MITSUBISHI FX0N-485ADP RS-485 Communication Adaptor | MELSEC FX0N Series
Engineering Background
The MITSUBISHI FX0N-485ADP is a dedicated RS-485 communication expansion adaptor engineered for the MELSEC FX0N programmable logic controller platform. Designed to extend the native communication capability of FX0N-series CPUs, this adaptor enables reliable multi-drop serial networking in demanding industrial environments. It is the preferred interface solution for procurement engineers integrating FX0N PLCs into distributed SCADA, HMI, and inverter-control architectures.
Product Positioning
The FX0N-485ADP bridges the gap between compact FX0N controllers and plant-wide RS-485 networks. It connects directly to the FX0N CPU’s expansion port without occupying I/O slots, preserving the controller’s compact footprint while adding full-duplex or half-duplex serial communication. It is widely deployed in OEM machine panels, building automation systems, and process control loops where cost-effective, space-saving networking is critical.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | FX0N-485ADP |
| Manufacturer | MITSUBISHI Electric Corporation |
| Series / Platform | MELSEC FX0N / FX Series |
| Communication Standard | RS-485 (EIA-485) |
| Transmission Mode | Half-duplex / Multi-drop |
| Max. Network Nodes | Up to 32 stations |
| Max. Transmission Distance | 500 m (at 19,200 bps) |
| Baud Rate | 300 / 600 / 1,200 / 2,400 / 4,800 / 9,600 / 19,200 bps |
| Connector Type | Terminal block (screw-type) |
| Compatible CPU | FX0N-14MR, FX0N-24MR, FX0N-40MR, FX0N-60MR and variants |
| Power Supply | Supplied from FX0N CPU (no external power required) |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | -25 °C to +75 °C |
| Relative Humidity | 5% to 95% RH (non-condensing) |
| Vibration Resistance | 10–55 Hz, 0.5 mm amplitude (IEC 60068-2-6) |
| Dimensions (W × H × D) | Approx. 40 × 90 × 27 mm |
| Weight | Approx. 110 g |
| Certifications | CE, UL (refer to current MITSUBISHI datasheet) |
| Country of Origin | Japan |
Proven Application Environments
- HMI / GOT Integration: Direct RS-485 link between FX0N CPU and MITSUBISHI GOT series touch panels using MELSEC protocol.
- Inverter Networks: Multi-drop control of MITSUBISHI FR-series inverters via MODBUS RTU or MELSEC protocol over a single RS-485 bus.
- SCADA / DCS Integration: Slave node connection to supervisory systems (Wonderware, Ignition, InTouch) using RS-485 serial drivers.
- Building Automation: BACnet MS/TP or proprietary serial protocol integration in HVAC and energy management systems.
- OEM Machine Panels: Compact panel designs where space constraints prohibit additional communication modules.
- Multi-PLC Networks: Peer-to-peer or master-slave configurations linking multiple FX0N controllers on a shared RS-485 bus.
Engineering Advantages
- Zero Slot Consumption: Mounts directly on the FX0N CPU expansion connector — no I/O base slots used.
- Bus-Powered Design: Draws power from the FX0N CPU; no separate 24 VDC supply required, simplifying panel wiring.
- Long-Distance Reliability: Supports cable runs up to 500 m, suitable for distributed machine architectures.
- Protocol Flexibility: Compatible with MELSEC FX protocol, MODBUS RTU, and user-defined serial protocols via FX0N RS instruction.
- Compact Form Factor: Minimal footprint preserves the FX0N’s space-saving advantage in tight enclosures.
- Proven Field Reliability: Thousands of units deployed globally across automotive, food & beverage, and infrastructure sectors.
System Architecture & Signal Flow
The FX0N-485ADP connects to the left-side expansion port of the FX0N CPU. The CPU communicates with the adaptor via its internal serial bus; the adaptor converts the signal to RS-485 differential signaling for transmission over a twisted-pair cable. In a typical multi-drop topology, the FX0N acts as the master, polling up to 31 slave devices (inverters, HMIs, remote I/O) sequentially. Termination resistors (typically 110 Ω) should be installed at both ends of the RS-485 bus to suppress signal reflections at baud rates above 9,600 bps.
Typical Wiring: SDA(+) → SDA(+) of slave | SDB(−) → SDB(−) of slave | SG (signal ground) connected at one point to avoid ground loops.
Sourcing & Quality Verification
- OEM Authenticity: All units sourced through verified MITSUBISHI Electric authorized distribution channels or certified secondary-market suppliers with full traceability documentation.
- Inspection Protocol: Each unit undergoes visual inspection, label verification (part number, date code, country of origin), and functional power-on verification prior to shipment.
- Packaging: Shipped in original MITSUBISHI anti-static packaging or equivalent ESD-safe packaging with desiccant.
- Documentation: Certificate of conformity and packing list provided with every order. Datasheet available on request.
- Warranty: 12-month warranty against manufacturing defects from date of shipment.
Procurement Process
- Submit RFQ: Contact [email protected] with your required quantity, delivery timeline, and destination port.
- Quotation: Receive a formal quotation within 1 business day including unit price, lead time, and shipping options (DHL / FedEx / sea freight).
- Order Confirmation: Place order via the Konmask.com checkout or via purchase order (PO) for B2B accounts.
- Quality Check & Dispatch: Units inspected and dispatched within 2–5 business days. Tracking number provided upon shipment.
- After-Sales Support: Technical support available via email or WhatsApp for installation, configuration, and compatibility queries.
Technical FAQ
Q: Is the FX0N-485ADP compatible with FX1N or FX2N CPUs?
A: No. The FX0N-485ADP is designed exclusively for the FX0N CPU expansion port. For FX1N/FX2N, use the FX1N-485-BD or FX2N-485-BD communication board respectively.
Q: Can I use MODBUS RTU with the FX0N-485ADP?
A: Yes. Using the RS instruction in the FX0N ladder program, MODBUS RTU master/slave communication can be implemented over the FX0N-485ADP.
Q: How many FX0N-485ADP units can be connected to one FX0N CPU?
A: Only one FX0N-485ADP can be connected per FX0N CPU, as the FX0N has a single left-side expansion port.
Q: What is the maximum cable length?
A: 500 m at 19,200 bps using shielded twisted-pair cable (e.g., Belden 9841 or equivalent). Longer runs require lower baud rates.
Q: Do you provide the GX Developer or GX Works2 parameter configuration guide?
A: Yes. Contact [email protected] and our technical team will provide the relevant programming manual excerpts.
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