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    Apter Power supports KJ4001X1-CG1 12P1812X042 documentation, sourcing, quotation and legacy-system planning.

KJ4001X1-CG1 12P1812X042

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Emerson KJ4001X1-CG1 12P1812X042 is a DeltaV M-series thermocouple terminal block that carries low-level temperature signals from field wiring to the matched I/O card.
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Technical specifications for KJ4001X1-CG1 12P1812X042

  • Manufacturer:
    Emerson
  • Part Number:
    KJ4001X1-CG1 12P1812X042
  • Product Family:
    DeltaV
  • Product Type:
    Thermocouple Terminal Block
  • Stock:
    1
  • Emerson part number:
    12P1812X042
  • Signal role:
    Thermocouple and millivolt termination
  • System interface:
    DeltaV M-series I/O
  • Field connection:
    Screw-terminal interface
  • Maintenance role:
    Retains documented field-channel mapping
  • Lifecycle:
    Obsolete
  • Weight:
    0.08 kg
  • Estimated shipping dimensions:
    9x5.3x4.1cm
  • Tariff Code:
    Please confirm the destination before shipping
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Signal Termination Card Pairing Wiring Practice Product Applications

Features:

  • Thermocouple and millivolt field-termination interface.
  • Designed for a matched DeltaV M-series temperature I/O position.
  • Uses KJ4001X1-CG1 and 12P1812X042 as the complete identity.
The block provides the removable boundary between field temperature wiring and the electronic I/O card.

Its practical value is retention of polarity and channel mapping during card service.

Selection should follow the paired card and the approved terminal drawing.
Availability is subject to Apter Power inventory and sourcing confirmation.
Emerson KJ4001X1-CG1 12P1812X042 Thermocouple Terminal Block Manuals,Datasheets,Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • Lands low-level thermocouple and millivolt field conductors.
  • Preserves documented channel order at the I/O boundary.
  • Requires polarity to remain consistent through conductor transfer.
  • Keeps wiring work separate from replacement of the electronic card.
  • Operates as the terminal interface for the matched DeltaV temperature card.
  • Uses the CG1 suffix to distinguish its connection arrangement.
  • Must not be approved solely because another block fits the carrier.
  • Requires the paired card identity to agree with the loop documentation.
  • Isolate the affected field circuits before disturbing conductors.
  • Label each channel before removal from the existing block.
  • Investigate polarity and assignment before changing calibration values.
  • Stop commissioning when the terminal drawing and physical landing points conflict.
  • DeltaV M-series thermocouple input assemblies.
  • Low-level temperature and millivolt field termination.
  • Terminal-block renewal while retaining field wiring.
  • Legacy process-temperature loop maintenance.
Description
Thermocouple measurements begin as very small field signals, so their first cabinet interface has an outsized influence on usable temperature data. KJ4001X1-CG1 12P1812X042 provides that screw-terminal boundary between thermocouple or millivolt wiring and the matched DeltaV M-series I/O card.

By keeping field terminations on KJ4001X1-CG1 12P1812X042, the installation retains a stable channel-to-sensor relationship when the removable I/O electronics are serviced. That separation supports maintenance without redefining how each temperature point enters the control strategy.

For an existing panel, KJ4001X1-CG1 12P1812X042 is valuable as a wiring-continuity component, not as a stand-alone temperature instrument. Its application is bounded by the paired M-series card and the established thermocouple channel map, which together determine whether readings return correctly after replacement.
Alternative Names
Emerson KJ4001X1-CG1 12P1812X042 KJ4001X1CG1 KJ4001XI-CG1 KJ4001X1-CGI 12P1812X042 DeltaV thermocouple terminal block KJ4001X1-CG1 terminal block KJ4001X1-CG1 12P1812X042 TC block Emerson 12P1812X042
Technical notes
KJ4001X1-CG1 12P1812X042 handles low-level thermocouple wiring, so polarity and channel assignment directly affect the reported temperature. Isolate the field circuit and stop the exchange if the paired I/O card or terminal drawing identifies a different terminal-block configuration.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
A temperature I/O card is being replaced. When should KJ4001X1-CG1 12P1812X042 remain in the assembly?
Keep it when the installed design uses this CG1 thermocouple terminal block and its field wiring is intact. A different I/O-card terminal requirement means the block must be re-evaluated.
Can thermocouple conductors be moved onto KJ4001X1-CG1 12P1812X042 without checking polarity?
No. Reversed polarity can create a misleading temperature response, so conductor polarity and channel assignment must follow the loop drawing.
Why is the paired I/O card important for KJ4001X1-CG1 12P1812X042?
The block is only the field termination interface. Signal processing occurs in the matched card, and a terminal block intended for another card cannot be assumed compatible.
A channel drifts after installing KJ4001X1-CG1 12P1812X042. What should be isolated first?
Separate a wiring or polarity problem from an I/O-card problem by checking the affected loop against the original terminal assignment before changing calibration data.
What prevents a similar DeltaV terminal block from replacing KJ4001X1-CG1 12P1812X042?
Connector fit does not prove the same signal assignment. The CG1 and 12P identity, paired card and terminal drawing must agree.
What should a buyer send with a KJ4001X1-CG1 12P1812X042 request?
Send the complete KJ and 12P codes, paired I/O-card identity, channel count in use and a clear terminal-label record so the field interface can be checked.