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The Digital Input Sequence of Events (DISOE) accepts 24VDC discrete signals as discrete inputs. The inputs can be time tagged to support 1ms resolution Sequence of Events.
Notable Features
• Three modes of operation:
• Normal (20ms PV scan)
• Sequence of Events (1ms resolution SOE, 20ms PV scan)
• Low Latency (5ms PV scan)
• Extensive internal diagnostics for data integrity
• Open Wire Detection (in Normal mode only)
• Optional redundancy
• Internal or external field power selection
• On board excitation power (no need for marshalling power)
• Supplies Non-incendive field power
• Direct / Reverse Input Indication
• Galvanic Isolation
Open-Wire Bad PV Detection
This Series C IO function will be able to detect and annunciate an open field wire. In addition, a seemingly valid PV from a channel diagnosed as having an open wire will provide a status of “invalid” (thus preventing incorrect control action).
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