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RASPBERRY PLC 21 FLEX

Raspberry Pi PLC for DIN rail with 13 inputs, 8 outputs, two Ethernet ports and two RS-485 ports, running Linux for Python and Node-RED.

Configurable: 2, 4 or 8 GB RAM, plus one CAN, LoRa, 4G or M-Bus board.

I/O
13 inputs (6 analog 0-10 V), 8 outputs (3 analog/PWM)
Comms
2 x Ethernet, 2 x RS-485, Wi-Fi, Bluetooth LE, I2C, SPI
Built in
UPS for safe shutdown, real-time clock
Power
12 to 24 Vdc, DIN rail, IP20
Specifications, documents and projectsPowered by Raspberry Pi
513.76 € 513.76 €

  • # CPU Type #
  • #CPU Type#
  • # Device #
  • # Inputs #
  • # Outputs #
  • Ethernet
  • Communication board 1
  • Communication board 3
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# CPU Type #: Raspberry Pi
# Device #: PLC
# Inputs #: 1-10
# Outputs #: 1-10
Ethernet: Yes
Communication board 3: No Additional Com. Board 3


Raspberry PLC 21: Raspberry Pi PLC with 13 inputs, 8 outputs and dual Ethernet

The Raspberry PLC 21 is an industrial PLC from Industrial Shields built around a Raspberry Pi. It has 21 I/O (13 inputs, 6 of them analog, and 8 outputs, 3 of them analog or PWM), two Ethernet ports, two RS-485 ports, Wi-Fi and Bluetooth LE, plus a UPS that shuts Linux down safely on power loss. It runs Debian 64-bit, so you program it in Python, Node-RED, C/C++ or any Linux tool. It fits edge controllers, data gateways and machines that need more computing than a classic PLC.

You are viewing the FLEX version: choose RAM and add one expansion board.

See CORE Standard configuration, ready to ship

Documents

Datasheets

Certificates

Brochures

Technical specifications

ComputerRaspberry Pi 4, Broadcom BCM2711 quad core 64-bit, 1.8 GHz
RAMCORE: 4 GB. FLEX: 2, 4 or 8 GB
Operating systemDebian Bookworm 64-bit, preinstalled
Inputs13: 6 analog/digital (0-10 V, 12-bit) and 7 digital optoisolated, 5 to 24 Vdc, 2 with interrupt
Outputs8: 3 analog/digital/PWM (0-10 V, 12-bit) and 5 digital optoisolated, 5 to 24 Vdc
Ethernet1 x Gigabit and 1 x 10/100, RJ45
Serial and buses2 x RS-485 half duplex with 120 Ω termination, TTL serial, I2C, SPI
Wireless and USBWi-Fi, Bluetooth LE, 2 x USB 2.0, 2 x USB 3.0
ReliabilityUPS with supercapacitors for safe shutdown, DS3231 real-time clock with battery, external heatsink
Power supply12 to 24 Vdc with polarity protection
Environment0 to 50 °C operating, 10 to 90 % humidity without condensation
Mounting and protectionDIN rail TS35, IP20, inside a cabinet
ExpansionCORE: none. FLEX: one board, CAN, LoRa (EU, US or Asia band), 4G (LTE-M/NB-IoT or LTE Cat 4) or M-Bus master

Projects built with the Raspberry PLC 21

Field-tested examples with code from the PLC Solution Library.

See all projects in the PLC Solution Library

Try it in a live simulator

The Raspberry PLC 21 is one of the controllers in this simulated system.

Solar Field simulator

A 12.5 MWp single-axis tracker plant in 3D: clouds, wind, hail, tracker faults and grid limits.

Open the simulator

Before you choose the Raspberry PLC 21

How much RAM does it have?

The CORE version has 4 GB of RAM. The FLEX version lets you choose 2, 4 or 8 GB.

How do I program it?

It ships with Debian 64-bit. Connect by SSH to 10.10.10.20 (eth0) and use Python, Node-RED, C/C++ or shell scripts. Industrial Shields libraries give direct access to the inputs and outputs.

Does it have relay outputs?

No. Its 8 outputs are 5 optoisolated digital outputs and 3 analog/PWM outputs. If you need relays, look at the Raspberry PLC models with relay outputs, such as the 19R, 38R or 57R.

What happens on a power failure?

The built-in UPS keeps the Raspberry Pi running long enough to shut Linux down cleanly, so the SD card and your data are not corrupted. The real-time clock keeps the time with its own battery.

Can it do CAN, LoRa or 4G?

Not in the CORE version. The FLEX version adds one expansion board: CAN, LoRa, 4G (LTE-M/NB-IoT or LTE Cat 4) or M-Bus master.