3U series
3U series PLC
8-axis 200K high-speed pulse positioning on board, CAN bus with 1 master and 32 slaves, Ethernet Modbus-TCP server and client, 32,000-step program capacity.
FX-compatible 1N / 2N / 3U programmable controllers, special-function PLCs and E series expansion modules — models and specifications at a glance.
Compatible with the FX instruction set; program, download and monitor with GX Developer or GX Works2. The 3U supports Ethernet and Modbus-TCP master / slave.
3U series
8-axis 200K high-speed pulse positioning on board, CAN bus with 1 master and 32 slaves, Ethernet Modbus-TCP server and client, 32,000-step program capacity.
2N series
4-axis 100K pulse positioning, 6 channels of 20K high-speed counting with 2 AB-phase encoders, one RS232 plus one RS485 supporting Modbus master / slave, optional 220V supply with 24V/1A output.
1N series
For cost-sensitive small machines: 8,000-step capacity while keeping high-speed counting and pulse positioning — a drop-in replacement for existing FX1N CPUs.
| Model | I/O | Analog | Ports | Dimensions | Notes |
|---|---|---|---|---|---|
| 3U18MTR2AD1DA | 8 / 10 | 2AD · 1DA | RS232 + RS485×2 | 120×80×65 | 8 transistor + 2 relay |
| 3U18MTRE2AD1DA | 8 / 10 | 2AD · 1DA | RS232 + RS485×2 + Ethernet | 120×80×65 | 8 transistor + 2 relay |
| 3U18MR2AD1DA | 8 / 10 | 2AD · 1DA | RS232 + RS485×2 | 120×80×65 | 10 relays |
| 3U18MRE2AD1DA | 8 / 10 | 2AD · 1DA | RS232 + RS485×2 + Ethernet | 120×80×65 | 10 relays |
| 3U-32MR | 16 / 16 | — | RS232 + RS232/485 + RS485 + CAN | 140×80×65 | Relay output |
| 3U-32MRE | 16 / 16 | — | Same + Ethernet | 140×80×65 | Relay output |
| 3U-32MT | 16 / 16 | — | RS232 + RS232/485 + RS485 + CAN | 140×80×65 | Transistor output |
| 3U-32MTE | 16 / 16 | — | Same + Ethernet | 140×80×65 | Transistor output |
| Model | I/O | Analog | Ports | Dimensions | Notes |
|---|---|---|---|---|---|
| 40MT-4AD1DA | 24 / 16 | 4AD · 1DA | RS232 + RS232/485 + RS485 + CAN | 197×80×65 | AD configurable as NTC temperature input |
| 40MTE-4AD1DA | 24 / 16 | 4AD · 1DA | Same + Ethernet | 197×80×65 | AD configurable as NTC temperature input |
| 40MR-4AD1DA | 24 / 16 | 4AD · 1DA | RS232 + RS232/485 + RS485 + CAN | 197×80×65 | Relay output |
| 40MRE-4AD1DA | 24 / 16 | 4AD · 1DA | Same + Ethernet | 197×80×65 | Relay output |
| 48MT-CAN | 24 / 24 | — | RS232 + RS232/485 + RS485 + CAN | 197×80×65 | — |
| 48MTE-CAN | 24 / 24 | — | Same + Ethernet | 197×80×65 | — |
| 48MT-2AD1DA | 24 / 24 | 2AD · 1DA | RS232 + RS232/485 + RS485 | 197×80×65 | — |
| 48MTE-2AD1DA | 24 / 24 | 2AD · 1DA | Same + Ethernet | 197×80×65 | Photographed model from the selection guide |
| 48MR-2AD1DA | 24 / 24 | 2AD · 1DA | RS232 + RS232/485 + RS485 | 197×80×65 | Relay output |
| 48MRE-2AD1DA | 24 / 24 | 2AD · 1DA | Same + Ethernet | 197×80×65 | Relay output |
| 60MT | 30 / 30 | — | RS232 + RS232/485 + RS485 | 197×80×65 | — |
| Model | I/O | Analog | Ports | Dimensions | Notes |
|---|---|---|---|---|---|
| 3U-16MTRE | 8 / 8 | — | RS232 + RS485×2 + Ethernet | 125×90×40 | Clear housing, 4 transistor + 4 relay |
| 24MT-4AD2DA | 16 / 8 | 2AD + 2NTC · 2DA | RS232 + RS485×2 | 125×90×40 | Clear housing, single-board design |
| 3U-80MRE | 40 / 40 | — | RS232 + RS485×2 + Ethernet | 270×76×48 | Black DIN-rail base, all relay outputs |
| 32MT2AD2DA | 16 / 16 | 2AD · 2DA | RS232 + RS485×2 | 134×72×40 | Pin-header connection saves wiring; green DIN housing available |
| Model | I/O | Analog | Ports | Dimensions | Notes |
|---|---|---|---|---|---|
| 16MR | 8 / 8 | — | RS232 + RS485 | 90×80×65 | Relay output |
| 16MR-2AD | 8 / 8 | 2AD | RS232 + RS485 | 90×80×65 | AD selectable current or voltage |
| 16MT | 8 / 8 | — | RS232 + RS485 | 90×80×65 | Transistor output |
| 16MTR | 8 / 8 | — | RS232 + RS485 | 90×80×65 | 4 transistor + 4 relay |
| 16MTP-2AD | 8 / 8 | 2AD | RS232 + RS485 | 90×80×65 | Outputs with C0 common |
| 32MT | 16 / 16 | — | RS232 + RS485 | 120×80×65 | Two isolated output groups, C0 / C1 commons |
| 32MTP | 16 / 16 | — | RS232 + RS485 | 120×80×65 | Two isolated output groups, C0 / C1 commons |
| 48MT | 24 / 24 | — | RS232 + RS485 | 120×80×65 | Two isolated output groups, C0 / C1 commons |
| 45MT | 29 / 16 | — | RS232 + RS485 | 196×80×65 | Bottom-in, top-out wiring |
| 45MR | 29 / 16 | — | RS232 + RS485 | 196×80×65 | Bottom-in, top-out wiring |
| 60MT | 36 / 24 | — | RS232 + RS485 | 196×80×65 | — |
| 22MR | 14 / 18 | — | RS232 + RS485 | 125×80×65 | Clear housing, low cost |
| 26MR | 12 / 14 | 4 channels | RS232 + RS485 + CAN | 165×75×65 | 10A relays; with a CT board, senses three-phase current up to 50A |
| Model | I/O | Analog | Ports | Dimensions | Notes |
|---|---|---|---|---|---|
| 26MR-2AD2DA | 14 / 12 | 2AI · 2AO | RS232 + RS232/485 + optional CAN | 137×80×65 | AD with current / voltage selector switch |
| 32MR-2AD2DA | 16 / 16 | 2AI · 2AO | RS232 + RS232/485 | 137×80×65 | AD requires selecting current or voltage |
| 32MR-4AD2DA | 16 / 16 | 4AI · 2AO | RS232 + RS232/485 | 137×80×65 | Relay output |
| 32MT-2AD2DA | 16 / 16 | 2AI · 2AO | RS232 + RS232/485 | 137×80×65 | Transistor output |
| 32MT-4AD2DA | 16 / 16 | 4AI · 2AO | RS232 + RS232/485 | 137×80×65 | Transistor output |
| Model | I/O | Analog | Ports | Dimensions | Notes |
|---|---|---|---|---|---|
| 16MTS | 8 / 8 | — | RS232 | 65×80×45 | Compact, for small machines or I/O communication |
| 14MRS | 8 / 6 | — | RS232 | 65×80×45 | — |
| 16MTP | 8 / 8 | — | RS232 + RS485 | 65×80×45 | — |
| 14MRP | 8 / 6 | — | RS232 + RS485 | 65×80×45 | — |
| 8MR3AD1DA | 4 / 4 | 3AI · 1AO | RS485×2 | 65×80×45 | — |
Dedicated models integrated on a proven PLC platform — no add-on modules or secondary development.
Weighing
Bridge-sensor interface on board, outputting raw AD values; the high-speed version samples 400 times per second with roughly 100,000 counts of resolution. The weighing port also accepts RTDs or thermocouples for high-accuracy temperature measurement. Sample programs included.
Motor
Full-bridge output drives 24V brushed DC motors at 20A PWM, with speed control, forward / reverse, braking, overload and short-circuit protection — suited to packaging machinery and vehicle equipment.
Current sensing
Up to nine current transformers sense AC current up to 50A, with 12 inputs and 10 outputs — easy to build into a motor protector or current monitor.
| Model | I/O | Weighing channels | Ports | Rate & resolution | Notes |
|---|---|---|---|---|---|
| 16MTS-1W | 8 / 8 | 1 channel | RS232 + RS485 | 10 Hz, approx. 40k counts | Compact, low cost |
| 26MTS | 10 / 16 | — | RS232/RS485 + RS485 + CAN | — | Standard, no weighing port |
| 26MTS-1W | 10 / 16 | 1 channel | RS232/RS485 + RS485 + CAN | 10 Hz | — |
| 26MTS-1WH | 10 / 16 | 1 channel | RS232/RS485 + RS485 + CAN | 400 Hz, approx. 100k counts | Resolution after calibration, high-speed weighing |
| 26MTS-2WH | 10 / 16 | 2 channels | RS232/RS485 + RS485 + CAN | 200 Hz, approx. 100k counts | Dual-scale synchronous sampling |
Weighing models output raw AD values only; zeroing and calibration are done in the program, which suits customers already familiar with weighing. Otherwise choose a weighing expansion module.
| Model | I/O | Dedicated channel | Ports | Dimensions | Notes |
|---|---|---|---|---|---|
| 24MT-DCC | 8 / 15 | 1 DC motor | RS232/485 + RS485 + CAN | 196×80×65 | Full bridge, 24V brushed motor, 20A PWM |
| 26MT-2DCC | 10 / 16 | 2 DC motors | RS232/485 + RS485 + CAN | 196×80×65 | 20A PWM, two motors controlled independently |
| 22MT-9CT | 12 / 10 | 9 CT channels | RS422 + RS485×2 | 140×80×45 | Senses AC current up to 50A |
CAN expansion ribbon cable and RS485 port: connects to Sinocon CPUs through the expansion port, or to third-party PLCs and host systems over RS485.
Digital I/O
Input-only, output-only and mixed types; relay or transistor outputs; input polarity jumper-selectable NPN or PNP; up to 15 modules.
Analog
Two lines: 12-bit standard and 24-bit high precision. Inputs must be specified as current or voltage; outputs provide both. E4AD-H supports channel isolation and differential input.
Temperature
Full coverage of thermocouple, RTD and NTC signals, measuring -40 to 1300 °C; selected models support channel-to-channel isolation.
Weighing
24-bit AD with anti-vibration filtering and zero tracking. Standard versions support up to 15 modules and 60 weighing channels; the high-speed version samples 1,600 times per second, suited to dosing and checkweighing.
| Model | Input | Output | Comms | Dimensions | Notes |
|---|---|---|---|---|---|
| E8X | 8 | — | RS485 | 70×80×65 | Input polarity set by jumper (NPN / PNP); read-only over RS485 when connected via the expansion port |
| E8YR | — | 8 | RS485 | 70×80×65 | Relay output |
| E16X | 16 | — | RS485 | 70×80×65 | Input polarity set by jumper (NPN / PNP) |
| E20X | 20 | — | RS485 | 70×80×65 | Input polarity set by jumper (NPN / PNP) |
| E16MR | 8 | 8 | RS485 | 70×80×65 | Relay output |
| E16YR | — | 16 | RS485 | 70×80×65 | Relay output |
| E16YT | — | 16 | RS485 | 70×80×65 | Transistor output |
| E32MR | 16 | 16 | RS485 | 138×80×65 | S/S terminal selects NPN or PNP |
| Model | Input signal | Output signal | Input / output channels | Resolution | Notes |
|---|---|---|---|---|---|
| E4AD2DA | 4-20mA or 0-10V | 0-20mA + 0-10V | 4 / 2 | 12-bit | Only the last module in a chain can use two DA channels; intermediate modules get one |
| E8AD2DA | 4-20mA or 0-10V | 0-20mA + 0-10V | 8 / 2 | 12-bit | Same as above |
| E6DAIV | — | 0-20mA + 0-10V | — / 6 | 12-bit | Up to 3 E6DA modules |
| E4AD-H | ±20mA or ±10V | — | 4 / — | 24-bit | Channel isolation, differential input, 10 or 40 Hz, with data filtering |
| Model | Signal type | Input channels | Measurement range | Comms | Notes |
|---|---|---|---|---|---|
| E4TC | Thermocouple K / E / J | 4 | -40~1300℃ | RS485 | Isolated from internal circuitry; channels not isolated from each other |
| E8TC | Thermocouple K / E / J | 8 | -40~1300℃ | RS485 | Isolated from internal circuitry; channels not isolated from each other |
| E4PT | RTD PT100 (two-wire) | 4 | -40~400℃ | RS485 | Isolated from internal circuitry; channels isolated |
| E8NTC | NTC thermistor (B=3950) | 8 | -40~120℃ | RS485 | Not isolated from internal circuitry |
| Model | Channels | Sampling rate | Comms | Dimensions | Notes |
|---|---|---|---|---|---|
| E1WM | 1 | 10 Hz | RS485 | 70×80×65 | Standard weighing, strong filtering |
| E2WM | 2 | 10 or 40 Hz | RS485 | 70×80×65 | Force measurement, silo weight |
| E4WM(S) | 4 | 10 or 40 Hz | RS485 | 70×80×65 | E4WM: up to 4 modules / 16 channels; E4WS: up to 15 modules / 60 channels |
| E1WH | 1 | 1,600 Hz | RS485 | 70×80×65 | High-speed weighing for packaging machinery and checkweighers |
| E2WH | 2 | 200 Hz | RS485 | 70×80×65 | High-speed dual channel: fast, accurate, stable |
| Model | Output channels | Adjustment range | Comms | Dimensions | Notes |
|---|---|---|---|---|---|
| E2S | 2 | 0-1000 | RS485 | 70×80×65 | Magnet vibration intensity controlled by AC conduction angle, for 220V bowl feeders |
| E4S | 4 | 0-1000 | RS485 | 70×80×65 | Same as above; up to 4 modules |
E series common features: baud rate 9600–115200 and station ID set by configuration software, MODBUS-RTU protocol; up to 15 modules when connected through the expansion port.
Relay and transistor modules that sit independent of the PLC, for output expansion or isolated driving.
Relay
Outputs are isolated dry contacts rated 5A / 8A / 16A, in 4, 8 or 12 channels; coils accept 12V or 24V.
Transistor
NPN and PNP output types with flyback diodes, output current up to 5A; bi-directional optocoupler input accepts NPN or PNP, 12V or 24V.
| Model | Channels | Contact form | Rated current | Notes |
|---|---|---|---|---|
| REL-825 | 8 | 2NO + 2NC | 5A | Isolated dry contact, 12V / 24V coil |
| REL-818 | 8 | 1NO + 1NC | 8A | Isolated dry contact, 12V / 24V coil |
| REL-815 | 8 | 1NO | 16A | High-current load driving |
| Model | Inputs | Outputs | Output current | Output type | Dimensions |
|---|---|---|---|---|---|
| MOS-8 | 8 | 8 | 3A | NPN | 65×80×45 |
| MOS-8P | 8 | 8 | 3A | PNP | 65×80×45 |
Specialised variants of a proven PLC platform, or fully custom control boards and machine control solutions built around your process.
All-in-one
A 7-inch MCGS HMI paired with a reworked FX1N PLC board: 12 inputs, 14 transistor outputs, 4 analog inputs and 2 analog outputs, one RS232 and one RS485 — saving cabinet space.
Bus module
Two weighing channels, two vibratory feeder controls and two 5V DC motor forward / reverse outputs, controlled over CAN or RS485 with address DIP switches — designed for weighing and packaging machinery.
Custom
Control boards and dedicated controllers built to your process, with proven designs to reference: burner control board, tea packaging machine controller, matrix board, magnetic powder clutch power supply.
| Our | Specifications | Dimensions |
|---|---|---|
| HMI all-in-one unit | 7-inch MCGS HMI + reworked FX1N PLC board; 12 in / 14 transistor out; 4AI (0-10V / 0-20mA) + 2AO (0-10V); 1×RS232 + 1×RS485 | — |
| E2W2S bus module | Two weighing + two bowl feeder + two 5V DC motor forward / reverse channels; CAN or RS485 control with address DIP switches | 95×80×45 |
| Tea packaging machine controller | Full-sequence control of dual-head vibratory feeding, two weighing channels, discharging, bag pick-up, opening, shaping, sealing and bag ejection, with HMI parameter setting. | — |
| Burner control board | Two temperature setpoints and displays, ignition control, gas valve control and flame detection; for gas ovens and furnaces. | — |
| Magnetic powder clutch power supply | Input 0-10V or RS485, output 0-24V at up to 5A; the output tracks the input linearly with display, plus overload and short-circuit protection. | 65×90×45 |
| Matrix board | 8 in / 8 out, expandable to 64 inputs, for PLC input expansion; DC24V supply, NPN and PNP versions. | 195×80×45 |
| DC motor controller | Controls forward / reverse, speed and braking of 500W DC motors, with current display, parameter setting, overload and short-circuit protection. | 135×80×45 |
| Isolated communication converter | RS232 to RS485, or RS232-RS232 isolation; three-way isolation of input, output and supply, with surge and interference protection and signal reshaping. | 45×80×65 |
| PS30-24 power supply | Input 120-240VAC 50-60Hz, output DC24V-1A; overload and short-circuit protection. | 45×80×65 |
Communication and hardware specifications of the 3U board, differences against the FX series, and the model numbering rules.
| Item | Specification |
|---|---|
| Programming software | GX Developer / GX Works2, compatible with FX1N / FX2N / FX3U |
| Serial ports | COM0 is RS232, COM1 is RS232/RS485, COM2 is RS485; all three support programming, download and monitoring |
| Serial protocols | FX protocol + Modbus + free RS protocol |
| Ethernet | 10M/100M, supports programming, download and monitoring; Modbus-TCP server and client |
| CAN bus | 1 master, 32 slaves; 32 shared registers per station |
| Digital inputs | DC24V, NPN and PNP |
| Digital outputs | Transistor 1A, relay 5A |
| High-speed counting | 6 × 20K, supporting 2 AB-phase encoders |
| High-speed pulse | 200K × 8, for 8-axis positioning |
| Expansion | Up to 15 modules |
| On-board potentiometers | RV0 → D8030, RV1 → D8031, range 0-4095 |
| IP protection | Option 1: set the dedicated password to 12345678 to disable upload — cannot be cracked. Option 2 (custom): the program is erased the moment an upload is attempted. |
| Item | FX1N | FX2N | FX3U |
|---|---|---|---|
| Program capacity | 8,000 steps | 8,000 steps | 32,000 steps |
| Floating point | Runs but cannot be edited | Supported | Supported |
| Positioning instructions | Supported | Runs but cannot be edited | Supported |
| PLSV accel / decel | Not supported | Not supported | Supported (M8338) |
| High-speed comparison | Not supported | Not supported | Supported |
| COM1 baud rate | 9600 / 19200 auto | 2400-115200(D8400) | 2400-115200(D8400) |
| COM2 baud rate | 2400-115200(D8120) | 2400-115200(D8120) | 2400-115200(D8420) |
| Segment | Meaning | Values |
|---|---|---|
| ① | Series | 1N / 2N / 3U / E (expansion) |
| ② | Total I/O points | 16 / 26 / 32 / 40 / 48 / 60 / 80 etc. |
| ③ | Unit type | M: mixed I/O; X: input only; Y: output only |
| ④ | Output type | R: relay; T: transistor |
| ⑤ | Ethernet (optional) | E |
| ⑥ | Analog inputs | 1~6 |
| ⑦ | Analog input type | I: current; V: voltage; TC: thermocouple; NTC: thermistor |
| ⑧ | Analog outputs | 1 / 2 |
| ⑨ | Analog output type | I: current; V: voltage |
Example: 3U-40MTE-4ADI1DAV means 3U series, 40 points, mixed unit, transistor output, with Ethernet, 4 current-type analog inputs and 1 voltage-type analog output. Derivative suffixes exist (e.g. 16MTP, 26MTS, 22MT-9CT, 24MT-DCC) — always refer to the model table when selecting.
PLC manuals, E series expansion module instructions and Modbus protocol documents — 9 PDF files, searchable by file name or model keyword.
We provide the 2024 PLC selection guide, model parameter tables and wiring diagrams, recommend configurations for your application and arrange sample testing.