Allen-Bradley DeviceNet Digital Base Terminal Block CompactBlock LDX I/O Series B Installation Instructions
Allen-Bradley DeviceNet Digital Base Terminal Block CompactBlock LDX I/O Series B is a versatile input/output module designed for use in industrial automation systems. The base block can be used to configure inputs and outputs for various applications. It features a flexible mounting design that allows users to install it on DIN rails or panels. This module is ideal for applications where simple and reliable data acquisition and control is required.
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Installation Instructions
DeviceNet Digital Base Terminal
Block CompactBlock LDX I/O
Catalog Numbers 1790D-T16BV0, 1790D-T8BV8V,
1790D-T8BV8B, 1790D-T0B16, 1790D-T0V16, 1790D-T0W6,
1790D-T8A0, 1790D-T0A6
Table of Contents
Topic Page
Important User Information 2
Environment and Enclosure 3
Prevent Electrostatic Discharge 3
North American Hazardous Location Approval 5
Before You Begin 5
Install the Base Block 6
Set the Node Address on the Base Block 6
Mount the Optional Expansion Block 9
Wiring the Terminal Block 10
Interpret the Status Indicators 15
Cable Break Procedures 16
Specifications 17
DeviceNet Digital Base Terminal
Block CompactBlock LDX I/O
Catalog Numbers 1790D-T16BV0, 1790D-T8BV8V,
1790D-T8BV8B, 1790D-T0B16, 1790D-T0V16, 1790D-T0W6,
1790D-T8A0, 1790D-T0A6
Table of Contents
Topic Page
Important User Information 2
Environment and Enclosure 3
Prevent Electrostatic Discharge 3
North American Hazardous Location Approval 5
Before You Begin 5
Install the Base Block 6
Set the Node Address on the Base Block 6
Mount the Optional Expansion Block 9
Wiring the Terminal Block 10
Interpret the Status Indicators 15
Cable Break Procedures 16
Specifications 17
2 DeviceNet Digital Base Terminal Block CompactBlock LDX I/O
Publication 1790-IN012C-EN-P - January 2015
Important User Information
Solid-state equipment has operational characteristics differing from those of electromechanical
equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls
(Publication SGI-1.1 available from your local Rockwell Automation sales office or online at
http://www.rockwellautomation.com/literature/) describes some important differences between
solid-state equipment and hard-wired electromechanical devices. Because of this difference, and also
because of the wide variety of uses for solid-state equipment, all persons responsible for applying this
equipment must satisfy themselves that each intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages
resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the
many variables and requirements associated with any particular installation, Rockwell Automation, Inc.
cannot assume responsibility or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits,
equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell
Automation, Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
WARNING: Identifies information about practices or circumstances that can cause an
explosion in a hazardous environment, which may lead to personal injury or death,
property damage, or economic loss.
ATTENTION: Identifies information about practices or circumstances that can lead to
personal injury or death, property damage, or economic loss. Attentions help you identify
a hazard, avoid a hazard and recognize the consequences.
SHOCK HAZARD: Labels may be on or inside the equipment (for example, drive or
motor) to alert people that dangerous voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment (for example, drive or motor)
to alert people that surfaces may reach dangerous temperatures.
IMPORTANT Identifies information that is critical for successful application and understanding of
the product.
Publication 1790-IN012C-EN-P - January 2015
Important User Information
Solid-state equipment has operational characteristics differing from those of electromechanical
equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls
(Publication SGI-1.1 available from your local Rockwell Automation sales office or online at
http://www.rockwellautomation.com/literature/) describes some important differences between
solid-state equipment and hard-wired electromechanical devices. Because of this difference, and also
because of the wide variety of uses for solid-state equipment, all persons responsible for applying this
equipment must satisfy themselves that each intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages
resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the
many variables and requirements associated with any particular installation, Rockwell Automation, Inc.
cannot assume responsibility or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits,
equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell
Automation, Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
WARNING: Identifies information about practices or circumstances that can cause an
explosion in a hazardous environment, which may lead to personal injury or death,
property damage, or economic loss.
ATTENTION: Identifies information about practices or circumstances that can lead to
personal injury or death, property damage, or economic loss. Attentions help you identify
a hazard, avoid a hazard and recognize the consequences.
SHOCK HAZARD: Labels may be on or inside the equipment (for example, drive or
motor) to alert people that dangerous voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment (for example, drive or motor)
to alert people that surfaces may reach dangerous temperatures.
IMPORTANT Identifies information that is critical for successful application and understanding of
the product.
DeviceNet Digital Base Terminal Block CompactBlock LDX I/O 3
Publication 1790-IN012C-EN-P - January 2015
Environment and Enclosure
Prevent Electrostatic Discharge
ATTENTION: This equipment is intended for use in a Pollution Degree 2
industrial environment, in overvoltage Category II applications (as defined in
IEC publication 60664-1), at altitudes up to 2000 meters (6562 ft)
without derating.
This equipment is considered Group 1, Class A industrial equipment according
to IEC/CISPR Publication 11. Without appropriate precautions, there may be
potential difficulties ensuring electromagnetic compatibility in other
environments due to conducted as well as radiated disturbance.
This equipment is supplied as open-type equipment. It must be mounted within
an enclosure that is suitably designed for those specific environmental
conditions that will be present and appropriately designed to prevent personal
injury resulting from accessibility to live parts. The enclosure must have
suitable flame-retardant properties to prevent or minimize the spread of flame,
complying with a flame spread rating of 5VA, V2, V1, V0 (or equivalent) if
non-metallic. The interior of the enclosure must be accessible only by the use
of a tool. Subsequent sections of this publication may contain additional
information regarding specific enclosure type ratings that are required to
comply with certain product safety certifications.
In addition to this publication, see:
• Industrial Automation Wiring and Grounding Guidelines, for additional
installation requirements, Allen-Bradley publication 1770-4.1.
• NEMA Standards publication 250 and IEC publication 60529, as
applicable, for explanations of the degrees of protection provided by
different types of enclosure.
ATTENTION: This equipment is sensitive to el ectrostatic discharge, which can
cause internal damage and affect normal operation. Follow these guidelines
when you handle this equipment:
• Touch a grounded object to discharge potential static.
• Wear an approved grounding wriststrap.
• Do not touch connectors or pins on component boards.
• Do not touch circuit components inside the equipment.
• Use a static-safe workstation, if available.
• Store the equipment in appropriate static-safe packaging when not in use.
Publication 1790-IN012C-EN-P - January 2015
Environment and Enclosure
Prevent Electrostatic Discharge
ATTENTION: This equipment is intended for use in a Pollution Degree 2
industrial environment, in overvoltage Category II applications (as defined in
IEC publication 60664-1), at altitudes up to 2000 meters (6562 ft)
without derating.
This equipment is considered Group 1, Class A industrial equipment according
to IEC/CISPR Publication 11. Without appropriate precautions, there may be
potential difficulties ensuring electromagnetic compatibility in other
environments due to conducted as well as radiated disturbance.
This equipment is supplied as open-type equipment. It must be mounted within
an enclosure that is suitably designed for those specific environmental
conditions that will be present and appropriately designed to prevent personal
injury resulting from accessibility to live parts. The enclosure must have
suitable flame-retardant properties to prevent or minimize the spread of flame,
complying with a flame spread rating of 5VA, V2, V1, V0 (or equivalent) if
non-metallic. The interior of the enclosure must be accessible only by the use
of a tool. Subsequent sections of this publication may contain additional
information regarding specific enclosure type ratings that are required to
comply with certain product safety certifications.
In addition to this publication, see:
• Industrial Automation Wiring and Grounding Guidelines, for additional
installation requirements, Allen-Bradley publication 1770-4.1.
• NEMA Standards publication 250 and IEC publication 60529, as
applicable, for explanations of the degrees of protection provided by
different types of enclosure.
ATTENTION: This equipment is sensitive to el ectrostatic discharge, which can
cause internal damage and affect normal operation. Follow these guidelines
when you handle this equipment:
• Touch a grounded object to discharge potential static.
• Wear an approved grounding wriststrap.
• Do not touch connectors or pins on component boards.
• Do not touch circuit components inside the equipment.
• Use a static-safe workstation, if available.
• Store the equipment in appropriate static-safe packaging when not in use.
4 DeviceNet Digital Base Terminal Block CompactBlock LDX I/O
Publication 1790-IN012C-EN-P - January 2015
WARNING: If you connect or disconnect the communications cable with
power applied to this module or any device on the network, an electrical arc
can occur. This could cause an explosion in hazardous location installations.
Be sure that power is removed or the area is nonhazardous before
proceeding.
WARNING: If you connect or disconnect wiring while the field-side power is
on, an electrical arc can occur. This could cause an explosion in hazardous
location installations.
Be sure that power is removed or the area is nonhazardous before
proceeding.
ATTENTION: To comply with the CE Low Voltage Directive (LVD), all wiring
connections to this equipment must be powered from a source compliant with
the following:
Safety Extra Low Voltage (SELV) or Protected Extra Low Voltage (PELV).
ATTENTION: To comply with UL restrictions, DeviceNet must be powered
from a source compliant with the following:
Class 2 or Limited Voltage/Current.
Publication 1790-IN012C-EN-P - January 2015
WARNING: If you connect or disconnect the communications cable with
power applied to this module or any device on the network, an electrical arc
can occur. This could cause an explosion in hazardous location installations.
Be sure that power is removed or the area is nonhazardous before
proceeding.
WARNING: If you connect or disconnect wiring while the field-side power is
on, an electrical arc can occur. This could cause an explosion in hazardous
location installations.
Be sure that power is removed or the area is nonhazardous before
proceeding.
ATTENTION: To comply with the CE Low Voltage Directive (LVD), all wiring
connections to this equipment must be powered from a source compliant with
the following:
Safety Extra Low Voltage (SELV) or Protected Extra Low Voltage (PELV).
ATTENTION: To comply with UL restrictions, DeviceNet must be powered
from a source compliant with the following:
Class 2 or Limited Voltage/Current.
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Key features
DeviceNet communication
Modular design
DIN rail or panel mounting
Input/Output capabilities
16-point base block
8-point expansion block
Sinking/Sourcing inputs/outputs
Relay outputs
Hazardous location approval
Frequently asked questions
You can set the node address using the rotary switches on the front of the base block. Each block has its own internal program set for node address 63. To reset the node address, adjust the switches on the front of the base block. The two switches are most significant digit (MSD) and least significant digit (LSD). You can set switches to 00…63.
The base block requires a 24V DC nominal supply voltage, with a voltage range of 10…28.8V DC.
The CompactBlock LDX I/O is designed for use in industrial environments with a temperature range of 0…60 °C (32…140 °F) and a relative humidity of 5…90% non-condensing.
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