SE5901 SDK Series

1-Port Ethernet to Serial Industrial Embedded Computer

  • Ideal for IoT and IIoT applications.
  • Wide -40°C~85°C temperature range for Industrial-grade reliability
  • 2 x 10/100Mbps Ethernet port
  • 1 x RS-232/422/485 port – baud rate up to 921.6 Kbps
  • 1 x USB2.0 high speed OTG port
  • Optional 802.3af PoE models can be powered by Ethernet cable
  • ATOP customized Linux SDK environment with reliable APIs
  • Rugged metal housing with wall or DIN-Rail mount support
  • Industrial EMC protection
SE5901 SDK Series
SE5901 SDK Series
SE5901 SDK Series
SE5901 SDK Series
SE5901 SDK Series

Providing connectivity for the Internet of Things
ATOP’s Industrial Embedded Computer is your ideal flexible Gateway to the Internet of Things. It provides Serial and Ethernet connectivity in a reliable and powerful Industrial Grade platform that can unlock your potential. Based on your specific application, it allowing almost any serial device to be connected, providing and retrieving the data you need to and from the cloud, no matter what provider you’re using.


Write your customized application in C language and Run it on its powerful Industrial low-power 800MHz ARM Cortex A8 TI Sitara AM3354 CPU. Make flexible use of your peripherals, no matter storage, Serial, or USB are needed.
SE5901 is available as a SDK/BSP. The SDK development environment reserves the maximum flexibility. Bottom to top editable software
architecture allowed easily to customize or add the IoT applications for different using scenarios. Included Linux kernel source extend the capability of the kernel layer. Changeable WEB pages allowed to easily customize proprietary style. With the SE5901, it will extend your possibility while building your IoT applications.


Rugged and flexible for advanced developments
SE5901 embeds high EMC protection, wide temperature operation, programming and installation flexibility in one device. A dedicated PoE version allows you to power the device through Power over Ethernet (IEEE 802.3af) technology, without the need of a separate space consuming power supply.


SE5901 (SDK) block diagram



The IoT (Internet of Things) or IIoT (Industrial Internet of Things) is a trending topic these days. It’s all about bringing devices, sensors, actuators, data and commands to the cloud, with the ultimate goal to improve the quality of life, the services Smart Cities can offer, saving energy or saving money. This requires two things: to vehiculate the collected data to the cloud in a format that can be recognized and processed and to process, compute and analyze all this amount of data in real time.
It is not a concept far from reality. Imagine you’d like to bridge a Modbus Sensor to the cloud. And you’d like to have the application running on the cloud to be able to process multiple sensors’ data, and to trigger some event in some specific stations along the network.
You may also have the need to override the cloud control and manage the application locally. Any application has its story.


Here at ATOP, we understand these different needs and we are providing you different working models, based on what your needs are.


Use the Standard SDK, programmable embedded computer if:

  • You are familiar with Linux OS
  • You have ANSI C programming skills
  • Your application is strictly time/ performance sensitive
  • Your application has very critical exception handling requirements

Our SDK products provide:

  • Ported, proven and tested peripherals (such as I/Os, Ethernet, Serial, Relays) and integrated drivers
  • ATOP customized Linux Kernel and network protocols
  • Ported, debugged and proven third party applications
  • Utilities and APIs to control the hardware in an easy  and effective way
  • Opened software architecture to create your own system image
  • Linux source code to extend the kernel capability
  • Modifiable WEB contents to customize proprietary WEB style
  • Example of source code


Hardware Specifications 
CPUTexas Instruments Sitara ARM Cortex A8 AM3354 800MHz
Flash64 MB NOR Flash
RAMSDK version: 256 MB DDR2
Real Time Clock (RTC)Yes - with external chip
Console portYes - on-board connector
Reset ButtonYes
Network Interface 
StandardsIEEE 802.3 for 10BaseT
IEEE 802.3u for 100BaseT(X)
Ethernet Ports2x 10/100BASE-TX RJ-45
Power over Ethernet IEEE 802.3af on LAN2 (PoE version only)
Serial Interface 
ConnectorD-Sub9 RS-232/485 software selectable (DB model)
5-Pin 5.08mm Terminal Block
Ports1 port RS-232/422/485 (2 and 4-wire)
Pull-high / Pull-low /Term. resistorsSelectable by DIP switch
Baud Rate50 ~ 921,600bps
Data Bits7, 8
Stop Bits1, 2
Flow ControlNone, Xon/Xoff, RTS/CTS (RS-232 only)
Other interfaces 
USB ports1 x USB A Type (USB 2.0) - High-Speed OTG + power
BootloaderU-boot 2014.07
Linux kernelLinux 3.14.26
Linux toolchainLinux 32 bits toolchain gcc (C/C++ PC cross compiler), glibc
Linux sample codeRS232, RS485, RTC, watchdog, LED, Buzzer, Button, network socket
Input Voltage9~48 VDC
24 VAC
Connector3-Pin 5.08mm Lockable Terminal Block
Power Consumption0.65A @ 9VDC (6 W Max)
Reverse Polarity ProtectionYes
Operating Temperature-40°C~85°C (-40°F~185°F)
Storage Temperature-40°C~85°C (-40°F~185°F)
Ambient Relative Humidity5%~95%, (Non-condensing)
HousingIP30 protection, SPCC metal housing
Dimensions(W x H x D)32 x 110 x 90 mm (1.26 x 4.33 x 3.54 in)
InstallationDIN-Rail or Wall-Mount (optional kit)
Reset ButtonYes
SafetyEN60950-1:2006; EN62368-1
EMC/RadioFCC Part 15, Subpart B, Class A
EN 55032, EN 55024, EN 61000-3-2, EN 61000-3-3, EN 61000-6-2, EN 61000-6-4
RoHS 2Yes
IEC 61000-4-2ESDContact Discharge±8KV4
IEC 61000-4-2ESDAir Discharge±15KV4
IEC 61000-4-3RSRadiated (enclosure)10 V/m3
IEC 61000-4-4EFTAC Power Port±2.0KV3
IEC 61000-4-4EFTDC Power Port±2.0KV3
IEC 61000-4-4EFTSignal Port±2.0KV3
IEC 61000-4-5SurgeAC Power PortLine-to Line±1.0KV3
IEC 61000-4-5SurgeAC Power PortLine-to Earth±2.0KV3
IEC 61000-4-5SurgeDC Power PortLine-to Line±1.0KV3
IEC 61000-4-5SurgeDC Power PortLine-to Earth±2.0KV3
IEC 61000-4-5SurgeSignal PortLine-to Earth±2.0KV3
IEC 61000-4-6CSConducted (enclosure)10 Vrms3
IEC 61000-4-8PFMFEnclosure30 A/m3
IEC 61000-4-11DIPPower Port-A
ShockIEC 60068-2-27
DropIEC 60068-2-32
VibrationIEC 60068-2-6
Warranty5 Years
MTBF21.16 years (MIL-HDBK-217F-based prediction)


SE5901-DBContact Headquarter1-port RS-232/422/485 Ind. Serial Device Server, DB9
SE5901-TBContact Headquarter1-port RS-232/422/485 Ind. Serial Device Server, TB5
SE5901-PoE-DBContact Headquarter1-port RS-232/422/485 Ind. Serial Server, DB9,PoE Pwrd
SE5901-PoE-TBContact Headquarter1-port RS-232/422/485 Ind. Serial Server, TB,PoE Pwrd
UN315-1212 (US-Y)50500151120003GY-Type power adaptor, 100~240VAC input, 1.25A @ 12VDC output, US plug, LV6
UNE315-1212 (EU-Y)50500151120013GY-Type power adaptor, 100~240VAC input, 1.25A @ 12VDC output, EU plug, LV6
ADP-DB9(F)-TB559906231GFemale DB9 to Female 3.81 TB5 Converter
WMK-315-Black70100000000050GBlack Aluminum Wall Mount Kit


Version Name Time Size Download
v1.0 Linux_Driver_x64 2021-03-29 210.16 KB


Version Name Time Size Download
v2.01 SE5901 SDK Firmware 2021-03-26 11.06 MB


Version Name Time Size Download
v0.8 Datasheet EN 2023-11-01 246.92 KB
v0.7 Datasheet EN 2022-11-04 287.84 KB
v0.6 Datasheet EN 2021-03-26 406.6 KB
v0.3 Datasheet EN 2018-08-24 576.18 KB
v0.2 Datasheet EN 2017-11-10 584.24 KB


Version Name Time Size Download
v1.2 SE59XX SDK User Manual 2018-05-02 2.25 MB
v1.1 SE59XX SDK User Manual 2018-02-05 2.41 MB
v0.4 SE59XX SDK User Manual 2019-09-10 2.55 MB
v1.4 SE59XX Node-RED User Manual 2019-04-22 5.72 MB
v0.1 AWS Getting started guide 2021-08-19 907.53 KB
v0.5 SE59XX SDK User Manual 2021-04-13 2.55 MB
v1.2 SE59XX Node-RED User Manual 2018-08-24 5.59 MB

Hardware Installation Guide

Version Name Time Size Download
v1.1 SE5901/MB5901/PG5901 Hardware Installation Guide 2015-07-15 921.06 KB

STP/DXF drawings

Version Name Time Size Download
v1.0 STP File PG-SE-MB5901 2022-07-07 5.2 MB

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