Hardware
Connection
Section titled “Connection”
Power Supply
Section titled “Power Supply”Input: +7 Vac/Vdc to +40 Vac/Vdc. Phoenix MC1.5/2-G-3.5 connector.
| Pin | Signal | Min | Nominal | Max |
|---|---|---|---|---|
| 1 | +V | 7 V | 12/24 V | 40 V |
| 2 | GND | — | — | — |
Current consumption:
| Device | @ 12 V | @ 24 V |
|---|---|---|
| NXmicro+ | 400 mA | 210 mA |
Micro SD Card
Section titled “Micro SD Card”External storage slot. Supports standard and high-capacity microSD from 32 MB to 32 GB.
RS232 Connection
Section titled “RS232 Connection”Phoenix MC1.5/3-G-3.5 connector. Exposed to Linux as ttymxc4 / COM5.
| Pin | Signal | Description |
|---|---|---|
| 1 | TX | Transmit signal output |
| 2 | RX | Receive signal input |
| 3 | GND | Ground |
CAN Connection
Section titled “CAN Connection”Phoenix MC1.5/3-G-3.5 connector. Exposed to Linux as can0. External 120 Ω termination required if this device is the first or last in the network chain.
| Pin | Signal | Description |
|---|---|---|
| 1 | CAN H | High level CAN bus line |
| 2 | CAN L | Low level CAN bus line |
| 3 | GND | Ground |
RS485 Connection
Section titled “RS485 Connection”Phoenix MC1.5/3-G-3.5 connector. Exposed to Linux as ttymxc1 / COM2. External 120 Ω termination required if this device is the first or last in the network chain.
| Pin | Signal | Description |
|---|---|---|
| 1 | RS485+ | Non-inverting receiver in / driver out |
| 2 | RS485− | Inverting receiver in / driver out |
| 3 | GND | Ground |
Ethernet Connection
Section titled “Ethernet Connection”Both ETH0 and ETH1 use a standard RJ45 8-pin plug.
| Pin | Signal | Description |
|---|---|---|
| 1 | TX+ | Transmit positive |
| 2 | TX− | Transmit negative |
| 3 | RX+ | Receive positive |
| 4–5, 7–8 | NC | Not connected |
| 6 | RX− | Receive negative |
Default IP — ETH0: 192.168.1.100 / 255.255.255.0 / GW 192.168.1.1
Default IP — ETH1: 192.168.2.100 / 255.255.255.0 / GW 192.168.2.1
USB Host
Section titled “USB Host”Standard type-A USB connector. Accepts USB memory sticks and CODESYS license dongle keys.
USB OTG (Device)
Section titled “USB OTG (Device)”High-performance USB On-The-Go (up to 480 Mbps) used in device mode only. The RNDIS Ethernet Gadget driver provides a P2P Ethernet connection on usb0.
Default IP — usb0: 10.10.1.100 / 255.0.0.0
Front LED
Section titled “Front LED”| Color | Meaning |
|---|---|
| Blue | Booting OS |
| Orange | CODESYS application STOP or not loaded |
| Green | CODESYS application RUN |
| Red | CODESYS application EXCEPTION |
| Off | No power |
The NXmicro+ includes a FRAM (Ferroelectric RAM) component (256 Kbit) for non-volatile variable storage, connected to the CPU via I2C. A dedicated CODESYS library (I2C_Drv) allows reading and writing retain variables from the application.
FRAM Usage Example
Section titled “FRAM Usage Example”1. Define a struct Area_retain:
2. Create a Global Variable List of type Area_retain:
3. Use I2C_ReadData and I2C_WriteData in your POU:
