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CompactBlock LDX I/O Modules
Allen‑Bradley

Our Bulletin 1790D CompactBlock™ LDX I/O modules are a cost-effective distributed I/O solution for light industrial environments where high-protection specifications and advanced performance features are not required.
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1790D-TN4C0 CompactBlock LDX Analog Input Base Block product image
1790D-TN4C0 CompactBlock LDX Analog Input Base Block
end of life
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DeviceNet LDX, 4 Input Analog Current Base Block, Screw-clamp
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1790D-N4C0 CompactBlock LDX Input Block product image
1790D-N4C0 CompactBlock LDX Input Block
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DeviceNet LDX, 4 Input Analog Current Base Block, D-Shell
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1790D-TN0C2 CompactBlock LDX A/O Base Block product image
1790D-TN0C2 CompactBlock LDX A/O Base Block
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DeviceNet LDX, 2 Output Analog Current Base Block, Screw-clamp
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1790D-TN0V2 CompactBlock LDX A/O Base Block product image
1790D-TN0V2 CompactBlock LDX A/O Base Block
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DeviceNet LDX, 2 Output Voltage Analog Base Block, Screw-clamp
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1790D-T4T0 CompactBlock LDX Input Base Block product image
1790D-T4T0 CompactBlock LDX Input Base Block
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DeviceNet LDX, 4 Input Thermocouple Base Block, Screw-clamp
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1790D-0W6 CompactBlock LDX Output Block product image
1790D-0W6 CompactBlock LDX Output Block
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DeviceNet LDX I/O, 6 Relay Out Base Block, D-Shell
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1790D-8BV8V CompactBlock LDX 16 Point Comb Block product image
1790D-8BV8V CompactBlock LDX 16 Point Comb Block
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DeviceNet LDX, 24VDC, 8 Universal In/8 Sink Out Base Block, D-Shell
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1790D-N0C2 CompactBlock LDX Output Block product image
1790D-N0C2 CompactBlock LDX Output Block
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DeviceNet LDX, 2 Output Analog Current Base Block, D-Shell
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1790D-T16BV0 CompactBlock LDX 16 Point I/P Base Block product image
1790D-T16BV0 CompactBlock LDX 16 Point I/P Base Block
discontinued
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DeviceNet LDX I/O, 24VDC, 16 Universal In Base Block, Screw-clamp
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1790D-T16BV16B CompactBlock LDX 32 Point Base Block product image
1790D-T16BV16B CompactBlock LDX 32 Point Base Block
discontinued
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DeviceNet LDX, 24VDC, 16 Universal In/16 Source Out Base Block, Screw-clamp
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1790D-T16BV16V CompactBlock LDX 32 Point Base Block product image
1790D-T16BV16V CompactBlock LDX 32 Point Base Block
discontinued
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DeviceNet LDX, 24VDC, 16 Universal In/16 Sink Out Base Block, Screw-clamp
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1790D-T32BV0 32 UNIVERSAL IN  TB product image
1790D-T32BV0 32 UNIVERSAL IN TB
discontinued
Product
DeviceNet LDX I/O, 24VDC, 32 Universal In Base Block, Screw-clamp
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1790D-T4R0 CompactBlock LDX Input Base Block product image
1790D-T4R0 CompactBlock LDX Input Base Block
discontinued
Product
DeviceNet LDX, 4 Input RTD Base Block, Screw-clamp
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1790D-T8A0 CompactBlock LDX 8 Point I/P Base Block product image
1790D-T8A0 CompactBlock LDX 8 Point I/P Base Block
discontinued
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DeviceNet LDX I/O, 120VAC, 8 Input Base Block, Screw-clamp
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1790D-TN4V0 CompactBlock LDX 4 A/I Base Block product image
1790D-TN4V0 CompactBlock LDX 4 A/I Base Block
discontinued
Product
DeviceNet LDX, 4 Input Voltage Analog Base Block, Screw-clamp
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1790D-0B16 CompactBlock LDX 16 Point Output Block product image
1790D-0B16 CompactBlock LDX 16 Point Output Block
discontinued
Product
DeviceNet LDX I/O, 24VDC, 16 Source Out Base Block, D-Shell
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1790D-0V16 CompactBlock LDX 16 Point Output Block product image
1790D-0V16 CompactBlock LDX 16 Point Output Block
discontinued
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DeviceNet LDX I/O, 24VDC, 16 Sink Out Base Block, D-Shell
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1790D-T0B16 CompactBlock LDX 16 Point O/P Base Block product image
1790D-T0B16 CompactBlock LDX 16 Point O/P Base Block
discontinued
Product
DeviceNet LDX I/O, 24VDC, 16 Source Out Base Block, Screw-clamp
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1790D-T0B32 CompactBlock LDX 32 Point O/P Base Block product image
1790D-T0B32 CompactBlock LDX 32 Point O/P Base Block
discontinued
Product
DeviceNet LDX I/O, 24VDC, 32 Source Out Base Block, Screw-clamp
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1790D-T0V32 CompactBlock LDX 32 Point O/P Base Block product image
1790D-T0V32 CompactBlock LDX 32 Point O/P Base Block
discontinued
Product
DeviceNet LDX I/O, 24VDC, 32 Sink Out Base Block, Screw-clamp
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1790-0B16X CompactBlock LDX 16 Expansion Block product image
1790-0B16X CompactBlock LDX 16 Expansion Block
discontinued
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DeviceNet LDX I/O, 24VDC, 16 Source Out Expansion Block, D-Shell
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1790-0W8X CompactBlock LDX Expansion Block product image
1790-0W8X CompactBlock LDX Expansion Block
discontinued
Product
DeviceNet LDX I/O, 24VDC, 8 Relay Out Expansion Block, D-Shell
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1790-15CMCBL CompactBlock LDX Expansion Cable product image
1790-15CMCBL CompactBlock LDX Expansion Cable
discontinued
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DeviceNet LDX I/O Longer Ribbon Cable, 15 cm (Lots of 5)
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1790-7CMCBL CompactBlock LDX Expansion Cable product image
1790-7CMCBL CompactBlock LDX Expansion Cable
discontinued
Product
DeviceNet LDX I/O Replacement Ribbon Cable, 7 cm (Lots of 5)
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Overview Chevron DownChevron Down

Our Bulletin 1790D CompactBlock™ LDX I/O modules are a cost-effective distributed I/O solution for light industrial environments where high-protection specifications and advanced performance features are not required. Base blocks include I/O points and a built-in DeviceNet™ network adapter. Digital I/O expansion blocks provide the flexibility to add I/O points to your CompactBlock LDX I/O system.

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Overview

  • Includes compact package for easy installation in confined areas, including wireways and operator terminals
  • Offers base blocks that provide 4…32 I/O points
  • Includes built-in DeviceNet™ network connectivity
  • Allows addition of expansion blocks to a base block for up to 80 points per node
  • Includes universal sink/source inputs which reduce the number of components to stock and provide flexibility of input types
  • Includes node address switches and autobaud rate detection which simplifies network commissioning
  • Offers fixed screw terminals for convenient disconnection

1790 CompactBlock™ LDX Digital I/O Base Blocks

  • 24V DC, 120V AC, and relay outputs
  • Up to 32 I/O points per block
  • Each base block supports up to three expansion blocks

1790 CompactBlock LDX Analog I/O Base Blocks

  • Up to  four I/O points per block
  • 16-bit integer data format
  • Each base block supports up to two expansion blocks

1790 CompactBlock LDX Thermocouple and RTD I/O Base Blocks

  • 16-bit integer (2's complement) data format
  • Thermocouple and RTD base blocks do not support expansion blocks

1790 CompactBlock LDX Digital I/O Expansion Blocks

  • Add to base blocks to expand the I/O assembly up to 80 I/O points
  • 24V DC, 120V AC, and relay outputs
  • 8 or 16 I/O points per block
  • Compatible with all base blocks, except for thermocouple and RTD base blocks
  • Includes 7-cm ribbon cable connector

Software

FactoryTalk Network Manager
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Software
FactoryTalk Network Manager

FactoryTalk® Network Manager software provides increased visibility and insight into the performance of your network in context of your automation assets.

CompactBlock™ LDX I/O modules require RSNetWorx configuration software.

Get Started
Electronic Data Sheets (EDS)

Use EDS files with network configuration tools to help you identify products and easily commission them on a network. Use our Product Compatibility Download Center or our EPS library to search for the EDS files.

Explore the EDS library Search PCDC for EDS files
FactoryTalk Software
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Software
FactoryTalk Software

Each FactoryTalk offering centers on driving your business performance. From the design and commissioning phase on through to board room level data needs, we can bring together value to all users in your operation.

Learn More

Certifications
C-TICK CertificationC-TICK Certification
UL Marked Component Mark Canadian and United States RequirementsUL Marked Component Mark Canadian and United States Requirements
DeviceNetDeviceNet
  • cULus Class I Div 2 Hazardous
  • CE Marked
  • C-Tick
  • ODVA
  • Enclosure meets IP20

Certifications apply when product is marked. See our Product Certification site for Declarations of Conformity, certificates and other certification details. 

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Documentation Chevron DownChevron Down
Technical Specifications Publication
CompactBlock I/O, CompactBlock LDX I/O Selection Guide 1790-SG001_-EN-P
CompactBlock LDX I/O for DeviceNet Technical Data 1790D-TD001_-EN-P
User Manuals Publication
CompactBlock LDX Analog I/O User Manual 1790-UM001_-EN-P
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