NC (default): No power output.
+5V: Output 5V.
+12V: Output 12V. Choose according to the voltage requirements of the external relay or optocoupler, and ensure that the total current does not exceed the capacity of the motherboard.
3.5 SMBus/I2C power supply selection (JPW2, JPW3)
JPW2 controls the power supply of SMBus (CN2): NC (default),+5V,+3.3V.
JPW3 controls the power supply of I2C (CN4): NC (default),+5V,+3.3V.
These buses can be used to connect external sensors or management devices and need to be level matched with peripheral devices.

Key Interface Pin Description
4.1 COM ports (COM1~COM6)
COM1~COM4 are onboard pin arrays (10 pins, pin 10 is Key), only supporting RS232, and the signal includes DCD#、RXD、TXD、DTR#、GND、DSR#、RTS#、CTS#、RI#。
COM5/6 rear DB9, signal definition standard RS232, but can be changed to RS422/485 through jumper wires. In 422/485 mode, some pin functions have changed (such as TX/RX becoming differential pairs), refer to the pin definitions in the JSETCOM5/6 manual.
4.2 GPIO(JDI01)
40 pins, the first 32 pins are DIO1~DIO16 (input) and DIO17~DIO32 (output), 33~38 NC, 39 is GND, and 40 is POWER (powered by JPW1).
The voltage level is TTL 3.3V (high level ≥ 2.0V, low level ≤ 0.8V), which can directly drive common TTL devices. If higher voltage is required, external level conversion is needed.
4.3 Fan connector
CPU_SAN1, CHA_SAN1, and SYS_SAN1 are all 4-pin and support PWM speed regulation, providing a maximum of+12V/1A. A 3-pin fan can also be plugged into a 4-pin socket (without PWM function), but the speed monitoring signal can still be read.
4.4 Front panel interface (F_PANEL1)
Including power LED (+3.3V), hard drive activity LED (low active), power switch (PANSWIN #), reset switch (FP-REET #), all of which are standard definitions.
BIOS Key Settings Detailed Explanation (Based on UEFI)
IMB-M43H uses AMI UEFI BIOS, press Del or F2 to enter. The following focuses on the settings related to industrial applications.
5.1 Main menu and AT/ATX mode display
Main → AT/ATX Mode: Display the current jumper selected mode, read-only.
5.2 CPU Configuration (Advanced → CPU Configuration)
Hyper Threading: Multi threaded applications are enabled and real-time control is recommended to be disabled to improve response certainty.
Active Processor Cores: Some cores can be disabled as needed to reduce power consumption.
Intel SpeedStep and C-states: It is recommended to keep them enabled for energy efficiency, but if they are sensitive to interrupt latency, the depth of C-states can be limited.
Intel Trusted Execution Technology: To be used in conjunction with VT-x and TPM, disabled by default.
5.3 PCH-FW Configuration (Advanced → PCH-FW Configuration)
ME State: default enabled. If ME is turned off, some management functions will be disabled and usually do not need to be changed.
5.4 ACPI Settings (Advanced → ACPI Settings)
S3 Video Repost: When waking up from S3, reinitialize the graphics card. It is recommended to enable it to avoid no display after waking up.
PCIe # Wake from S5, Wake on Ring: Enable remote wake-up as needed.
5.5 Super IO Configuration (NCT6106D)
Configure serial parallel port and watchdog here:
Serial Port 1-6 Configuration: Each COM port can be enabled/disabled separately, and the I/O address and IRQ can be adjusted (Change Settings select Auto or specified).
For COM5/6, it is necessary to enable RS485 Auto Flow in the BIOS at the same time (if the jumper is set to RS485), otherwise RTS needs to be manually controlled.
Parallel Port Configuration: Set LPT mode (SPP/EPP, etc.).
WatchDog Count Mode: can be set to Second or Minute; WatchDog TimeOut Value: 0 means disabled, 1~255 is the timeout value, triggering a system reset after timeout.
Chassis Opened Warning: When enabled, if the chassis is opened, it will prompt when entering BIOS, and clearing it requires entering Setup.
Deep S5 Support: Enabling it can reduce standby power consumption, but some wake-up functions may be limited.
Keyboard&Mouse Support: Does it support keyboard and mouse wake-up in S5 state.
5.6 Hardware Monitoring (NCT6106D HW Monitor)
Display CPU/system temperature, fan speed, core voltage,+12V,+5V, etc. The Smart Fan submenu can be used to configure the speed control mode of the CPU/system fan separately:
Manual Mode: Fixed PWM output value (0~255).
Thermal Cruise Mode: Set target temperature, tolerance range, step time, start/stop value to achieve automatic temperature control and speed regulation.
5.7 S5 RTC Wake Setting (Advanced → S5 RTC Wake Setting)
Wake System From S5: Once enabled, an alarm can be set to automatically turn on the device, making it suitable for unmanned scheduled tasks.
5.8 Serial Port Console redirection
Support BIOS console redirection through COM port, with the ability to set baud rate (up to 115200), data bits, stop bits, flow control, etc., for headless server debugging.
5.9 CSM Configuration (Advanced → CSM Configuration)
CSM Support: If you need to use traditional MBR hard drives or older PCI expansion cards, they should be enabled; If it is in a full UEFI environment, it can be disabled to speed up startup.
Boot Option Filter: Optional UEFI and Legacy, Legacy only, UEFI only.