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    Discontinued / Obsolete by OEM
    Apter Power supports exact-model sourcing and documentation review for existing 1790D-TN0C2 DeviceNet installations.

1790D-TN0C2

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Allen-Bradley 1790D-TN0C2 is a DeviceNet CompactBlock LDX base block with two analog current outputs and screw-clamp terminals.
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Technical specifications for 1790D-TN0C2

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1790D-TN0C2
  • Product Family:
    CompactBlock LDX
  • Product Type:
    Analog Current Output Module
  • Stock:
    2
  • Output Current Range:
    0...20 mA
  • Resolution:
    12-bit (0...4095 counts, 4.88 µA per bit)
  • Output Load Resistance:
    600 Ω maximum (Rockwell technical data)
  • DeviceNet Power Supply:
    11...28.8V DC, 1.2 W max. consumption at 28.8V DC
  • Auxiliary Field Power:
    21.6...26.4V DC, 1.5 W max. consumption at 26.4V DC
  • Operating Temperature:
    0...55 °C (Series A); 0...60 °C (Series B)
  • Storage Temperature:
    -40 °C to 85 °C
  • Weight:
    0.85 kg
  • Estimated shipping dimensions:
    11x5.5x4.2cm
  • Tariff Code:
    8537101190
  • Country of origin:
    Korea (Republic of)
  • 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 Variant Selection DeviceNet Node Output Service Product Applications

Features:

  • Two-channel analog current-output base block for CompactBlock LDX distributed I/O.
  • DeviceNet network connection with screw-clamp terminal construction.
  • Current-output designation TN0C2, distinct from voltage-output and analog-input variants.
1790D-TN0C2 brings two current-output channels to a distributed DeviceNet station. It is not a PROFIBUS interface, so the network type matters before any replacement is selected.

The screw-clamp base-block form is part of this full catalog identity. A D-shell or voltage-output block from the same family is a different product and should not be substituted by a shortened family name.

Rockwell lists 1790D-TN0C2 as discontinued. For a maintained installation, keep the node address, configuration record and connected channel assignments with the removed block during service planning.

1790D-TN0C2 | Manufacturer: Allen-Bradley | Product Type: CompactBlock LDX DeviceNet Current-Output Base Block. Apter Power supports exact-model documentation review, quotation and sourcing for existing installations.
Allen-Bradley 1790D-TN0C2 Analog Current Output Module Manuals,Datasheets,Link 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.
  • 1790D-TN0C2 is the two-channel current-output base block in this CompactBlock LDX family.
  • The TN0C2 suffix identifies a current-output version; TN0V2 names a voltage-output variant.
  • This TN version uses screw-clamp terminals; the N0C2 D-shell version has a different connector arrangement.
  • Keep the complete catalog code and a photo of the removed terminal face when requesting a spare.
  • 1790D-TN0C2 communicates as a DeviceNet distributed I/O node, not as a PROFIBUS module.
  • Before replacement, capture the existing node address and the controller-side configuration record.
  • Compare the available DeviceNet connection and screw-clamp terminal arrangement with the removed unit.
  • Reapply the site-approved configuration using the Rockwell module instructions.
  • The base block provides two analog current-output channels for field devices.
  • Record which plant loop uses each channel before disconnecting the old block.
  • Use the Rockwell terminal diagram and site isolation procedure for any wiring change.
  • If a loop does not respond after replacement, check the recorded channel assignment and module status before altering the control program.
  • 1790D-TN0C2 fits distributed installations that already use CompactBlock LDX DeviceNet I/O.
  • It provides two commanded current outputs for existing field-control loops.
  • The screw-clamp form supports maintenance where that terminal style is installed.
  • For a discontinued-node repair, exact catalog matching preserves the original network and terminal arrangement.
Description
1790D-TN0C2 is an Allen-Bradley CompactBlock LDX analog current-output base block for a DeviceNet distributed-I/O node. Its two output channels support an installed system that already uses this current-output form.

1790D-TN0C2 has screw-clamp terminals. The similarly named 1790D-N0C2 uses a D-shell connection, while 1790D-TN0V2 is a voltage-output version; neither difference can be ignored during an exact-model replacement review.

1790D-TN0C2 was discontinued by Rockwell Automation on December 30, 2024. For service work, retain the full catalog identity, DeviceNet node record and two channel assignments before selecting or installing a spare.
Alternative Names
1790DTN0C2 1790D TN0C2 I790D-TN0C2 179OD-TN0C2 1790D-TNOC2
Technical notes
Rockwell identifies 1790D-TN0C2 as a DeviceNet two-channel analog current-output screw-clamp base block. Its technical data distinguishes network power from field power and provides a model-specific terminal diagram; qualified personnel should use that diagram and the installed system record for any wiring work.
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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.
Our old cabinet uses PROFIBUS. Is 1790D-TN0C2 the matching network module?
No. Rockwell identifies 1790D-TN0C2 as a DeviceNet base block. Check the removed node label and network drawings before choosing a replacement for a PROFIBUS installation.
Can I replace a failed 1790D-TN0C2 with 1790D-TN0V2?
Not as a like-for-like part: TN0C2 provides analog current outputs, while TN0V2 is the voltage-output version. Match the required output signal and full catalog code first.
A spare 1790D-N0C2 is available. Does it fit the 1790D-TN0C2 terminal arrangement?
Both belong to the analog current-output family, but Rockwell lists the N0C2 with a D-shell connector and TN0C2 with screw-clamp terminals. Review the installed connector and mounting arrangement before considering any change.
What information should we record before removing a 1790D-TN0C2 node?
Record the full catalog marking, DeviceNet node address, controller configuration and which field loop is on each of the two output channels. This helps distinguish a replacement mismatch from a mapping issue.
One output loop does not respond after a 1790D-TN0C2 exchange. What should be checked first?
Compare the recorded channel assignment and the module status with the Rockwell wiring diagram and approved site configuration. Do not change terminal connections based only on the shared CompactBlock family name.
The OEM lists 1790D-TN0C2 as discontinued. What should a spare request include?
Provide the exact TN0C2 code, a clear photo of the removed screw-clamp unit and the DeviceNet configuration record. A family-level or shortened 1790D code is insufficient for a like-for-like review.

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