Advantech PCM-3350 Series Fan connector MJ1-B, Reset button connector MJ1-C, IR connector MJ1-D

2.17.2 Fan connector (MJ1-B)

The PCM-3350 is equipped with a low power dissipation GX1 CPU. With only a heat sink, the PCM-3350 will operate normally at tempera- tures up to 60° C. At temperatures above 60° C, a fan is recommended. A CPU fan power supply connector is provided (+5 V input) in addition to the CPU power supply.

This provides power supply to the optional CPU cooling fan. This connector is only available when +5 V power is supplied to the board.

Warning! Before making the connection, make sure that the voltage is absolutely correct and matched with the correct connector.

2.17.3 Reset button connector (MJ1-C)

If you install a reset button, it should be a single pole switch rated at 5 V. Momentarily pressing the button will activate a reset.

For reset button pin assignments, please see Appendix C.

2.17.4 IR connector (MJ1-D)

This connector supports the optional wireless infrared transmitting and receiving module. This module mounts on the system case. You must configure the setting through BIOS setup.

2.17.5 Watchdog timer configuration (MJ1-E)

An onboard watchdog timer reduces the chance of disruptions which EMP (electro-magnetic pulse) interference can cause. This is an invaluable protective device for standalone or unmanned applications. Setup involves two jumpers and running the control software (refer to Appendix A).

Whnen the watchdog timer is enabled and the CPU shuts down, the watchdog timer will automatically either reset the system or generate an interrupt on IRQ11, depending on jumper MJ1-E settings.

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