Patent ID: 9651931
Date: 2017-05-16
CPC Classifications: G05B,G06F,H01L,H03K,H04L

Claim:
1. An industrial control system comprising: first and second integrated circuit elements communicating first and second field signals, respectively, and first and second activity signals, respectively, the first and second integrated circuit elements each including a watchdog timing circuit; and first and second power shut-off components configured to selectively switch between 1) providing power for the first and second field signals, respectively, and 2) removing power from the first and second field signals, respectively, wherein the watchdog timing circuit of the first integrated circuit element receives the second activity signal from the second integrated circuit element, and the watchdog timing circuit of the second integrated circuit element receives the first activity signal from the first integrated, circuit element, and wherein the watchdog timing circuit of the first integrated, circuit element is configured to cause the second power shut-off component to selectively switch, and the watchdog timing circuit of the second integrated circuit element is configured to cause the first power shut-off component to selectively switch.