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OnLogic Helix 521 industrial computer, shown at an angle, highlighting its orange and grey fanless chassis, featuring multiple ports for industrial connectivity.
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OnLogic Helix 521 industrial computer, shown at an angle, highlighting its orange and grey fanless chassis, featuring multiple ports for industrial connectivity.Side view of the OnLogic HX521 industrial computer showing multiple ports.Side view of the OnLogic Helix 521Back view of the OnLogic Helix 521 showing multiple connections for displays.
OnLogic Helix 521 industrial computer, shown at an angle, highlighting its orange and grey fanless chassis, featuring multiple ports for industrial connectivity.

Helix 521-PLCFanless Low-Profile SoftPLC Edge Controller

SKU: HX521-PLCFree Shipping on orders over $250 *
Description

The Helix 521-PLC is a fanless, low-profile SoftPLC edge controller pre-configured with CODESYS to deliver deterministic machine control. Powered by Intel® Core™ Ultra processing, it provides a turnkey platform for control logic and edge applications on the factory floor.

Highlights
  • Pre-configured and optimized for CODESYS
  • 4x 2.5 GbE LAN, 4x RS232/422/485 COM, 8x Native Digital In/Out
  • Consolidate workloads with Intel Core Ultra processing enhanced for AI

Configure & Buy


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Motherboard
None Selected
SO-DIMM DDR5 Memory
None Selected
8GB SO-DIMM DDR5 5600 MT/s (-20~95ºC)
16GB SO-DIMM DDR5 5600 MT/s (-20~95ºC)
32GB SO-DIMM DDR5 5600 MT/s (-20~95ºC)
48GB SO-DIMM DDR5 5600 MT/s (0~95ºC)
48GB SO-DIMM DDR5 5600 MT/s (-40~95ºC)
48GB SO-DIMM DDR5 6400 MT/s (-40~95ºC)
Expected 12/10/2026
Primary Storage
None Selected
Additional Storage, Cellular Connectivity, or Hailo AI
None Selected
Cellular Antennas (Requires Cellular Modem)
None Selected
Wi-Fi
None Selected
Optional DIO Module
None Selected
Optional External Fan
None Selected
WIFI Antennas
None Selected
Terminal Block COM or DB9 Break Out Cable
None Selected
None Selected
COM Mating Connector
Dual COM 12 Pinout to Dual DB9 Locking Breakout Cable
Operating System
None Selected
Port Blocking Kit
None Selected
Mounting Hardware
None Selected
Power Supply
None Selected
Warranty
None Selected
Assembly & Validation
None Selected
Hardware Setting
None Selected
Accessories
None Selected

EdgeLogic SoftPLCs: Deterministic control without vendor lock-in

  • Pre-configured and optimized for CODESYS

  • Connect legacy and modern equipment

  • Lower total cost of ownership over time

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Shipping & Returns

OnLogic offers Free Economy Shipping within the United States on all online orders of $250 and above. If your purchase qualifies for Free Economy Shipping, you will see this option available at the time of checkout.

We only offer Free Economy Shipping to orders shipped within the lower 48 states of the US (excludes Hawaii and Alaska). For Canadian and International customers, we have an Economy Shipping option available via USPS on certain products. For smaller components, this can help reduce overall shipping costs.

For European customers, we have a website and store located in the EU at www.onlogic.com/eu/. If there is something you don't see on the European site, please contact info@onlogic.com

Overview

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INTEL CORE ULTRA PERFORMANCE AND DETERMINISTIC CONTROL

The Helix 521-PLC combines Intel Core Ultra processing with a pre-validated software stack from CODESYS for real-time control. Running a pre-tuned Windows operating system, the system handles machine control and dual-channel safety functions purely through software using standard onboard interfaces. Equipped with up to 96 GB of DDR5 memory and PCIe Gen4 M.2 storage, the system supports parallel execution of control logic, machine vision containers, and edge analytics on a single hardware platform. Selected processors also support Intel vPro and Intel Active Management Technology (Intel AMT) for remote out-of-band management.

ENGINEERED FOR INDUSTRIAL ENVIRONMENTS

The Helix 521-PLC features a fanless, low-profile aluminum and steel enclosure measuring 50.8 mm x 177 mm x 225 mm. With mounting options including DIN, Wall, VESA, and VESA In-Line, it fits easily into crowded control cabinets or space-constrained machine panels. Rated for 0 to 50°C operation, the system carries global safety and electromagnetic compatibility certifications including cULus, CE, FCC, and UKCA, alongside medical and maritime compliance testing (IEC 60601-1-2 and EN 60945).

VERSATILE CONNECTIVITY FOR FIELDBUS AND EDGE DATA

Built for complex operational technology environments, the Helix 521-PLC provides extensive onboard I/O for multi-protocol communication utilizing CODESYS, including PROFINET, EtherNet/IP, EtherCAT, Modbus TCP, Fieldbus/PROFIBUS, Modbus RTU, and DeviceNet. The front panel features 4x 2.5 GbE LAN ports powered by Intel I226 controllers, 6x USB 3.2 Gen 2 ports, and 2x Thunderbolt 4 USB-C ports. Bottom panel connectors provide 4x COM (RS-232/422/485) via dual-COM connectors, and 2x DisplayPort 2.1 outputs, while the top panel houses an integrated DIO module, a terminal block power input (12 to 24 VDC), and a 3FF SIM slot for wireless connectivity.

Specifications


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System
Hardware LineIndustrial (Fanless)
Cooling TypeFanless
Processor SocketOnboard (BGA)
Processor GenerationIntel® Core™ Ultra Processor (Series 1) [Meteor Lake]
ProcessorIntel® Core™ Ultra 5 125HIntel® Core™ Ultra 5 135HIntel® Core™ Ultra 7 165H
Processor FamilyIntel Core Ultra Series 1 & 2 (Meteor and Arrow Lake)
Processor FeaturesAMT SupportEmbedded LifecycleIntel vPro®
Processor TDP28
LAN ControllerIntel® I226LMIntel® I226V
Graphics/GPUIntel ARC Graphics
Memory TypeDDR5
Memory Capacity96
Memory Clock Speed5600
Memory ChannelsDual Channel
Display
Number of Displays Supported4
Display Mounting OptionsVESA Mount
Input Output
Front I/O1x Power Button 1x Factory Reset Switch 1x 3.5mm Audio Jack 6x USB 3.2 Gen 2 (Type A) 2x Thunderbolt 4, USB Type C (40 Gb/s) 4x 2.5Gb LAN
Rear I/O4x COM (RS-232/422/485) Optional CAN Optional DIO 2x Display Ports
Onboard I/O1x 4 pin Terminal Block Power 1x 3ff SIM Slot (Mapped to M.2 B-Key) 5x Antenna Mounting Holes [Optional 6 Available] 1x Grounding Lug 1x Remote Switch 2x DisplayPort 2.1 UHBR20 2x Dual COM (RS-232, RS-485, RS-422) 1x Fan Hat Connector
Expansion and Features
Expansion Options3FF-Sim slot (Mapped to the B-Key)1 M.2 2280 M-key (PCIe Gen 4x4)1x M.2 B-Key (PCIe Gen4 x2/USB 2.0, PCIe Gen4 x1/USB3.2 Gen 1)
Storage Options1 M.2 2242/60/80 B-key1 M.2 2242/60/80 M-key
System MonitoringAMT Support
Connectivity4G LTEBluetoothWi-Fi
Expansion Mobile CarriersAT&TVerizon
Mechanical
Dimensions50.8mm x 177 mm x 225mm
Weight2.26
Case MaterialAluminum ExtrusionSteel
Power
Input Voltage Minimum12
Input Voltage Maximum24
Input Voltage TypeDC
Power Input Connector4-pin Terminal Block
Environmental and Safety
Regulatory CertificationsCISPR 32/35 & EN 55032/55035EN 55032EN 60601-1-2 4th ed.EN 60950-1EN 60945 Ed. 4EN 62368-1TAA ComplianceUKCAWEEE
Temperature (Operating Maximum)50
Suitable EnvironmentsDustGeneral OfficeIndustrial
Humidity (Non-Condensing Operating Minimum)5
Humidity (Non-Condensing Operating Maximum)95
Other
Additional FeaturesOnboard TPM 2.0 module4G LTECAN BusDIORemote Management: Intel vProSecure BootHailo AcceleratorAI Inference Accelerator
Compatible SoftwareIgnitionRed HatUbuntu
Included Accessories1x 4 pin Terminal Block Mating Connector
NotesLAN Controllers: 4x I226-V (Core Ultra 5 125H/225H) 3x I226-V, 1x I226-LM (Core Ultra 7 165H/265H/135H) Certification Markings: CE, cULus, FCC, UKCA, VCCI, RCM, RoHS, WEEE Coming soon: BIS, KCC Available Countries (incl Wi-Fi/BT):    Americas:         United States, Canada     Asia:         China, Hong Kong, Japan,    Oceania:       Australia, New Zealand     Europe:         Austria, Belgium, Bulgaria, Croatia,       Czech Republic, Cyprus, Denmark,      Estonia, Finland, France, Germany,       Greece, Hungary, Iceland, Ireland, Italy,       Latvia, Lithuania, Liechtenstein,       Luxembourg, Malta, Norway,         The Netherlands, United Kingdom,        Poland, Portugal, Romania,       Slovakia, Slovenia, Spain, Sweden Coming soon: Saudi Arabia, UAE, India, South Korea* Colocation approved countries ( Wi-Fi/BT + LTE ):     USA, CA, EU, UK, AUS/NZ Available Countries (no Wi-Fi/BT):     Americas:         Mexico, Brazil    Asia:       Singapore Other countries available, please call.

Documentation & Support


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