16 DI/16 DO industrial PLC for automation, compatible with Mitsubishi FX3U, featuring Ethernet, RS232/RS485, CAN, analog/RLY support.
Product Overview
The GT3U‑32 is a compact yet powerful industrial control board compatible with Mitsubishi FX3U. It offers 16 digital inputs and outputs, RS232, RS485, CAN bus interfaces, high-speed I/O, analog channels, plus Ethernet connectivity for networking and remote access—ideal for mid‑level automation tasks . The Ethernet port enables MC protocol over TCP/UDP, MODBUS‑RTU bridging, and remote control functions typical to FX3U with the ENET module .
How to Use
- Mount on DIN rail and wire 24 VDC power.
- Connect Ethernet cable to RJ45 port and set IP using GX Configurator‑EN (built‑in or serial) .
- Configure comm settings: choose UDP (port 5000) or TCP (ports 5000/5001+) via FX Configurator‑EN .
- Load/monitor ladder with GX Works2/Developer over serial or Ethernet.
- Exchange data using MC protocol, TO/FROM buffer instructions, remote RUN/STOP, analog I/O, high‑speed counters.
Tips: use “Always wait for OPEN” UDP mode; reboot after config changes .
Frequently Asked Questions
Q1: Is GT3U‑32 pin-compatible with FX3U?
A1: Yes, it’s fully compatible using the same programming commands and GX software .
Q2: How many simultaneous Ethernet connections?
A2: Up to four simultaneous sessions supported by ENET‑ADP .
Q3: Does it support high-speed counters?
A3: Yes, supports high-speed pulse counting (e.g., 100 kHz) via dedicated inputs .
Q4: Can I monitor/control via SCADA/HMI?
A4: Yes—common with GX Works2 and Kepware using MC protocol; UDP recommended for speed .
Q5: Does analog I/O work over Ethernet?
A5: Analog I/O data can be accessed using TO/FROM instructions or MC protocol buffer blocks.
Q6: Need Modbus TCP support?
A6: Some third‑party boards (e.g., FUNTLY) support Modbus TCP, but GT3U uses MC protocol primarily .
Q7: Programming software required?
A7: Requires GX Works2 or GX Developer; FX Configurator‑EN (free with license) for Ethernet setup .
Q8: Any limits on IP subnets?
A8: Supports standard 192.168.x.x addressing and routers; IP must be set manually .
Q9: How safe is remote RUN/STOP?
A9: Use “Always wait for OPEN” to avoid disconnects during STOP; be cautious of safety circuits .
Q10: How many analog channels?
A10: Typically 2 analog inputs and 1 analog output supported, depending on variant .
User Review Summary
Customer reviews of similar FX3U-compatible boards on Amazon show strong satisfaction with compact design, reliability, and Ethernet support. One 5‑star reviewer said “work stable” (FUNTLY FX3U‑M26MT‑E) while some noted limited user documentation. Analog and relay models see praise for MC protocol ease.
Comparison with Competing Products
GT3U‑32 vs Walfront AMX-FX3U‑26MR‑E (~$110): same FX3U compatibility and Ethernet, but Walfront includes relay outputs; GT3U offers transistor outputs and CAN bus .
GT3U‑32 vs Garosa FX3U‑32MT (~$61): Garosa is budget board with 16DI/16DO but lacks Ethernet; GT3U adds networking plus analog and CAN support .
Technical Specifications
- I/O: 16 digital inputs, 16 digital outputs (transistor)
- Comm: RS232, RS485, CAN, Ethernet RJ45 (10/100 Mbps)
- Protocols: MC protocol, TO/FROM, remote RUN/STOP
- Analog: 2 AI, 1 AO (model-dependent)
- High-speed: up to 100 kHz pulse I/O
- Power: 24 VDC, 2–4 W
- Programming: GX Works2/GX Developer; FX Configurator‑EN for Ethernet
- Environmental: 0–50 °C, 10–80 %RH, DIN rail mount
- Simultaneous connections: up to 4 via ENET‑ADP
Brand Info
LOLLETTE (Lingkong/XuePLC) offers FX3U-compatible PLCs with expanded I/O, communication options, and affordable prices. They maintain compatibility with GX software and publish manuals, aiming at small- to mid-size automation projects.
Purchase Recommendations
Lollette：https://www.lollette.com/gt3u-32-plc-industrial-control-board-fx3u-compatible