Picking the wrong edge gateway is expensive: undersized, it can't keep up with real-time G-code parsing; oversized, it inflates the budget for a pilot that never needed it. This comparison covers the technical criteria to check before buying, a table of options available in 2026 with real price ranges, and the most common mistakes shops make when purchasing.
TL;DR:
You only need an edge gateway if your controller doesn't natively expose OPC UA/MTConnect, or if local latency is critical. Otherwise, a SaaS connector is often enough.
Compact models (Ewon Flexy, Advantech UNO-2372G) cover most CNC shops under 20 machines, priced between $800 and $1,600 USD.
The purchase price is only part of the budget: setup, wiring, training, and maintenance often add 30 to 50% to the total cost in year one.
Not every machine connection requires dedicated edge hardware. If your controllers already expose OPC UA or MTConnect natively and your shop network is stable, a simple software connector may be enough to send data to a SaaS platform. An edge gateway becomes necessary in three specific cases:
The controller is older and has no standard software interface (RS232 serial, DNC port only).
Cycle-time calculation or micro-stop detection needs to happen locally, with latency under 100 ms.
Network connectivity to the cloud is intermittent and you need local buffering to avoid losing events.
If none of these three cases apply to your shop, start with a SaaS connector before investing in dedicated edge hardware.
Before comparing products, set your minimum requirements:
Physical ports: at least 2 Ethernet ports and RS232/RS485 serial ports for older controllers.
Supported protocols: OPC UA, MQTT, and MTConnect cover most modern CNC controllers (Fanuc, Siemens, Heidenhain).
Processing power: a quad-core processor with 4 to 8 GB of RAM is generally enough to parse G-code in real time on a handful of machines. Beyond 10-15 machines per gateway, plan for more RAM or multiple units.
Environmental rating: IP65 if the enclosure is exposed to chips or cutting fluid; industrial temperature range (typically -20°C to 60°C) for non-climate-controlled shops.
Mounting and power: DIN rail for electrical cabinet integration, 10-36 VDC power input for compatibility with existing shop circuits.
Buffer storage: capacity to locally buffer events during a network outage (24 to 72 hours recommended).
Don't want to shop for edge hardware yourself?
JITbase offers its own Edge Platform with drivers for standard protocols (MTConnect, OPC-UA, Fanuc FOCAS), so you don't have to choose or configure a third-party gateway.
Here are the most common options for a CNC shop, from most affordable to heaviest-duty:
| Product | Segment | Key specs | Indicative price | Best for |
|---|---|---|---|---|
| Ewon Flexy 205 | Compact VPN / IIoT | 4 configurable LAN ports, I/O and serial expansion slots, OPC UA/Modbus/EtherNet-IP, -25°C to 70°C | Around $1,100-1,200 USD | Shops wanting to combine remote access with machine data collection |
| Advantech UNO-2372G | Modular box PC | Celeron/Atom quad-core, 4-8 GB RAM, 2×GbE, 4×COM, fanless, -20°C to 60°C, DIN rail | Around $800-1,600 USD depending on configuration | Local G-code parsing and edge cycle-time calculation |
| Siemens Industrial Edge | Enterprise ecosystem | Centralized multi-site management, catalog of edge applications | Quote-based, significantly higher entry cost | Large shops already running Siemens controllers, multi-site operations |
| HPE Edgeline | Heavy edge compute | High processing power, geared toward industrial vision and embedded AI | Quote-based, premium segment | Advanced use cases (vision-based quality control, multi-cell) |
| Generic compact appliance (industrial mini-PC) | Entry level | 8-16 GB RAM, eMMC storage, DIN mounting, often without native IP65 rating | Around $300-600 USD (confirm with vendor) | Pilot limited to 2-5 machines, tight budget |
For a pilot of 2 to 5 machines, a single compact unit (Ewon Flexy or Advantech UNO-2372G) is usually enough. Enterprise options (Siemens Industrial Edge, HPE Edgeline) only make sense beyond about 30 machines spread across multiple sites.
The listed hardware price only covers part of the real cost. Also plan for:
Initial setup: 1 to 2 weeks for a network technician, including OT/IT segmentation and TLS certificates.
Wiring and physical installation: shielded Ethernet cable, clean power supply, and a small UPS if uptime is critical.
Training: about 2 hours for operators, 1 day for network technicians.
Annual maintenance: firmware updates, certificate renewals, vendor support if applicable.
Over the first year, these additional costs typically represent 30 to 50% of the hardware purchase price. For a complete method to calculate the ROI of a digitalization project, see our guide on how to calculate ROI for production management software.
Track your cycle times without edge hardware to manage
JITbase automatically learns your standard times from your CNC programs, with no separate edge gateway to configure or maintain.
Undersizing CPU/RAM: real-time G-code parsing across several machines at once demands more power than simply reporting machine status/stop events.
Skipping IP65 certification in an environment exposed to chips or cutting fluid, which shortens hardware lifespan.
Buying uncertified hardware for OT/IT network segmentation, which complicates securing the shop later on.
Choosing a single gateway for the whole shop without validating its actual capacity to handle the planned number of machines, which creates a bottleneck beyond 10-15 machines.
Evaluate the ROI of your project
Before investing in hardware, quantify the potential throughput and labor gains for your shop.
Choosing an edge gateway depends first on your existing controllers and your latency requirements, not just your available budget. For a pilot of a few machines, a compact model (Ewon Flexy or Advantech UNO-2372G) covers most needs between $800 and $1,600 USD. Reserve enterprise solutions (Siemens Industrial Edge, HPE Edgeline) for large multi-site shops. In every case, budget 30 to 50% more than the purchase price for setup, wiring, and training in year one.
A single gateway can generally handle 10 to 15 machines, depending on processing power and the number of simultaneous connections required. Beyond that, plan for multiple units split by cell or line to avoid a bottleneck on data parsing.
No. An edge gateway is optimized for collecting, normalizing, and transferring machine data, in a compact, fanless form factor. A standard industrial PC offers more general processing power but isn't always built for continuous fanless operation in a shop environment.
Industrial models like the Ewon Flexy or the Advantech UNO line are built for continuous operation in a shop environment, generally lasting longer than a standard desktop PC. Actual lifespan and warranty terms vary by vendor and model; ask for these specifics, along with spare parts and firmware support availability, before buying.
Yes. If your controllers already expose OPC UA or MTConnect, a SaaS connector may be enough to start a pilot. Adding an edge gateway becomes relevant only if you run into latency limits, older controllers that need connecting, or frequent network outages.