Watchdog Timer Config. (J5); Hardware Reset (J6); Hdd Led (J7); Power Led (J8) - Advantech PCI-6870F User Manual

2.4.3 Watchdog timer config. (J5)

An on-board 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 one jumper and running the control
software. (Refer to Appendix A.)
When the watchdog timer is enabled and the CPU shuts down, the
watchdog timer will automatically reset the system.
Table 2.5: Watchdog timer (J5)
Pin 1-2 Function
closed enable*
open disable
* default setting

2.4.4 Hardware Reset (J6)

If you install a reset switch, it should be an open single pole switch.
Momentarily pressing the switch will activate a reset. The switch
should be rated for 10 mA, 5 V.

2.4.5 HDD LED (J7)

Basic HDD activity indicator. Connect an LED to J7, and when
there is disk activity, the LED lights up.

2.4.6 Power LED (J8)

J8 is for your basic power on indicator. Connect an LED to J8, and
when system power is on, the LED will be on.
PCI-6870 User's Manual 14