Description
- UniPi Axon S205 Universal PLC
- CPU: 4x 1.2 GHz / RAM: 1 GB
- Internal memory: 8GB eMMC
- Power: 24V DC
- 16 I/Os and 2 serial lines in a 4 DIN package
- Durable aluminum chassis (IP20 protection)
The UniPi Axon S205 Universal PLC is focused on a higher number of digital inputs and relay outputs. The unit features a single RS485 serial line. The bus can communicate with up to 32 devices with its total length being up to several hundred meters. Includes a single 1-Wire bus, using 2 or 3 conductors for communication with simple sensors. A single bus can communicate with up to 15 sensors with a maximum total length of the bus up to 100 meters. For network communication, a single 1Gbit Ethernet is provided.
Thanks to 8 digital inputs and 8 relay outputs, the S205 can offer an I/O number comparable with larger units while retaining its compact dimensions. Digital inputs (DI) are used for reading 5-40V DC voltage pulses generated by various binary devices such as digital lightning switches, motion sensors, digital measuring devices (energy meters, flow meters, pressure meters) etc. Digital inputs of the S205 model also feature an in-built pulse counter.

Relay outputs (RO) are using AC/DC voltage or current for switching two-state devices such as boilers, water heaters, electric motors or larger external relays. Axon line relays are rated for max. 250V DC/30V AC voltage or max. 5A switchable current. 8GB eMMC onboard memory provides a high degree of reliability during repeated rewrites compared to systems using memory cards. All components are protected by a durable anodized aluminum case providing IP20 protection.

- UniPi Axon S205 controller
- DIN rail holder (35 mm)
- Removable screw connectors
- Pre-installed Mervis software (can be reflashed manually)
- Power source (optional)
- 72 × 90 × 59 mm
- Weight 176 g

- Weight: 176 g
- CPU: 4x 1.2 GHz
- RAM: 1 GB
- Internal memory: 8GB eMMC
- Digital inputs: 8
- Relay outputs: 8
- RS485 interface: 1
- 1-Wire bus: Yes (galvanically isolated)
- Ethernet: 1 Gbit
- USB: 2.0: 2
- Power: 24V DC
- RTC backup: max. 7 days
- Mounting: DIN (35 mm)
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Refund Policy
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
Please review the Return Conditions, Return Exceptions and the process on How to Request a Return Authorization (RA) before initiating a return request.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at RoboItchi's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
- A valid Return Authorization (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
- The RA number is valid for 30 days. The returned item must be received within that period.
- The RA number must be included with the return.
- Products must be returned in unused, unmodified condition (e.g., no scratches, alterations, missing parts, or signs of installation/use) and in their original packaging, suitable for resale.
- Shipping fees are non-refundable. Return shipping costs are the responsibility of the customer, except in cases of a product confirmed defective through RoboItchi's troubleshooting process or of a verified shipping error by RoboItchi.
- Refunds are processed within 7 days after receipt and inspection of the returned item.
- A ¥10,000 cleaning fee may apply to domestic robots returned in used or unclean condition.
- A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RoboItchi's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
- Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
- Consumables — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tires, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
- Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
- Sealed goods (health or hygiene) — Items sealed for health-protection or hygiene reasons (e.g., masks, gloves, odor-absorbing products). Not eligible for return once unsealed.
- Build-it-yourself products and items requiring customer assembly — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
- Digital Goods, Software, and Apps — Final sale only, due to licensing restrictions.
- Clearance Items — Products identified as clearance or final sale, including end-of-life or discontinued items.
- Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
- On-Demand Items — Standard catalogue products not stocked by RoboItchi and ordered specifically to fulfill a customer request.
- Professional & Specialized Equipment — See the Professional & Specialized Equipment Warranty page and Professional & Institutional Buyers (B2B) section in the Terms & Conditions.
How to Request a Return Authorization (RA)
To request a return, submit a support ticket from your account under My Support Tickets to obtain a Return Authorization (RA) number. Returns without an RA number will be refused.
