Allen-Bradley 1790D-T0B16, 1790D-T8BV8V, 1790D-T8BV8B, 1790D-T0V16, 1790D-T0W6 Installation Instructions Manual
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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
2 DeviceNet Digital Base Terminal Block CompactBlock LDX I/O
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
http://www.rockwellautomation.com/literature/
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.
available from your local Rockwell Automation sales office or online at
) describes some important differences between
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
DeviceNet Digital Base Terminal Block CompactBlock LDX I/O 3
Environment and Enclosure
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.
Prevent Electrostatic Discharge
ATTENTION: This equipment is sensitive to electrostatic 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
4 DeviceNet Digital Base Terminal Block CompactBlock LDX I/O
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
DeviceNet Digital Base Terminal Block CompactBlock LDX I/O 5
North American Hazardous Location Approval
The following information applies when
operating this equipment in hazardous
locations:
Products marked "CL I, DIV 2, GP A, B, C, D" are suitable for
use in Class I Division 2 Groups A, B, C, D, Hazardous
Locations and nonhazardous locations only. Each product is
supplied with markings on the rating nameplate indicating
the hazardous location temperature code. When combining
products within a system, the most adverse temperature
code (lowest "T" number) may be used to help determine the
overall temperature code of the system. Combinations of
equipment in your system are subject to investigation by the
local Authority Having Jurisdiction at the time of
installation.
EXPLOSION HAZARD
• Do not disconnect equipment unless
power has been removed or the area is
known to be nonhazardous.
• Do not disconnect connections to this
equipment unless power has been
removed or the area is known to be
nonhazardous. Secure any external
connections that mate to this equipment
by using screws, sliding latches, threaded
connectors, or other means provided with
this product.
• Substitution of components may impair
suitability for Class I, Division 2.
• If this product contains batteries, they
must only be changed in an area known to
be nonhazardous.
Informations sur l’utilisation de cet
équipement en environnements dangereux:
Les produits marqués "CL I, DIV 2, GP A, B, C, D" ne
conviennent qu'à une utilisation en environnements de
Classe I Division 2 Groupes A, B, C, D dangereux et non
dangereux. Chaque produit est livré avec des marquages sur
sa plaque d'identification qui indiquent le code de
température pour les environnements dangereux. Lorsque
plusieurs produits sont combinés dans un système, le code
de température le plus défavorable (code de température le
plus faible) peut être utilisé pour déterminer le code de
température global du système. Les combinaisons
d'équipements dans le système sont sujettes à inspection
par les autorités locales qualifiées au moment de
l'installation.
RISQUE D’EXPLOSION
• Couper le courant ou s'assurer que
l'environnement est classé non dangereux
avant de débrancher l'équipement.
• Couper le courant ou s'assurer que
l'environnement est classé non dangereux
avant de débrancher les connecteurs.
Fixer tous les connecteurs externes reliés
à cet équipement à l'aide de vis, loquets
coulissants, connecteurs filetés ou autres
moyens fournis avec ce produit.
• La substitution de composants peut rendre
cet équipement inadapté à une utilisation
en environnement de Classe I, Division 2.
• S'assurer que l'environnement est classé
non dangereux avant de changer les piles.
Before You Begin
Read this section about important CompactBlock I/O requirements.
Current functions of CompactBlock LDX I/O blocks require the current, modular
electronic data sheet (EDS) file for RSNetWorx for DeviceNet software, version 8.0 or
later. These files are are available online at http://www.ab.com/networks/eds/
EDS files for blocks with matching catalog numbers for both D-shell and terminal block
versions are the same. On the website and in RSNetWorx for DeviceNet software,ind the
EDS file for both versions of the blocks. For example, for the EDS file for 1790D-T8BV8B
blocks, use the EDS file labelled 1790D-8BV8B.
.
Publication 1790-IN012C-EN-P - January 2015
6 DeviceNet Digital Base Terminal Block CompactBlock LDX I/O
Example: Node
Address is set at 11
Install the Base Block
To install the base block:
• set the node address on the base block.
• mount the base block.
• mount the optional expansion blocks.
• wire the terminal block.
• connect the DeviceNet cable.
Set the Node Address on the Base Block
When setting the node address on the base block, note that each base block comes with its
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.
Node Address Example
The base block reads the rotary switches at power up only. Switch settings between 64 and
99 cause the block to use the last valid node address stored internally.
You can also set the node address through RSNetWorx for DeviceNet software or a similar
configuration tool.
When you use software configuration for the node address, set the switches to 64…99.
Publication 1790-IN012C-EN-P - January 2015
DeviceNet Digital Base Terminal Block CompactBlock LDX I/O 7
16-point Expansion Module
Expansion
Cable
Cover
16-point Base Module
95 mm
(3.74 in.)
41 mm
(1.6 in.)
95 mm
(3.74 in.)
41 mm
(1.6 in.)
Expansion
Cable
Cover
44251
44252
Mount the Base Module
Mount the base block to a panel or DIN rail. We recommend that you
ground the panel or DIN rail before mounting the block.
Dimensions
EXPANSION UNIT
0
DC INPUTS
CompactBlock LDX
DC INPUTS
8
7
1790-16BVOX
16 INPUTS-DCPOWER
15
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8 DeviceNet Digital Base Terminal Block CompactBlock LDX I/O
44253
Locking Lever
Mount on a Panel
For panel mounting, use these steps.
1. Place the block against the panel where you want it mounted.
2. Gently pull and position the expansion cover to the left.
3. Place a center punch, nail, or similar device through the mounting holes in the
block and make two marks on the panel at the lower-left and upper-right corners
of the module.
4. Remove the block and drill two holes in the panel to accommodate each of the
mounting screws.
5. Replace the block on the panel and place a screw through each of the two
mounting holes.
6. Tighten the screws until the block is firmly in place.
Mount on DIN Rail
For DIN-rail mounting, use these steps.
1. Hook the top slot of the base block over the DIN rail.
2. Pull down on the locking lever while pressing the base block against the rail.
3. Push up on the locking lever to secure the base block to the rail when the base
block is flush against the rail.
Publication 1790-IN012C-EN-P - January 2015
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