Watchdog Timers is designed for computer restart in case of system hang at server or in terminal. Key features: - minimal time-1 second, - maximum time -18 hours - timer output with optoelectronic isolator - maximal commutation voltage Г 350 V - maximal commutated current - 0.13А Timer operation principles: Under load Windows2000/XP timer is determined as USB HID-device. Timer is designed to computer restart in case of system hang. For timer activation it is necessary to set up acknowledge code timeout from software, software is in operation condition. If in set period the timer doesnЙt get software acknowledge code, it will restart the computer through Reset contacts on the motherboad.