 67: Principle circuit diagram: Connection of the PiXtend V2 -L- GPIOs (as inputs)
...........................................................................................................................................105
Figure 68: Principle circuit diagram: Connection of the PiXtend V2 -L- GPIOs (as outputs)
...........................................................................................................................................107
Figure 69: Terminal blocks - analog inputs and outputs....................................................108
Figure 70: Terminal block - analog inputs..........................................................................109
Figure 71: Principle circuit diagram: Connection of the analog voltage inputs..................114
Figure 72: Principle circuit diagram: Connection of the sensor supply..............................115
Figure 73: Principle diagram: GND connection..................................................................115
Figure 74: Principle circuit diagram: Connection of analog current inputs........................119
Figure 75: Terminal block - analog outputs........................................................................121
Figure 76: Principle circuit diagram: Connection of the analog voltage outputs...............123
Figure 77: Jumper for switching between AO and CAN....................................................124
Figure 78: Terminal bock - PWM/RC servo outputs..........................................................125
Figure 79: Principle circuit diagram: Connection of the PWM or servo outputs................127
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