ADLINK MXC-3300/3340 Embedded Industrial Control Computer Hardware Integration and Debugging Manual

3.2 Power consumption reference and heat dissipation

The manual provides measured power consumption (24V power supply):

MXC-3300: idle about 20W, typical (with EIST enabled) about 38.6W, full load about 36.2W (with EIST enabled); S3/S4/S5 standby power is about 9.2W.

MXC-3340: idle about 25W, typical about 42W, full load about 32W (with EIST enabled); Standby power is about 7.7W.

Temperature limit: When using DC input, the operating temperature is -20 ° C~60 ° C; if using an external adapter (not for chassis cooling), the maximum temperature is reduced to 50 ° C. Storage temperature is -40 ° C~85 ° C, humidity is 95% @ 40 ° C, and there is no condensation.

Heat dissipation suggestion: The equipment should adopt passive heat dissipation without fans, and it is necessary to ensure a ventilation gap of at least 50mm around to avoid dust accumulation. If the ambient temperature is close to the upper limit for a long time, additional external fans can be considered to assist in convection.

Definition of key interface pins and signal debugging

4.1 DB9 serial port (COM1/COM2)

The RS-232/422/485 mode can be switched through BIOS (see subsequent chapters). Pin definition:

RS-232 mode: Pin1 DCD#, Pin2 Rx, Pin3 Tx, Pin4 DTR#, Pin5 GND, Pin6 DSR#, Pin7 RTS#, Pin8 CTS#, Pin9 RI#。

RS-422 mode: Pin1 TXD - (485-), Pin2 TXD+(485+), Pin3 RXD+, Pin4 RXD -, Pin5 GND.

RS-485 mode: Pin1 DATA -, Pin2 DATA+, other N/C (actually two wire half duplex).

Engineering reminder: RS-485 requires adding a 120 Ω terminal resistor at both ends (or terminal nodes) to reduce reflection. If the distance is long (>100 meters), it is recommended to use shielded twisted pair cables, with the shielding layer grounded at one end.

4.2 CAN bus interface (DB9)

Pin2: CAN_L，Pin7: CAN_H， Other NCs.

The controller is SJA1000, supporting CAN 2.0B and isolation voltage of 2.5KV. The default bit rate needs to be configured through software (usually 125k/250k/500kbps). Note that the terminal resistor (120 Ω) usually needs to be connected at the beginning and end nodes, but MXC does not have a built-in terminal resistor and needs to be connected at the external cable end.

4.3 Isolated digital I/O (16 channels)

Use a 40 pin Hirose DF13E-40DP-1.25V connector (with a spacing of 1.25mm, requiring a specialized crimping tool).

DI input: High level 5-24V, low level 0-1.5V, input resistance of 8.2k Ω (0.75W), optocoupler isolation of 1.5KV. There is a 100k Ω pull-down resistor inside, so it is at low level when suspended.

DO output: MOSFET is used, with a continuous current of 100mA per channel and a peak value of 250mA. The external power supply is 5-35V (provided by the user's VDD pin). The output circuit is connected in series with a flyback diode to protect MOSFETs when driving relays or solenoid valves, but the positive terminal of the external power supply must be connected to the VDD pin to form a flyback circuit.

Isolation power supply: The internal DC-DC converter provides isolated 5V ± 0.5V, maximum 180mA, for external sensors or DO pull-up use.

4.4 Ethernet LED Status

Each RJ45 port is equipped with dual color LED:

Left side (yellow): bright=connected but inactive, flashing=data transmission and reception, off=not connected.

Right side (green/orange): Off=10Mbps, Green=100Mbps, Orange=1Mbps.

4.5 Front panel indicator lights

PWR: Blue light, constantly on, flashing (S3/S4 sleep mode), turned off and turned off.

WDT (yellow): The watchdog timer flashes when it starts and remains on after timeout.

HDD (orange): Blinks during SATA/SSD activity.

DG (green): Always on indicates no physical storage device connection.

Digital I/O Programming (Windows API)

The manufacturer provides Matrix_dio. h and Matrix_dio. lib for reading and writing 16 isolated DIOs.

GPIO_Init(): Initialize the DIO resource, which needs to be called before all operations.

GPI-Read (U16 * pwState): Read the status of 8 DI channels and return bits 0-7 corresponding to channels 1-8 (bit=1 indicates high level, bit=0 indicates low level).

The corresponding DO write function (not fully listed in the manual, but usually has an interface similar to GPOWriteWrite (U16 wState), please refer to the complete SDK).

Practical application: DIO status can be reported to SCADA in combination with Modbus or OPC UA, or DO output can be triggered 

Key points for troubleshooting and daily maintenance

Common startup abnormalities

System not turning on: Check if the DC input voltage is within the range of 9-36V and if the polarity is reversed (V+and V - swapped). Observe whether the front panel PWR LED is lit.

No display when turned on: Try HDMI and two DP interfaces to confirm that the monitor supports them 4K@60 Or 1080p. Check if the BIOS has been mistakenly configured with serial port redirection causing display output switching (CMOS recovery is possible).

PCIe card not recognized: Confirm that the card is PCIe Gen1/2 standard, Gen3 card may not be able to downgrade (card compatibility needs to be checked). Try replacing the slot.

Serial/CAN communication failure

Confirm that the COM mode setting in BIOS matches the actual physical wiring (RS-232/422/485).

Use loopback testing (RS-232 short circuited Tx Rx) to verify if hardware transmission and reception are normal.