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Reference Manual
300530EN, Rev BA
September 2012
Rosemount 2410
3-26
Section 3. Installation
Relay Outputs
There are two optional relay outputs. You can choose Normally Open (NO) or
Normally Closed (NC) by setting a switch as described in “Relay Output
Configuration” on page 6-15.
NO and NC refers to the contact position when a relay is deenergized. This is
also referred to as the Alarm state. The terminology can be summarized as
follows:
Table 3-9. Designation of relay
contact positions
NOTE!
Ensure that maximum current through the relays does not exceed the
specifications in Appendix A: Reference Data.
See “Relay Output” on page C-6 in Appendix C: Advanced Configuration for
information on how to configure the relay source signal, set points etc. for the
Rosemount 2410 Tank Hub.
Normally Closed (NC) Normally Open (NO)
Deenergized Energized Deenergized Energized
Closed Open Open Closed
Not active Active Not active Active
Alarm (Reset) Normal Alarm (Reset) Normal