The safe state is always the de-energized state.
For example:
- If the BMXSAI0410 analog input module or the BMXSDI1602 digital input module detects a dangerous internal condition, it sets the value of their inputs to the CPU to “0” (the de-energized state), which remain in that state until the underlying condition has been resolved.
- If the BMXSDO0802 digital output module or BMXSRA0405 digital relay output module detect a dangerous internal condition, it sets its outputs to the de-energized state, which remain in that state until the underlying condition has been resolved and the module is restarted.
- If the BMXSDO0802 digital output module or BMXSRA0405 digital relay output module detects a communication error on a black channel link to the CPU, the output module sets its outputs to their fallback state. NOTE: You can use Unity Pro XLS to configure the fallback state (energized, de-energized, or maintain last value) in the event black channel communication between the CPU and output module is lost.
- If the BMEP584040S or the BMEP582040S CPU detects a communication error on a black channel link to a safety input module, it sets the state of the affected inputs to “0” (the de-energized state) until the black channel again becomes operational and the CPU can again read actual input values.
For example:
- If the BMXSAI0410 analog input module or the BMXSDI1602 digital input module detects a dangerous internal condition, it sets the value of their inputs to the CPU to “0” (the de-energized state), which remain in that state until the underlying condition has been resolved.
- If the BMXSDO0802 digital output module or BMXSRA0405 digital relay output module detect a dangerous internal condition, it sets its outputs to the de-energized state, which remain in that state until the underlying condition has been resolved and the module is restarted.
- If the BMXSDO0802 digital output module or BMXSRA0405 digital relay output module detects a communication error on a black channel link to the CPU, the output module sets its outputs to their fallback state. NOTE: You can use Unity Pro XLS to configure the fallback state (energized, de-energized, or maintain last value) in the event black channel communication between the CPU and output module is lost.
- If the BMEP584040S or the BMEP582040S CPU detects a communication error on a black channel link to a safety input module, it sets the state of the affected inputs to “0” (the de-energized state) until the black channel again becomes operational and the CPU can again read actual input values.
Released for: Schneider Electric India
