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140XBP00400 Dual channel module

Series C AO module supports the FAILOPT parameter on a per channel basis. The user can configure each channel to either HOLD LAST VALUE, or SHED to a SAFE VALUE. The Output will always go to zero, the safe state, if the IOM device electronics fails.Open-wire Bad PV Detection This Series C IO function will be able to detect and annunciate Open field wire. In addition, a seemingly-valid PV from a channel diagnosed as having a Open-wire will provide a status of “invalid” (thus preventing incorrect control action).

Digital Input Sequence of Events

• 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).

The Digital Input High Voltage accepts 120VAC / 125VDC (CC-TDI110, 120), 120VAC (CC-TDI151 PROX) or 250VAC (CC-TDI2xx) signals as discrete inputs. The same IOM but different IOTA is used for both the 120VAC / 125VDC and 250VAC models. This reduces the number of spares required to support Series C system maintenance.

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