Description
The Iono Pi board adds several digital and analog input lines, power relay outputs, support for standard interfaces like 1-Wire and Wiegand typical of a modern PLC to the Raspberry Pi.
This add-on board is the the core of our Iono Pi module and Iono Pi Touch Display and can be purchased separately for product evaluation, prototypes developments, or custom embedded designs.
Features
Mounting:
- standard Raspberry Pi 40-pin GPIO header
- power supply and I/O connections on screw terminal block
Power supply:
- 9÷28Vdc power supply, with surge and reverse polarity protection, and 2.2A resettable fuse
- up to 4.0A max current to the 5V Raspberry Pi power supply input pins (at 24Vdc)
Inputs/Outputs:
- 4 x power relay outputs rated for 6A at 250V
- 2 x analog voltage inputs 0÷30V
- 2 x analog voltage inputs 0÷3V on internal pin-headers
- 7 x configurable digital input/output pins, for potential-free or voltage inputs, TLL input/ouptuts and open collector outputs
- 1-Wire and Wiegand support
High reliability and security:
- real time clock (RTC) with replaceable back-up battery
- optional embedded Microchip ATECC608A/B secure element chip
More:
- GPIO-controlled LED
- power-on status LED
Specifications
| Power supply (VS) | 9-28V⎓ (VDC)
Reverse polarity protection with 2.2A resettable fuse. Surge protection up to ±1000V/2ohms 1.2/50μs |
| Current consumption at VS+ 12V⎓
including Raspberry Pi 4, with Ethernet connected, no USB devices |
low CPU load: 320mA,
100% CPU load, before throttling: 590mA 100% CPU load, throttled: 500mA All relays ON add 90mA Actual current consumption may vary based on working conditions |
| Current consumption at VS+ 24V⎓
including Raspberry Pi 4, with Ethernet connected, no USB devices |
low CPU load: 190mA,
100% CPU load, before throttling: 320mA 100% CPU load, throttled: 280mA All relays ON add 50mA Actual current consumption may vary based on working conditions |
| Raspberry platform compatibility | Pi 4 Model B
Pi 3 Model B+ Pi 3 Model B Pi 2 Model B (tested with Pi 4 Model B for regulatory compliance) |
| Voltage range at digital inputs | DI1..DI3: 0÷40V ⎓ in normal mode;
0÷5V ⎓ in TTL mode DI4..DI6: 0÷VS+ ⎓ |
| Current for each digital input in normal mode | DI1..DI3:
DI4..DI6:
|
| Voltage threshold digital inputs in normal mode |
|
| Voltage threshold digital inputs in TTL mode |
|
| Range for analog inputs |
|
| Impedance for analog inputs | AI1..AI4: 200kOhm |
| Analog inputs characteristics |
|
| Maximum recommended cable length for digital inputs |
|
| Maximum recommended cable length for analog inputs 1-2 | 15m |
| Maximum recommended cable length for open collector outputs | 2m |
| Relay outputs rating |
|
| Open collector outputs rating | NPN type, shared with DI4..DI6, common on VSOUT, short circuit protected 100mA MAX output current |
| AUX VSOUT |
|
| AUX 5VOUT |
|
| Real time clock | Internal RTCC circuit with backup lithium battery. Only use CR1025 Lithium / Manganese Dioxide (Li/MnO2) batteries.
Expected battery life without main power supply: ~2 years |
| 15-pin terminal block characteristics | Maximum conductor cross section: 1.5 mm2 (16 AWG), or 0.5 mm2 when using ferrules (highly recommended)
Recommended stripping length: 5 mm Screw thread: M2 Maximum screws tightening torque: 0.25 Nm |
| 8-pin terminal block characteristics | Maximum conductor cross section: 2.5 mm2 (12 AWG)
Recommended stripping length: 7 mm Screw thread: M3 Maximum screws tightening torque: 0.6 Nm |
| Electromagnetic immunity compliance | EN 61000-4-2 (ESD)
EN 61000-4-3 (Radiated RF Field) EN 61000-4-4 (Burst/fast transient) EN 61000-4-5 (Surge) EN 61000-4-6 (Conducted) EN 61000-4-8 (Power frequency magnetic field) |
| Operating temperature | 0…+50 °C |
| Storage temperature | -20…+70 °C |
| Weight | 70 g |