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Iono Pi Board

Raspberry Pi industrial expansion board with wide-range power supply, RTC, digital and analog inputs, power relays, open collector outputs and TTL I/O lines for 1-wire, Wiegand and other digital protocols

93.0098.00 + tax

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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:

  • 1.7mA at VS+=12V ⎓
  • 3.4mA at VS+=24V ⎓

DI4..DI6:

  • 1.9mA at VS+=12V ⎓
  • 3.9mA at VS+=24V ⎓
Voltage threshold digital inputs in normal mode
  • VIH: 4.2V
  • VIL: 3.4V
Voltage threshold digital inputs in TTL mode
  • VIH: 2.4 V
  • VIL: 0.8 V
Range for analog inputs
  • AI1..AI2: 0÷30V ⎓
  • AI3..AI4: 0÷3V ⎓
Impedance for analog inputs AI1..AI4: 200kOhm
Analog inputs characteristics
  • Resolution: 12 bits
  • Linearity: ±1LSB
  • MAX error: ±2% of full scale
Maximum recommended cable length for digital inputs
  • normal mode: 30m
  • TTL mode: 2m
Maximum recommended cable length for analog inputs 1-2 15m
Maximum recommended cable length for open collector outputs 2m
Relay outputs rating
  • Rated current: 6 A
  • Rated voltage: 250 V AC
  • Rated load (AC1, resistive load): 1500 VA
  • Rated load (AC15, cos φ = 0.5): 250 VA
  • Single phase motor rating (230 V AC): 185 W
  • Breaking capacity (DC1):
    • 3 A at 30 V DC
    • 0.35 A at 110 V DC
    • 0.2 A at 220 V DC
  • Electrical life at rated load AC1: 50000 cycles
  • Mechanical life: 20000000 cycles
  • Operate/release time: 6/4 ms
  • Dielectric strength between open contacts: 1000 V AC
  • Type of insulation between coil and contacts: Basic
  • Dielectric strength between coil and contacts: 4000 V AC
Open collector outputs rating NPN type, shared with DI4..DI6, common on VSOUT, short circuit protected
100mA MAX output current
AUX VSOUT
  • Max allowable current: 300mA
  • Min voltage: Supply voltage – 1V
AUX 5VOUT
  • Max allowable current: 50mA
  • Min voltage: 4.5V
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

Documentation

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