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2.17.2 Fan connector (MJ1-B)
The PCM-5335 is equipped with a low power dissipation GX1 CPU.
With only a heat sink, the PCM-5335 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.
Chapter 2 Installation
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