Honeywell 07191/1/1 Temperature Sensor Relay Output Module

Configured for high-precision thermal monitoring, RTD signal digitization, and automated threshold relay execution within Honeywell Distributed Control Systems (DCS) and process automation architectures, the Honeywell 07191/1/1 (07191/1/1 Temperature Sensor Relay Output Module) provides direct physical/electrical execution. The instrument-grade control module interfaces industrial resistance temperature detectors straight to integrated mechanical safety loops.

Hardware Specifications

Process Control & DCS Instrumentation Rails

• 4-20 mA HART Loop Protocol and Channel-to-Channel Isolation The module architecture enforces precise physical barrier paths across its active inputs. By isolating the low-voltage Pt100 excitation loop from adjacent multi-point control boards, the hardware prevents dynamic ground loop shifts from skewing the 0.1 deg C measurement resolution, keeping individual channel signals clean within high-density instrument enclosures.
• Cold Junction Compensation (CJC) and Signal Conversion Pathways Because this hardware specializes in Pt100 RTD resistance calculation rather than thermocouple voltage tracking, the input conditioning circuits execute continuous constant-current lead resistance compensation instead of standard CJC thermal offsets. The 3-wire configuration measures and subtracts field terminal lead resistance automatically, preventing local ambient terminal box fluctuations from degrading the baseline ± 0.5 deg C accuracy matrix.

Frequently Asked Questions

Q: How is the integrated relay output configured to respond during an RTD sensor failure event?

A: The internal processing logic continuously tracks sensor loop resistance parameters. If an electrical open-circuit or short-circuit is detected on the Pt100 lines, the module flags a field transducer fault, bypasses standard automatic threshold evaluation, and transitions the physical relay contacts to a predefined fail-safe state to protect downstream industrial hardware.

Q: What are the input voltage boundaries for the 24 VDC power terminals?

A: The hardware operates within a strict ± 15% voltage window, allowing input supply fluctuations from 20.4 VDC up to 27.6 VDC. Crossing outside these specific potential limits will disrupt the regulated sensor excitation currents and trigger an internal low-voltage logic lockout.