SL-IoT-BOX-6ULL Datasheet and Pinout: Difference between revisions
From SomLabs Wiki
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== RTC battery socket == | == RTC battery socket == | ||
[[File:iot-box-rtc-battery.png|center]] | [[File:iot-box-rtc-battery.png|center]] | ||
The computer board is equipped with a socket for a CR1220 battery (shown in brown in the picture), which functions as a backup power source for the RTC. The battery requires periodic replacement, which necessitates disassembling the computer enclosure. | |||
Revision as of 14:03, 29 September 2025
SL-IoT-BOX-6ULL Datasheet and Pinout
General description
The SL-IoT-BOX-6ULL is a industrial fanless computer. It is compact, energy-efficient computer dedicated for edge and PLC applications.
Powered by the NXP i.MX6ULL processor, it offers versatile connectivity with RS232, RS485, CAN-FD, USB, Ethernet, and optional WiFi/BLE with external antenna. It provides digital and relay I/O, expandable storage via eMMC or MicroSD, as well as development-friendly features like LED indicators, a console port, and RTC with battery backup.
Designed for reliability and flexibility, the SL-IoT-BOX-6ULL industrial fanless computer is an ideal platform for modern IoT and industrial solutions. By integrating OpenPLC software, industrial applications become more scalable, future-ready, and performance-driven.
At the core of the system, the powerful VisionSOM-6ULL module drives the performance of the computer.
The SL-IoT-BOX industrial fanless edge computer comes in a durable aluminum enclosure, rated IP40 for reliable protection.
Applications
- IoT Sensor Hubs
- Home Appliances
- IoT gateways
- Protocol converters
- Home Automation – Smart Home
- 2D barcode scanners and printers
- Smart grid infrastructure
- Outdoor equipment
Features
- Powered by industrial NXP i.MX 6ULL application processor
- Fanless design
- Core clock up to 900MHz
- Up to 1GB RAM DDR3L
- Up to 32GB eMMC
- Integrated Ethernet 10/100 Mb/s
- Integrated industrial 1xRS485, 1xCAN-FD, 2xRS232 and 4xUSB2.0
- Dual relay NC-C-NO outputs
- Digital inputs 4xIEC 61131-2
- Digital high-side outputs
- Integrated RTC with battery
- Integrated MicroSD card reader
- Optional Murata 802.11b/g/n Wi-Fi and Bluetooth v5.1 module
- Power-efficient and cost-optimized solution
- Integrated security features
- Alu case with IP40 protection
Pictures of SL-IoT-BOX-6ULL versions
| Version | Photo |
|---|---|
| With case |
|
| Exploded view |
 |
Ordering info
| SL | Product type SL-IOT-BOX - Industrial Single Board Computer |
| CpuType | CPU Type 6ULL - i.MX6 ULL Y2 |
| RamSize | DDR3 RAM Size 512R - 512MB |
| FlashSize | Flash Size Type and Density 08GE - 8GB eMMC |
| SF | Special Features 0SF - No Special Features 1WB - Built-in Murata 802.11b/g/n Wi-Fi/Bluetooth v5.1 |
| TEMP | Operating Temperature E - Extended: -25 to +70 C I - Industrial: -40 to +85 C |
Operating ranges
| Parameter | Value | Unit | Comment |
|---|---|---|---|
| Power Supply | - | ||
| Power Supply (USB)1 | Connected to USB console connectors | ||
| DI input H voltage (above) | In accordance with the standard IEC61131-2 | ||
| DI input L voltage (below) | In accordance with the standard IEC61131-2 | ||
| DO output current limit | Recommended max. output current up to 100 mA | ||
| Environment temperature2 | oC | Industrial range w/o WiFi module | |
| Industrial (extended) range with WiFi module |
Note:
1. Recommended only for services purposes
2. Maximum MPU junction temperature is +105oC (industrial version).
Electrical parameters
| Parameter | Value | Units | ||
|---|---|---|---|---|
| Min. | Typ. | Max. | ||
| Computer supply voltage1 | 102 | 24 | 24.5 | V |
| DI and DQ supply voltage1 | 102 | 24 | 24.5 | V |
| Current drawn from the power supply3 @24VDC | 40 | 50 | 85 | mA |
| Maximum relay contacts current 4 up to 250 VAC | - | - | 6 | A |
| Maximum relay contacts current 4 up to 30 VDC | - | - | 6 | A |
| Maximum DQx output current (for channel) | - | - | 1005 | mA |
| Lithium battery for internal RTC6 | - | 3 | - | V |
Notes:
1. Voltage on pin L+.
2. The computer works correctly in the entire range of supply voltages, only the sensitivity range of the DI inputs may change.
3. Excluding external devices connected to the computer (like pendrives, USB modems etc.).
4. Resistive load.
5. The internal current limiter switches on at a load of 1.9A.
6. Lithium CR1220 type.
Communication interface parameters
| Parameter | Value | Units | ||
|---|---|---|---|---|
| Min. | Typ. | Max. | ||
| RS485 transmission speed | - | - | 500 | kb/s |
| RS232 transmission speed | - | - | 235 | kb/s |
| CAN transmission speed | - | - | 8 | Mb/s |
| Default Linux console speed (8n1) | - | - | 115 | kb/s |
| Maximum relay contacts current 4 up to 30 VDC | - | - | 6 | A |
| Maximum DQx output current (for channel) | - | - | 1005 | mA |
Notes:
1. Voltage on pin L+.
2. The computer works correctly in the entire range of supply voltages, only the sensitivity range of the DI inputs may change.
3. Excluding external devices connected to the computer (like pendrives, USB modems etc.).
4. Resistive load.
5. The internal current limiter switches on at a load of 1.9A.
MPU subsystem
The SL-IoT-BOX computer’s microprocessor system is based on a VisionSOM-6ULL family module, which is equipped with an industrial NXP i.MX6ULL microprocessor. Two variants of Linux operating systems are available for the computer, based on Debian and Yocto.
Front connectors
| Connector name | Function | Note | ||
|---|---|---|---|---|
| Power Supply (PWR) | ||||
| M | External power ground (GND) | - | ||
| L+ | External power supply +24VDC | Recommended voltage value 24 VDC | ||
| Relay outputs (REL1, REL2) | ||||
| REL1 NC | Normal connect contact of output relay (HF41F family) | - | ||
| REL1 C | Central contact of output relay (HF41F family) | - | ||
| REL1 NO | Normal open contact of output relay (HF41F family) | - | ||
| REL2 NC | Normal connect contact of output relay (HF41F family) | - | ||
| REL2 C | Central contact of output relay (HF41F family) | - | ||
| REL2 NO | Normal open contact of output relay (HF41F family) | - | ||
| Digital outputs (DQ) | ||||
| L+ | External power supply +24VDC | Recommended voltage value 24 VDC | ||
| DQ1 | Digital, high-side outputs | Max. output current 100 mA | ||
| DQ2 | Digital, high-side outputs | Max. output current 100 mA | ||
| DQ3 | Digital, high-side outputs | Max. output current 100 mA | ||
| DQ4 | Digital, high-side outputs | Max. output current 100 mA | ||
| M | External power ground (GND) | - | ||
| Digital inputs (DI) | ||||
| L+ | External power supply +24VDC | Recommended voltage value 24 VDC | ||
| DI1 | Digital inputs | Compatible with IEC 61131-2 type 1 | ||
| DI2 | Digital inputs | Compatible with IEC 61131-2 type 1 | ||
| DI3 | Digital inputs | Compatible with IEC 61131-2 type 1 | ||
| DI4 | Digital inputs | Compatible with IEC 61131-2 type 1 | ||
| M1 | External power ground (GND) | - | ||
| RS485 | ||||
| A1 | A line of RS485 interface | Interface implemented in UART5 of MPU. Fail safe input. | ||
| B1 | B line of RS485 interface | Interface implemented in UART5 of MPU. Fail safe input. | ||
| M | External power ground (GND) | - | ||
| CAN-FD | ||||
| L | L line of CAN interface | Interface implemented in CAN1 of MPU | ||
| H | H line of CAN interface | Interface implemented in CAN1 of MPU | ||
| M | External power ground (GND) | - | ||
| Dual RS232 | ||||
| T1 | TxD line of channel 1 RS232 | Interface implemented in UART4 | ||
| R1 | RxD line of channel 1 RS232 | Interface implemented in UART4 | ||
| M | External power ground (GND) | - | ||
| T2 | TxD line of channel 2 RS232 | Interface implemented in UART8 | ||
| R2 | RxD line of channel 2 RS232 | Interface implemented in UART8 | ||
| M | External power ground (GND) | - | ||
| User LEDs | ||||
| A | User LED A | - | ||
| B | User LED B | - | ||
| C | User LED C | - | ||
| D | User LED D | - | ||
| SYS | By default system heartbeat LED | Can be used by user freely | ||
| PWR | Signals that the supply voltage is turned on | - | ||
Rear connectors
| Graphic Symbol | Default function | Note |
|---|---|---|
 |
Ethernet 10/100Mb/s connector | Ethernet 1 interface connected to ETH1 of MPU |
 |
MicroSD card slot | Connected to USB with protocol converter |
 |
USB 2.0 host connectors x4 | Ports supported by MTT hub USB connected to USB2 of MPU |
 |
MicroUSB console connector | Console is connected to UART1 of MPU |
 |
MicroUSB OTG connector | Used as user USB-OTG or service USB port for eMMC image downloading. Connected to USB1 of MPU. |
 |
WiFi and BLE 2.4GHz antenna | RP-SMA type connector |
| RES | System reset switch | - |
| REC | Recovery mode enable | - |
GPIOs assignments
| Description | MPU peripheral block | Note | ||
|---|---|---|---|---|
| RTC | ||||
| Communication interface | I2C1 on default UART4 | SDA, SCL | ||
| RTC interrupt | GPIO1_IO25 | - | ||
| Console UART | ||||
| Communication interface | UART1 | TxD, RxD | ||
| RS232 | ||||
| Channel RS232-1 | UART4 | TxD, RxD | ||
| Channel RS232-2 | UART8 | TxD, RxD | ||
| RS485 | ||||
| RS485 interface | UART5 | TxD, RxD - communication UART5_CTS - RS485 direction of data transfer | ||
| CAN | ||||
| CAN communication interface | CAN1 | TX -LCD_DATA08, RX - LCD_DATA09 | ||
| CAN control interface | GPIO3_IO10 | LCD_DATA5 | ||
| User LEDs | ||||
| User LED A | GPIO1_IO02 | - | ||
| User LED B | GPIO1_IO09 | - | ||
| User LED C | GPIO1_IO00 | - | ||
| User LED D | GPIO1_IO01 | - | ||
| SYS | GPIO1_IO08 | By default system heartbeat LED | ||
| Relays | ||||
| REL1 | GPIO1_IO15 | JTAG-NRST | ||
| REL2 | GPIO1_IO11 | JTAG-TMS | ||
| Digital inputs | ||||
| DI1 | GPIO3_IO5 | LCD_DATA0 | ||
| DI2 | GPIO3_I11 | LCD_DATA6 | ||
| DI3 | GPIO3_IO4 | LCD_RESET | ||
| DI4 | GPIO3_IO6 | LCD_DATA1 | ||
| Digital outputs | ||||
| DQ1 | GPIO1_IO14 | JTAG-TCK | ||
| DQ2 | GPIO1_IO27 | UART3-CTS | ||
| DQ3 | GPIO1_IO22 | UART2-CTS | ||
| DQ4 | GPIO1_IO12 | JTAG-TDO | ||
| USB-OTG | ||||
| ID (USB1) | GPIO1_IO24 | UART3_TX | ||
RTC battery socket
The computer board is equipped with a socket for a CR1220 battery (shown in brown in the picture), which functions as a backup power source for the RTC. The battery requires periodic replacement, which necessitates disassembling the computer enclosure.
