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Installation Instructions
FLEX I/O Remote I/O Adapter Module
1794-ASBLT Series D
WARNING
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.literature.rockwellautomation.com) 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 we use notes to make you aware of safety considerations.
WARNING
IMPORTANT
ATTENTION
SHOCK HAZARD
Use the 1794-ASBLT Series D adapter when
communicating with Classic PLC-5/15 or
PLC-5/25 via Remote I/O. The 1794-ASBLT
Series D adapter is a replacement for the
1794-ASB Series D adapter only when
communicating with PLC-5/15 or PLC5/25.
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.
Identifies information that is critical for successful application
and understanding of the product.
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
• recognize the consequence
Labels may be located on or inside the equipment (e.g., drive or
motor) to alert people that dangerous voltage may be present.
ATTENTION
WARNING
WARNING
ATTENTION
ATTENTION
Environment and Enclosure
This equipment is intended for use in a Pollution Deg ree 2 industrial
environment, in overvoltage Category II applications (as defined in
IEC publication 60664-1), at altitudes up to 2000 meters 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 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.
See NEMA Standards publication 250 and IEC publication 60529, as
applicable, for explanations of the degrees of protection provided by
different types of enclosure. Also, see the appropriate sections in this
publication, as well as the Allen-Bradley publication 1770-4.1
("Industrial Automation Wiring and Grounding Guidelines"), for
additional installation requirements pertaining to this equipment.
When you insert or remove the module while backplane power is on,
or connect or disconnect the serial cable with power applied to this
module or the serial device on the other end of the cable, 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.
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.
FLEX I/O is grounded through the DIN rail to chassis ground. Use
zinc plated yellow-chromate steel DIN rail to assure proper
grounding. The use of other DIN rail materials (e.g. aluminum,
plastic, etc.) that can corrode, oxidize, or are poor conductors, can
result in improper or intermittent grounding.
Preventing Electrostatic Discharge
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.
• If available, use a static-safe workstation.
BURN HAZARD
Labels may be located on or inside the equipment (e.g., drive or
motor) to alert people that surfaces may be dangerous
temperat ures.
Publication 1794-IN110A-EN-P - August 2005
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2
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 C lass I Division 2 Groups A, B, C,
D, Hazardous Locations and nonhazar dous locations
only. Each product is supp lied with markings on the
rating namepla te indicating the ha zardous location
temperature co de. When combining produ cts within
a system, the most adverse temperature code
(lowest “T” number ) may be used to help deter mine
the overall temperatur e code of the system.
Combinations of equipment in your sys tem are
subject to investiga tion by the local Authority
Having Jurisdic tion at the time of in stallation.
WARNING
EXPLOSION HAZARD
• Do not disconnect
equipment unless power has
been remove d or the area is
known to be nonha zardous.
• Do not disconnect
connections to this equipment
unless power has been
removed or the area is known
to be nonhazard ous. Secure
any external connections that
mate to this eq uipment 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 ar ea known to
be nonhazardous .
Informations sur l’utilisation de cet équipement en
environnements dangereux :
Les produits marq ués "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 d angereux et non
dangereux. Chaq ue produit est livré avec des marquages sur
sa plaque d’iden tification qui indiqu ent 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 ê tre utilisé pour détermine r le code de
température global du syst ème. Les combinaisons
d’équipements dans le système sont su jettes à inspection
par les autorités locales qualifiées au moment de
l’installation.
VERTISSEME NT
RISQUE D’EXPLOSION
• Couper le cour ant ou s’assurer
que l’environnem ent est classé
non dangereux a vant de
débrancher l'éq uipement.
• Couper le cour ant ou s'assurer
que l’environnem ent est classé
non dangereux a vant de
débrancher les connecteurs. Fixer
tous les con necteurs externes
reliés à cet équip ement à l'aide de
vis, loquets coulissants,
connecteurs filetés ou autres
moyens fournis avec ce produit.
• La substitution de composants
peut rendre c et équipement
inadapté à une ut ilisation en
environnement de Classe I,
Division 2.
• S’assurer que l’ environnement
est classé non dan gereux avant de
changer les piles.
Remote I/O Adapter, Cat. No. 1794-ASBLT Series D
These adapters are shipped configured for standard addressing mode. In
Standard Addressing Mode, the 1794-ASBLT series D adapter can be used as a
replacement for 1794-ASB series A and B remote I/O adapters.
1
2
1794-ASBLT
3
4, 5
6
Component Identification
1 Remote I/O Adapter Module
2 Indicators
3 Communication reset button (PRL)
4 Access door to switches S1 and S2
5 Switches S1 and S2 (behind door)
6 Remote I/O cable connector
7 +V dc connections
8 -V common connections
9 Flexbus connector
9
8
7
Install Your Adapter Module
A
B
C
ATTENTION
During mounting of all devices, be sure that all
debris (such as metal chips or wire strands) is kept
from falling into the module. Debris that falls into
the module could cause damage on power up.
Mount on a DIN Rail Before Installing the Terminal Base Units
1. Hook the lip on the rear of the adapter onto the top of the DIN rail,
and rotate the adapter module onto the rail.
2. Press the adapter module down onto the DIN rail until flush. Locking
tab C will snap into position and lock the adapter module to the DIN
rail.
3. If the adapter module does not lock in place, use a screwdriver or
similar device to move the locking tab down while pressing the
adapter module flush onto the DIN rail, and release the locking tab to
lock the adapter module in place. If necessary, push up on the locking
tab to lock.
4. Connect the adapter wiring as shown under “Wiring” later in this
document.
Mount (or Replace) the Adapter on an Existing System
1. Remove the RIO plug-in connector from the front of the adapter.
2. Disconnect any wiring jumpered to the adjacent terminal base.
WARNING
3. Open the module latching mechanism and remove the module from
the base unit to which the adapter will be attached.
4. Push the flexbus connector toward the right side of the terminal base
to unplug the backplane connection. (When fully retracted, you will
see a raised dot on the connector.)
5. Release the adapter locking tab and remove the adapter module.
6. Before installing the new adapter, notice the notch on the right rear of
the adapter. This notch accepts the hook on the terminal base unit.
The notch is open at the bottom. The hook and adjacent connection
point keep the terminal base and the adapter tight together, reducing
the possibility of a break in communication over the backplane.
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.
C
7. Complete the adapter mounting as shown below.
Publication 1794-IN110A-EN-P - August 2005