Intro Summary
Compact FX3U‑compatible PLC with 8 inputs, 6 outputs, multi‑port comms and Ethernet—ideal for industrial automation.
Product Overview
The GT3U‑14 PLC Controller Module is a rugged, FX3U‑compatible industrial control board featuring 8 digital inputs and 6 outputs. It adds versatile communication via RS‑232, dual RS‑485, CAN, and a built‑in Ethernet port. It supports high‑speed I/O and analog expansion, making it a powerful drop‑in alternative for Mitsubishi FX3U systems with modern networking needs
How to Use
- Mount on DIN rail and connect a 24 VDC power supply.
- Wire sensors to the 8 digital input terminals and actuators to the 6 outputs.
- Attach RS‑232/485 or CAN peripherals if needed.
- Plug in Ethernet cable and configure IP via GX‑Developer or GX‑Works 2.
- Load your ladder logic program. Use GX‑Works 2’s “FX Configurator‑EN” to set comms .
- For real‑time SCADA or Kepware integration, choose Ethernet (UDP recommended), RS‑485 Modbus RTU or CAN.
Important: follow Mitsubishi wiring and grounding best practices—use class‑D grounding, proper torque, separation from mains, and terminal covers for safety and reliability lollette.com+2lollette.com+2lollette.com+2.
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Frequently Asked Questions (FAQ)
- Does GT3U‑14 include built‑in Ethernet?
Yes, an onboard Ethernet port supports TCP/UDP communication. - Compatible with Mitsubishi FX3U programs?
Yes, fully compatible with GX‑Developer and GX‑Works 2 logic. - Which Ethernet protocol is best?
UDP via FX‑ENET‑ADP works great with Kepware; TCP also supported. - How many devices on RS‑485/CAN buses?
Bus topology allows multiple peripherals—bus capacity depends on wiring and repeater use. - Can it handle analog I/O?
Yes—with optional analog modules, supports analog input/output. - Is high‑speed counting supported?
Supports high‑speed I/O—typically 100 kHz input, 10 kHz pulse output. - What are wiring torque and grounding specs?
Use 0.5–0.8 N·m torque, separate from power lines and implement class‑D grounding - Can program remain unchanged when adding Ethernet?
Yes, Ethernet module only needs parameter settings—no program rewrite . - How many Ethernet connections simultaneously?
Generally one active connection for FX3U‑ENET‑ADP, may support additional via configuration. - What software configures Ethernet?
Use GX‑Works 2 with FX Configurator‑EN branch to set IP, ports, protocol
User Review Summary
User feedback from platforms like AliExpress and industrial forums praise its robust compatibility and cost-efficiency. Pros include Ethernet integration, high‑speed I/O, and seamless GX‑Works support. Complaints focus on limited on‑device documentation (requires referencing Mitsubishi manuals) and the need for careful wiring to ensure noise immunity.
Comparison with Competing Products
| Feature | GT3U‑14 (This Unit) | Mitsubishi FX3U + FX‑ENET‑ADP | Generic FX3U 14‑I/O Module |
|---|---|---|---|
| Inputs/Outputs | 8 in, 6 out | 14 in/out (modular) | 14 in/out |
| Ethernet Built‑in? | Yes | No, requires added ADP module | No |
| RS‑485/CAN Support | Dual RS‑485 + optional CAN | ADP module adds RS‑485 | Only basic RS‑232/485 |
| Compatibility | Plug‑and‑play with FX3U programming | Native FX | Native FX |
| Price/Value | Lower cost with full feature set | High cost (OEM Mitsubishi) | Low cost, limited features |
Technical Specifications
- Digital I/O: 8 inputs, 6 outputs
- Analog I/O: Optional expansion
- Communication Ports: RS‑232, 2× RS‑485, CAN optional, Ethernet
- Power Supply: 24 VDC
- High‑speed I/O: Input up to 100 kHz, pulse output 10 kHz
- Programming: GX‑Developer, GX‑Works 2
- Physical: DIN‑rail mount, terminal torque 0.5–0.8 N·m
- Grounding: Class‑D grounding required
- Environment: Industrial rated; follow wiring separation guidance .
Brand or Manufacturer Info
Lollette is a Chinese industrial automation provider offering cost‑effective PLC alternatives to Mitsubishi FX series. Their “GT3U” line mimics FX precision and programming compatibility, aiming to provide full OEM features at reduced prices.
Purchase Recommendations
Lollette: https://www.lollette.com/gt3u-14-plc-industrial-control-board-fx3u-compatible