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> iR 3220 (6831)

Main Features

  • AM3352 ARM Cortex-A8 @ 600MHz
  • 256MB DDR3 / 256MB NAND Flash
  • 1 x SD-Slot / 1 x SIM card slot
  • 3 x LAN (1 Gigabit, 2 Fast Ethernet)
  • 2 x USB 2.0 Host
  • 2 x RS232/422/485
  • 8 x Digital-I/O (4 Input, 4 Output), 1 x I²C
  • 1 x mPCIe-slot (for e.g. 3G/4G-Modem)
  • WLAN 802.11b/g/n optional
  • Low Power, fanless, safe connectors
  • Operating Temperature −20°C - 65°C
  • DIN RAIL mountable
  • BSPs: Debian, OpenWrt, Buildroot, Yocto

Baltos iR 3220 onRISC ARM Industrial PC with Ti Sitara Cortex-A8 Am3352 processor system on Chip SOC


Baltos iR 3220

Quick Link: | Main Features | More Pictures | Overview | Software Specifications | System | Serial Ports | Wireless interface (option) | Power Requirements | Housing and Mounting | Environmental Data | Standards | MTBF (Mean Time Between Failures) | Warranty | Open Source Software | Ordering Information | Options | Packaging | Download |


  More Pictures

Baltos iR 3220 onRISC ARM Industrial PC with Ti Sitara Cortex-A8 Am3352 processor system on Chip SOC  
Click on the thumbnails to enlarge them …

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The OnRISC Baltos iR 3220 is a fanless and DIN-Rail mounting suitable industrial embedded PC with compact dimensions. It is based on an ARM Cortex-A8 with NEON SIMD Coprocessor, with up to 1GHz CPU clock speed. Low power consumption (3W typical), an extended temperature range (−20°C to 65°C), a wide power supply (12 — 50V DC) and an impressive MTBF (10.5 Years at 45°C) are qualities that make it an ideal system for industrial automation.

IoT-Cloud Support

Thanks to it's rich connectivity Baltos devices can be used as IoT Gateways connecting sensors/actuators and arbitrary cloud providers like Amazon's AWS IoT, Microsoft's Azure IoT Hub and others using MQTT protocol directly or via the cloud providers own APIs.
Besides Baltos series can also serve as a controller. Both roles can be easily programmed using either traditional programming languages or Node-RED*, a visual flow-based programming for the Internet of Things.

Easy-to-use starter kits

Baltos embedded systems run several Linux flavored distributions on an ARM core as an operating system. In addition, two pre-packaged bootable SD cards are provided: The Debian GNU/Linux and an upstream OpenWrt image; the latter includes an install-option to the internal flash memory. A VPN router firmware specialized in easy-to-use VPN networking is also available (VPNRouter).

Booting options and BSPs

Baltos iR 3220 can be booted from either NAND flash or SD card. The NAND flash is a robust boot medium capable of withstanding power cuts and vibrations. SD cards have the advantage of providing arbitrarily large storage amounts. Buildroot, Yocto and OpenWrt BSPs provide a small footprint and would fit well into the NAND storage, whereas Debian is best used on the SD card.

Rich connectivity

The system allows extension with broadband GSM/3G/4G-Modems for installation on mobile internet bases. WLAN802.11b/g/n is available as a common option; furthermore, three locations for SMA-antenna sockets are provided. The great variety of interfaces such as LAN, USB, RS232/422/485 serial ports, I²C and Digital I/O enable Baltos iR 3220 to act like a powerful gateway between networks, various industrial devices and field buses. The Baltos series is fully ESD and surge protected, complying with IEC 61000-4-2 (8KV air and 4KV contact).

Secure Remote Access

For the Baltos series there is a software option that uses the viaVPN Cloud system (, which can be remotely accessed and monitored over the Internet. viaVPN provides secure and strongly encrypted access, without the need for any reconfiguration of existing firewalls. In case a customer's firmware/application is accessible via Ethernet or Wifi — as for example via a web interface or Telnet/SSH connection — viaVPN extends the access over internet by a protected VPN tunnel.

  Software Specifications


Latest stable release available as ready-to-run SD card image or can be built/customized via ELBE project (Github)
BSP with Kernel and bootloader patches and basic configuration (Github)
layer-baltos with Kernel and bootloder patches suitable for new projects or integration into already available projects (Github)
Buildroot and Yocto are suitable for installation to NAND Flash


Based on branch DD 'Designated Driver', comes ready-to-use on an SD card. Installation into NAND Flash memory is supported.
To self-create this software the setup procedure is on GitHub.

Remote Access (option)

The daemon to access the viaVPN system provides secure Remote Access over Internet. It supports a Debian-based Installation, and Buildroot as well.

Connect via Internet
viaVPN provides easy access to remotely installed systems. Software installation is quickly done with convenient tools to get access from everywhere.
All communication uses a VPN-tunnel encrypted by SSL/TLS and AES-256.
Firewall friendly, ready for 3G/4G use
viaVPN Cloud Server access uses common web ports. Reconfiguration of firewalls is not required. This enables the use with mobile networks.

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  • Sitara AM3352 ARM Cortex-A8 RISC CPU @ 600MHz
  • 256MB DDR3
  • Real time clock with battery backup

Mass Storage

  • 256MB NAND Flash memory (bootable)
  • SD 2.0 / SDHC SD-card slot (bootable)


  • 1x 1000/100/10 Mbps Gigabit Ethernet
  • 2x 100/10 Mbps on integrated Fast Ethernet Switch

Expansion Slots

  • 1x miniPCIe via USB 2.0 (for GPS, GSM/3G/4G card)
  • SIM card for GSM/3G/4G modems in miniPCIe slot
  • Also for an added CAN Bus, third serial port or WLAN

Serial Peripherals

  • 2x USB 2.0 Host
  • 2x RS232/422/485 high speed
  • 1x Console Port RS232
  • 1x I²C

Digital Input/Output

  • 4x TTL Output signals (64mA sink / 32mA source)
  • 4x TTL Input signals
  • IRQ for input signals
  • Terminal block connector


  • 1x Power, 1x 3G, 1x WLAN, 1x Application
  • LAN: 3x Link and Speed

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  Serial Ports

No. of Ports/Type

2 × RS232/422/485 selected by software or by DIP-switches
Highspeed UART, 64 Byte FIFO (16C750)


DB-9 male


16kV ESD surge protection

Operating Modes

  • RS232
  • RS422 full duplex              (120Ω on/off)
  • RS485 4 wire, full duplex    (120Ω on/off)
  • RS485 2 wire, half duplex   (120Ω on/off)


One DIP switch per port can set operating mode and RS422/485 termination
Software can override the operating mode for each port
No High/Low biasing resistors needed


  • RS422: Tx+/-, Rx+/-, GND
  • RS485 4 wire: Tx+/-, Rx+/-, GND
  • RS485 2 wire: Data+/-, GND

RS485 Data Direction control

Driver Automatic via RTS

Data bits

5, 6, 7, 8

Stop bits

1, 2


None, Even, Odd, Mark, Space

Flow Control



RS232: 200 bps to 921.6/1000 kbps
RS422/485: 200 bps to 3.7Mbps
Supports non-standard baudrates

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  Wireless interface (option)


2.4GHz Radio, supports IEEE Std. 802.11b/g/n

WLAN Modes

Access Point (AP) or Client (Station)

TX Power

Typ. 15.5dBm ±1.5 dBm @ 1Mbps (DSSS)
Typ. 15.5dBm ±1.5 dBm @ 11Mbps (OFDM)
Typ. 15.6dBm ±1.5 dBm @ 6Mbps (CCK)
Typ. 13.5dBm ±1.5 dBm @ 54Mbps (OFDM)
Typ. 13.4dBm ±1.5 dBm @ 6.5Mbps (OFDM)
Typ. 13.3dBm ±1.5 dBm @ 150 Mbps(OFDM)

RX Sensitivity

-95.6dBm @ 1Mbps, -88dBm @ 11Mbps
-91.3dBm @ 6Mbps, -74.2dBm @ 54 Mbps
-88.8dBm @ 6.5Mbps (20 MHz), -72dBm @ 72.2Mbps (20 MHz)

Transmission Rate

802.11b: 11Mbps
802.11g: 6 to 54Mbps
802.11n: 6.5 to 150Mbps

Transmission Distance

Up to 100m in open areas

Wireless security

  • WEP
  • WPA
  • WPA2
  • WPA2-Enterprise (IEEE 802.1X/RADIUS)

Antenna Connector

RP (Reverse-Polarity) SMA

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  Power Requirements

Input Voltage

12 — 50V DC

Power Consumption

  • 0.2A @ 12V minimal
  • 0.4A @ 12V typical, plus devices on USB and Aux. Power


3-pin Terminal Block

Aux.Power Output

on Digital I/O connector: 0.5A @ 5V max.

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  Housing and Mounting


0.8mm sheet metal


w/o box 0.55kg; w/h box 0.9kg


154×104×50 mm³ (W×L×H)


185×152×60 mm³


  • DIN Rail
  • Wall mount

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  Environmental Data

Operating Temp

−20°C — 65°C

Storage Temp

−30°C - 85°C

Ambient Humidity

10-85% non-condensing

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  • EN 55022 Class B
  • EN 61000-3-2: Limits of harmonic current emissions
  • EN 61000-3-3: Limitation of voltage changes
  • 47 CFR FCC Part 15 Subpart B

EMS (EN 55024)

  • EN 61000-4-3: Radiated RFI
  • EN 61000-4-4: Electrical Fast Transient
  • EN 61000-4-5: Surge
  • EN 61000-4-6: Induced RFI
  • EN 61000-4-8: Power Frequency Magnetic Field
  • EN 61000-4-11: Power supply dips


EN 61000-4-2 4kV contact 8kV air for

  • Serial Ports
  • USB
  • Ethernet
  • DC Power connector
  • Digital-I/O

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  MTBF (Mean Time Between Failures)


27.2 Years @ 25°C
10.6 Years @ 45°C


Telcordia (Bellcore) Standard; RelCalc. 5.0 BELL-7

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Warranty Period

2 years

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  Open Source Software


This product uses open source software to fulfill part of its functions. Licenses for the open source software are granted under the GNU General Public License in various versions. For details about those see the information in the firmware download and

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  Ordering Information


OnRISC Baltos iR 3220

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Power adapter 110-230V AC to 12V @1A, DC, EU plug


Power adapter 110-230V AC to 12V @1A, DC, US plug


WLAN Kit internal
internal module 802.11b/g/n, pigtail and antenna
Purchase time option, not for later retrofitting


GSM/UMTS mPCIe card for 3G modem


4G-Modem LTE for mPCIe incl. IPEX cable & SMA Antenna


DIO Extender
Addon board to use Industrial Voltages 0 30V for Digital-I/O


PCI Express Mini Card for second CAN Bus port


PCI Express Mini Card for a third serial port


Daemon viaVPN, provides secure Remote Access system over Internet


Starter Kit Debian

  • 4GB SD card for DEBIAN/GNU Linux
  • Power adapter 12V @ 1A
  • Adapter cable for console port


Starter Kit OpenWRT

  • 4GB SD card for OpenWRT
  • Power adapter 12V @ 1A
  • Adapter cable for console port

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Packing list

  • OnRISC Baltos iR 3220 system
  • Printed Quick Installation Guide
  • Terminal blocks for Power Supply, Digital-I/O
  • DIN Rail Adapter 24mm
  • Wall mounting plates

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 (Edition: September 2015)
 (Edition: July 2021)
 (Edition: May 2022)
 (Edition: August 2017)
 (September 2020)
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* Specifications are subject to change without notice.
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