Patent ID: 9747469
Date: 2017-08-29
CPC Classifications: G05F,G06F,Y04S

Claim:
1. A method for locking out a remote terminal unit, comprising: receiving, by a receiving device, at least a lockout request and a lockout permit, wherein the lockout permit includes at least a public key associated with a user; placing, by a processing device, a lockout on the remote terminal unit; generating, by the processing device, a lockout identifier associated with the remote terminal unit, and a lockout removal nonce; encrypting, by the processing device, the generated lockout removal nonce using the public key associated with the user; generating, by the processing device, a receipt including at least the generated lockout identifier and encrypted lockout removal nonce; transmitting, by a transmitting device, the generated receipt in response to the received lockout request; if the lockout associated with the generated lockout identifier is a first lockout placed on the remote terminal unit, de-energizing one or more energized circuits associated with the remote terminal unit; and if the lockout associated with the generated lockout identifier is a second or subsequent lockout placed on the remote terminal unit, verifying that the one or more circuits associated with remote terminal unit are de-energized.