Allen-Bradley ControlLogix 1756-IF4FXOF2F User manual

Publication 1756-IN004A-EN-P - February 2002
Installation Instructions
ControlLogix
High Speed Analog I/O Module
Catalog Number 1756-IF4FXOF2F
Obtain a User Manual
This product also has a user manual (pub. no. 1756-UM005). 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:
Obtain a User Manual 1
Identify the ModuleComponents 6
Prevent Electrostatic Discharge 5
Note the Power Requirements 7
Install the Module 7
Key the Removable Terminal Block/Interface Module 8
Wire the Module 11
Assemble the Removable Terminal Block and the Housing 13
Install the Removable TerminalBlock onto the Module 13
Checkthe Indicators 14
Remove the Removable Terminal Block from the Module 15
Remove the Module 15
See 1756-IF4FXOF2FSpecifications 16
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2ControlLogix High Speed Analog I/O Module
Publication 1756-IN004A-EN-P - February 2002
Important User Information
Because of the variety of uses for the products described in this
publication, those responsible for the application and use of these
products must satisfy themselves that all necessary steps have been
taken to assure that each application and use meets all performance
and safety requirements, including any applicable laws, regulations,
codes and standards. In no event will Allen-Bradley be responsible
or liable for indirect or consequential damage resulting from the use
or application of these products.
Any illustrations, charts, sample programs, and layout examples
shown in this publication are intended solely for purposes of
example. Since there are many variables and requirements associated
with any particular installation, Allen-Bradley does not assume
responsibility or liability (to include intellectual property liability) for
actual use based upon the examples shown in this publication.
Allen-Bradley publication SGI-1.1, Safety Guidelines for the
Application, Installation and Maintenance of Solid-State Control
(available from your local Allen-Bradley office), describes some
important differences between solid-state equipment and
electromechanical devices that should be taken into consideration
when applying products such as those described in this publication.
Reproduction of the contents of this copyrighted publication, in
whole or part, without written permission of Rockwell Automation, is
prohibited.

ControlLogix High Speed Analog I/O Module 3
Publication 1756-IN004A-EN-P - February 2002
Throughout this publication, notes may be used to make you aware
of safety considerations. The following annotations and their
accompanying statements help you to identify a potential hazard,
avoid a potential hazard, and recognize the consequences of a
potential hazard:
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.
IMPORTANT
Identifies information that is critical for
successful application and understanding of the
product.
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4ControlLogix High Speed Analog I/O Module
Publication 1756-IN004A-EN-P - February 2002
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
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.

ControlLogix High Speed Analog I/O Module 5
Publication 1756-IN004A-EN-P - February 2002
Prevent Electrostatic Discharge
Removal and Insertion Under Power
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.
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. Be sure that
power is removed or the area is nonhazardous
before proceeding.
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6ControlLogix High Speed Analog I/O Module
Publication 1756-IN004A-EN-P - February 2002
Identify the Module Components
You received the following components with your order:
•1756-IF4FXOF2F 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 ControlLogixchassis and uses a
separately-ordered RTB or a Bulletin 1492 Interface Module (IFM) to
connect all field-side wiring.
This module uses one of the following RTBs:
•1756-TBCH 36 position Cage clamp RTB
•1756-TBS6H 36 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
all wiring.
IMPORTANT Before you install your module, you should
have already:
•installed and grounded a 1756 chassis and
power supply.
•ordered and received an RTB or IFM and its
components for your application.

ControlLogix High Speed Analog I/O Module 7
Publication 1756-IN004A-EN-P - February 2002
Note the Power Requirements
This module receives power from the 1756 chasis power supply and
requires 2 sources of power from the backplane:
•375mA at 5.1V dc
•100mA at 24V dc
Add this current/power value (4.3W) to the requirements of all other
modules in the chassis to prevent overloading the power supply.
Install the Module
You can install or remove the module while chassis power is applied.
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. Be sure that
power is removed or the area is nonhazardous
before proceeding.
20861–M 20862–M
1. Align circuit board with top and
bottom chassis guides. 2. Slide module into chassis until module locking tabs ‘click’.
Printed
Circuit
Board
Locking tab
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8ControlLogix High Speed Analog I/O Module
Publication 1756-IN004A-EN-P - February 2002
Key the 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.
Reposition the tabs to rekey future module applications.
Wire the Removable Terminal Block
Wire the RTB with a 1/8 inch (3.2mm) maximum flat-bladed
screwdriver before installing it onto the module. Shielded cable is
required when using this module.
We recommend using Belden 8761 cable to wire the RTB. The RTB
terminations can accommodate 14-22 gauge shielded wire.
WARNING
!
When you connect or disconnect the Removable
Terminal Block (RTB) with field side power
applied, an electrical arc can occur. This could
cause an explosion in hazardous location
installations. Make sure that power is removed or
the area is nonhazardous before proceeding.
20850–M
1. Insert the U-shaped bandas shown.
2. Push the banduntil it snaps in place.
U-shaped
bands
1. Insert the wedge-shaped tab with rounded edge first.
2. Push thetab until it stops.
20851–M
Wedge-shaped tab
Key the Module Key the RTB/IFM

ControlLogix High Speed Analog I/O Module 9
Publication 1756-IN004A-EN-P - February 2002
Connect grounded endof the cable
Ground one end of the cable only. Follow the steps below.
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.
If you cannot ground at the field device, follow these steps:
1. Prepare one end of the cable as shown in step 1.
2. Ground at an earth ground on the chassis as shown below.
3. Connect the insulated wires to the RTB.
a. Removea length
of cable jacket
from the
connecting cable.
b. Pullthefoilshield
and bare drain
wire from the
insulated wire.
c. Twistthefoilshield
and drain wire
together to form a
single strand.
d. Attachagroundlug
and apply heat
shrinktubingtothe
exit area.
20104-M
Field
Device
Drain wire
43183
20918-M
Connect the drain wire to a
chassis mounting tab.
Use any chassis mounting tab
that isdesignated asa
functional signal ground.
Chassis mounting tab
Drain wire with ground lug
4M or 5M (#10 or #12)
phillips screw and star
washer (or SEM screw)
4M or 5M (#10 or #12)
star washer
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10 ControlLogix High Speed Analog I/O Module
Publication 1756-IN004A-EN-P - February 2002
Connect ungrounded endof the cable
1. Prepare the non-grounded end of the cable.
2. Connect the insulated wires to:
•the RTB (as shown below) if the cable is grounded at the
field device.
or
•the field device if the cable is grounded at the chassis.
a. Remove a length
of cable jacket
from the
connecting cable.
b. Pullthefoilshield
and bare drain
wire from the
insulated wire.
c. Cutthefoilshieldanddrain
wire back to the cable
casing and apply shrink
wrap, exposing only the
insulated wires.
43182
Spring Clamp RTB Cage Clamp RTB
20860-M 20859-M
A. Strip 7/16 inch (11mm) maximumlength
of wire.
B. Insert thescrewdriver into the inner hole
of the RTB.
C. Insert the wire intothe open
terminal and remove the
screwdriver.
A. Strip 3/8 inch (9.5mm) maximumlength
of wire.
B. Insert the wire into the open terminal.
C. Turn the screw clockwise to close the
terminal on the wire.