Specifications
Models
OnLogic Helix 521-PLC (low-profile) and Helix 524-PLC (PCIe expandable)
Product Type
Fanless SoftPLC-oriented industrial computer
Platform
OnLogic EdgeLogic
Processor Options — Series 1
Core Ultra 5 125H, Core Ultra 5 135H, Core Ultra 7 165H (Meteor Lake)
Processor Options — Series 2
Core Ultra 5 225H, Core Ultra 7 265H (Arrow Lake)
Core Ultra 5 125H
14 cores / 18 threads (4P + 8E + 2 LP-E) up to 4.5 GHz, 18 MB cache, 28 W base, Intel Arc graphics, 11 TOPS AI Boost NPU
Core Ultra 5 135H
14 cores / 18 threads up to 4.6 GHz, 18 MB cache, 28 W base, Intel Arc graphics, 11 TOPS AI Boost NPU
Core Ultra 7 165H
16 cores / 22 threads (6P + 8E + 2 LP-E) up to 5.0 GHz, 24 MB cache, 28 W base, Intel Arc graphics, 11 TOPS AI Boost NPU
Core Ultra 5 225H
14 cores / 14 threads up to 4.9 GHz, 18 MB cache, 28 W base, Intel Arc 130T GPU, 13 TOPS AI Boost NPU
Core Ultra 7 265H
16 cores / 16 threads up to 5.3 GHz, 24 MB cache, 28 W base, Intel Arc 140T GPU, 13 TOPS AI Boost NPU
Memory
2x DDR5-5600 SO-DIMM slots, up to 96 GB
Graphics
Integrated Intel Arc graphics, with support for up to four displays
PLC Runtime
Pre-integrated CODESYS SoftPLC environment
Cycle Time
Configured for sub-1 ms cycle times with low jitter
Real-Time Isolation
Separates real-time control tasks from the host operating system workloads
Fieldbus Expansion
Helix 524-PLC adds PCIe expansion with an available Hilscher netX fieldbus interface
Expansion Difference
Helix 521-PLC is optimised for low-profile deployments; Helix 524-PLC is the larger unit with PCIe
Target Workloads
Machine control, industrial automation and edge compute alongside the PLC runtime
Overview
The OnLogic Helix 521-PLC and Helix 524-PLC are fanless industrial computers built around Intel Core Ultra processors and shipped with a pre-configured CODESYS environment. They are part of OnLogic's EdgeLogic platform and are aimed at machine control, industrial automation and edge workloads that would otherwise need a separate industrial PC and a dedicated PLC.
The distinguishing feature is the software integration. Rather than asking an integrator to bring their own runtime, OnLogic configures the CODESYS SoftPLC for sub-1 ms cycle times with low jitter and isolates real-time control tasks from the host operating system, so deterministic control and general-purpose edge compute can share the same chassis without contending for the same scheduling budget.
Two form factors cover different I/O needs. The Helix 521-PLC is the low-profile unit for space-constrained panels, while the larger Helix 524-PLC adds PCIe expansion and offers a Hilscher netX fieldbus interface for industrial networking. Both accept Intel Core Ultra Series 1 (Meteor Lake: 125H, 135H, 165H) or Series 2 (Arrow Lake: 225H, 265H) processors, each with an Intel AI Boost NPU rated 11 TOPS on Meteor Lake and 13 TOPS on Arrow Lake, and both provide two DDR5-5600 SO-DIMM slots for up to 96 GB of memory with integrated Arc graphics driving up to four displays.
Key Benefits
Pre-integrated CODESYS SoftPLC tuned for sub-1 ms cycles with low jitter removes a separate PLC from the bill of materials. Real-time tasks isolated from host OS workloads keeps control deterministic while the same box runs edge compute. Choice of Core Ultra Series 1 or Series 2 with an 11–13 TOPS AI Boost NPU scales compute to the application. Up to 96 GB of DDR5-5600 across two SO-DIMM slots supports vision and data-heavy workloads. Helix 524-PLC adds PCIe expansion and an optional Hilscher netX fieldbus interface for industrial networking.
Applications
Machine control and motion applications using CODESYS, industrial automation cells, packaging and material handling lines, edge compute co-located with PLC logic, panel-mount installations with limited depth (Helix 521-PLC) and fieldbus-heavy installations with PCIe add-in needs (Helix 524-PLC).
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