Allen-Bradley ControlLogix 1756-OF4 User manual

Publication 1756-IN016B-EN-P - November 2003
Installation Instructions
ControlLogix Voltage/Current Output Module
Catalog Number 1756-OF4
Obtain a User Manual
This product also has a user manual (pub. no. 1756-UM009). To view
it, visit www.ab.com/manuals or www.theautomationbookstore.com.
To purchase a manual, you can:
•contact your distributor or Rockwell Automation representative
•visit www.theautomationbookstore.com and place an order
•call 800.963.9548 (USA/Canada) or 001.320.725.1574 (outside
USA/Canada)
To: See page:
Identify the Module Components 7
Note the Power Requirements 7
Install the Module 8
Key the Module and Removable Terminal Block/Interface Module 9
Wire the Removable Terminal Block 10
Wire the Module 13
Assemble the Removable Terminal Block and the Housing 15
Install the Removable Terminal Block onto the Module 15
Check the Indicators 16
Remove the Removable Terminal Block from the Module 17
Remove the Module 17
See Specifications 18
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2ControlLogix Voltage/Current Output Module
Publication 1756-IN016B-EN-P - November 2003
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.ab.com/manuals/gi) 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 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.
IMPORTAN
T
Identifies information that is critical for successful application and understanding of the
product.
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
•recognize the consequence
SHOCK HAZAR
D
Labels may be located on or inside the drive to alert people that dangerous voltage may
be present.
BURN HAZARD Labels may be located on or inside the drive to alert people that surfaces may be
dangerous temperatures.

ControlLogix Voltage/Current Output Module 3
Publication 1756-IN016B-EN-P - November 2003
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 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.
NOTE: 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.
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.
•If available, use a static-safe workstation.
•When not in use, store the equipment in appropriate static-safe packaging.
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4ControlLogix Voltage/Current Output Module
Publication 1756-IN016B-EN-P - November 2003
Removal and Insertion Under Power
Be sure that power is removed or the area is nonhazardous before
proceeding. Repeated electrical arcing causes excessive wear to
contacts on both the module and its mating connector. Worn contacts
may create electrical resistance that can affect module operation.
European Hazardous Location Approval
If you install the module in a European Zone 2 location, consider:
WARNING When you insert or remove the module while backplane
power is on, an electrical arc can occur. This could cause
an explosion in hazardous location installations.
European Zone 2 Certification (The following applies when the product bears the
EEx Marking)
This equipment is intended for use in potentially explosive atmospheres as defined by
European Union Directive 94/9/EC.
The LCIE (Laboratoire Central des Industries Electriques) certifies that this equipment has
been found to comply with the Essential Health and Safety Requirements relating to the
design and construction of Category 3 equipment intended for use in potentially explosive
atmospheres, given in Annex II to this Directive. The examination and test results are
recorded in confidential report No. 28 682 010.
Compliance with the Essential Health and Safety Requirements has been assured by
compliance with EN 50021.
IMPORTANT When using this product, also consider the following:
•This equipment is not resistant to sunlight or other sources of UV
radiation.
•The secondary of a current transformer shall not be
open-circuited when applied in Class I, Zone 2 environments.
•Equipment of lesser Enclosure Type Rating must be installed in
an enclosure providing at least IP54 protection when applied in
Class I, Zone 2 environments.
•This equipment shall be used within its specified ratings defined
by Allen-Bradley.
•Provision shall be made to prevent the rated voltage from being
exceeded by transient disturbances of more than 40% when
applied in Class I, Zone 2 environments.

ControlLogix Voltage/Current Output Module 5
Publication 1756-IN016B-EN-P - November 2003
North American Hazardous Location Approval
The following information applies
when operating this equipment in
hazardous locations:
Informations sur l’utilisation de cet
équipement en environnements
dangereux:
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.
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.
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6ControlLogix Voltage/Current Output Module
Publication 1756-IN016B-EN-P - November 2003
WARNING 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.
AVERTISSEMENT 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.
The following information applies
when operating this equipment in
hazardous locations:
Informations sur l’utilisation de cet
équipement en environnements
dangereux:

ControlLogix Voltage/Current Output Module 7
Publication 1756-IN016B-EN-P - November 2003
Identify the Module Components
You received the following components with your order:
•1756-OF4 module
•Removable Terminal Block (RTB) door label
If you did not receive these components, contact your local
distributor Rockwell Automation sales office.
This module mounts in a 1756 chassis and uses a separately-ordered
RTB or a Bulletin 1492 Interface Module (IFM)(1) to connect all
field-side wiring. This module uses one of the following RTBs:
•1756-TBNH 20 position NEMA RTB
•1756-TBSH 20 position Spring Clamp RTB
Use an extended-depth cover (1756-TBE) for applications with heavy
gauge wiring or requiring additional routing space. When using an
IFM, consult the documentation that came with it to connect wiring.
Note the Power Requirements
This module receives power from the 1756 chassis power supply and
requires 2 sources of power from the ControlLogix backplane:
•150mA at 5.1V dc
•120mA at 24V dc
Add this current/power value (3.65W) to the requirements of all other
modules in the chassis to prevent overloading the power supply.
(1) The ControlLogix system has been agency certified using the only the ControlLogix RTBs (i.e.
1756-TBCH, 1756-TBNH 1756-TBSH and 1756-TBS6H). Any application that requires agency
certification of the ControlLogix system using other wiring termination methods may require
application specific approval by the certifying agency.
IMPORTANT Before you install your module, you should:
•install and ground a 1756 chassis and power supply.
•order and receive an RTB or IFM, and its
components, for your application.
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8ControlLogix Voltage/Current Output Module
Publication 1756-IN016B-EN-P - November 2003
Install the Module
You can install or remove the module while chassis power is applied.
Be sure that power is removed or the area is nonhazardous before
proceeding. Repeated electrical arcing causes excessive wear to
contacts on both the module and its mating connector. Worn contacts
may create electrical resistance that can affect module operation.
1. Align the circuit board with the top and bottom chassis guides.
2. Slide the module into chassis until module locking tabs click.
WARNING When you insert or remove the module while backplane
power is on, an electrical arc can occur. This could cause
an explosion in hazardous location installations.
20861–M
Printed
Circuit
Board
Locking tab

ControlLogix Voltage/Current Output Module 9
Publication 1756-IN016B-EN-P - November 2003
Key the Module and Removable Terminal Block/Interface Module
Use the wedge-shaped keying tabs and U-shaped keying bands to
prevent connecting the wrong wires to your module.
Key positions on the module that correspond to unkeyed positions
on the RTB. For example, if you key the first position on the module,
leave the first position on the RTB unkeyed.
1. To key the module, insert the U-shaped band, as shown.
2. Push the band until it snaps in place.
3. To key the RTB or IFM, insert the wedge-shaped tab with
rounded edge first, as shown.
4. Push the tab until it stops.
Reposition the tabs to rekey future module applications.
20850–M
U-shaped
bands
20851–M
Wedge-shaped tab
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10 ControlLogix Voltage/Current Output Module
Publication 1756-IN016B-EN-P - November 2003
Wire the Removable Terminal Block
Wire the RTB with a 5/16 inch (8mm) maximum flat-bladed
screwdriver before installing it onto the module.
Be sure that power is removed or the area is nonhazardous before
proceeding.
Shielded cable is required when using this module.We recommend
using Belden 8761 cable to wire the RTB. The RTB terminations can
accommodate #22 - 14 AWG shielded wire.
Connect grounded end of the cable
1. Prepare one end of the cable for grounding.
2. Ground the drain wire. We recommend grounding the drain
wire at the field device as shown below.
3. Connect the insulated wires to the field device.
WARNING When you connect or disconnect the Removable
Terminal Block (RTB) while field side power is on, an
electrical arc can occur. This could cause an explosion in
hazardous location installations.
A. Remove a length
of cable jacket
from the
connecting cable.
B. Pull the foil shield
and bare drain
wire from the
insulated wire.
C. Twist the foil shield
and drain wire
together to form a
single strand.
D. Attach a ground
lug and apply heat
shrink tubing to the
exit area.
20104-M
Field
Device
Drain wire
43183