Allen-Bradley ControlLogix 1756-PA75/B User manual

Publication 1756-IN596A-EN-P - December 2004
Installation Instructions
ControlLogix Power Supplies
Catalog Numbers 1756-PA75/B, 1756-PB75/B
Use this publication when installing the ControlLogix™ power supplies.
You mount a non-redundant power supply directly on the left end of the
ControlLogix chassis, where it plugs directly into the backplane. The power supply
provides power for all modules installed in the chassis.
For more information on: See page:
Environment and Enclosure 3
Prevent Electrostatic Discharge 3
North American Hazardous Location Approval 5
Preparing for Installation 7
Installing the Power Supply 7
Connecting Equipment Protective Earth Ground 9
Verifying Grounding Configuration 10
Connecting Power 11
Removing the Protective Label 12
Activate the Power Supply 12
Understanding Input Power Requirements and Transformer Sizing 13
Troubleshooting the Power Supply 14
Specifications 15

2ControlLogix Power Supplies
Publication 1756-IN596A-EN-P - December 2004
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.
IMPORTANT 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 HAZARD 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 Power Supplies 3
Publication 1756-IN596A-EN-P - December 2004
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.

4ControlLogix Power Supplies
Publication 1756-IN596A-EN-P - December 2004
European Hazardous Location Approval
If you install the module in a European Zone 2 location, consider:
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 Power Supplies 5
Publication 1756-IN596A-EN-P - December 2004
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.

6ControlLogix Power Supplies
Publication 1756-IN596A-EN-P - December 2004
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 Power Supplies 7
Publication 1756-IN596A-EN-P - December 2004
Preparing for Installation
Before you attempt to install the power supply, make sure you have the
following items:
•1/8” slotted screwdriver
•1/4” slotted (#2) or phillips screwdriver
•torque screwdriver
•needle-nose pliers
•crimping tool
Installing the Power Supply
Do these tasks to install the power supply:
1. Verify that you are using the power supply on a ControlLogix Series B
chassis.
2. Align the power supply circuit board with the card guides on the left side of
the Series B chassis.
Figure 1
20264a-M

8ControlLogix Power Supplies
Publication 1756-IN596A-EN-P - December 2004
3. Guide the extended tab on the power supply circuit board into the notch of
the Series B chassis.
Figure 2
4. Slide the power supply in until it is flush with the back of the chassis.
Figure 3
5. Fasten the power supply to the chassis.
Figure 4
43614
Notch
44144
44145

ControlLogix Power Supplies 9
Publication 1756-IN596A-EN-P - December 2004
Connecting Equipment Protective Earth Ground
Use Figure 5 to connect equipment protective earth ground from the power supply
to the chassis. Tighten the nut on the equipment protective earth ground terminal
stud to a torque of 12 inch-pounds (1.4Nm).
Figure 5
Equipment grounding
conductor (ground lug with
2.1 sq. mm [14 AWG] wire)
protective earth ground
from chassis to ground bus
Equipment grounding
conductor (ground lug with
2.1 sq. mm [14 AWG] wire)
protective earth ground
from chassis to ground bus
Wiring terminal block
Protective earth ground
terminal stud
Nut with captive
star washer
Nut with captive
star washer 44146

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Publication 1756-IN596A-EN-P - December 2004
Verifying Grounding Configuration
Figure 6 shows you how to run functional and equipment protective earth ground
connections from the chassis and power supply to the ground bus. Using a ground
bus is recommended because it reduces the electrical resistance at the connection.
Figure 6
For more information on installing and connecting protective earth ground to the
ControlLogix chassis, refer to the ControlLogix Chassis–Series B Installation
Instructions, publications 1756-IN080.
Keep wire lengths as
short as possible.
20231a-M
Earth Ground

ControlLogix Power Supplies 11
Publication 1756-IN596A-EN-P - December 2004
Connecting Power
Use #14 AWG 75°C copper wire to connect power. Follow these steps for each wire
(i.e. high side, low side and ground) to connect power:
1. Turn the screw counterclockwise to open the wiring terminal.
2. Insert the wire into the terminal.
3. Turn the screw clockwise to tighten the terminal on the wire.
Figure 7
4. Tighten the terminals to a torque of 7 inch-pounds (0.8Nm).
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.
43894
1756-PA75/B
43632
1756-PB75/B
L1 - high side of line power
L2/N - low side of line power
+ – high side of line power
- – low side of line power
IMPORTANT: The third
terminal from the top is
not used on the
1756-PA75 or 1756-PB75
power supply.

12 ControlLogix Power Supplies
Publication 1756-IN596A-EN-P - December 2004
Removing the Protective Label
Remove the plastic label from the top of the power supply.
Figure 8
Activate the Power Supply
Flip the power switch up to turn the supply on.
Figure 9
ATTENTION Make sure the chassis is mounted and all panel fabrication is
complete before you remove the protective label. This label
protects the power supply from metal shavings falling inside the
power supply and damaging it during operation.
20264b-M
43615

ControlLogix Power Supplies 13
Publication 1756-IN596A-EN-P - December 2004
Understanding Input Power Requirements and
Transformer Sizing
Use the graphs in Figure 10 to determine the input power requirements for the
supplies, given the power they are providing to the modules in the chassis. The
vertical axis of each graph shows the backplane power consumed by all of the
modules in the chassis; the horizontal axis shows input power requirements of the
power supply. To use the graphs:
1. Add all of the backplane power (i.e. watts) for all of the modules in the
chassis.
2. Find the number from step 1 on the vertical axis.
3. Follow that value to the right until it intersects the line on the graph.
4. Find the associated input power rating consumed by the power supply on
the horizontal axis.
For example, if the power consumption of all of the modules in the chassis is 30
watts, a 1756-PB75/B consumes approximately 40 watts of Real Power.
Figure 10
43895
1756-PA75/B (ac)
1756-PB75/B (dc)
43896
backplane power
load (Watts)
real power (Watts)
backplane power
load (Watts)
apparent power (Watts) = transformer load (VA) = real power (Watts)

14 ControlLogix Power Supplies
Publication 1756-IN596A-EN-P - December 2004
Troubleshooting the Power Supply
ControlLogix power supplies have a green LED status indicator that remains ON
during normal operation.
Figure 11
If the indicator turns OFF during operation, follow these steps:
1. Verify that the line voltage is within the specified range.
2. If the indicator remains OFF, cycle line power OFF.
3. Loosen the screws holding the power supply to the chassis, as described in
step 5 on page 8.
4. Slide the power supply out so that the rear connector is disconnected.
5. Reapply input power.
6. If the indicator:
•turns ON:
a. Verify that the module loads in the system are within the output
rating of the power supply.
b. Power down the power supply.
c. Reinstall the power supply in the chassis.
•turns OFF, return the power supply to your local Rockwell Automation
distributor.
44148
LED status indicator

ControlLogix Power Supplies 15
Publication 1756-IN596A-EN-P - December 2004
Specifications
Cat. No. 1756-PA75/B 1756-PB75/B
Mounting Location Left side of ControlLogix chassis
Chassis Compatibility Series B
Input Voltage Range 85…265V ac 18…32V dc(7)
Input Voltage, Nom. 120V/220V ac 24V dc
Input Frequency Range 47…63 Hz dc
Input Power, Max. 100VA/100 W 95 W
Output Power, Max.(1) 75 W @ 60 °C
Power Dissipation 25 W @ 60 °C 20 W @ 60 °C
Power Consumption 85.3 BTU/hr 68.2 BTU/hr
Hold Up Time(2) 5 cycles @ 85V ac, 50/60 Hz
6 cycles @ 120V ac, 50/60 Hz
6 cycles @ 200V ac, 50/60 Hz
6 cycles @ 240V ac, 50/60 Hz
35 ms @ 18V dc
40 ms @ 24V dc
40 ms @ 32V dc
Inrush Current, Max. 20 A 30 A
Current Capacity, @ 1.2V 1.5 A
Current Capacity, @ 3.3V 4 A
Current Capacity, @ 5.1V 13 A
Current Capacity, @ 24V 2.8 A
Overcurrent Protection, Max.(3) 15 A, user-supplied
Internal Fuse Protection(4) Non-replaceable fuse is soldered in place
Isolation voltage (continuous-voltage
withstand rating)
250 V continuous
Conductors, Wire Size #14 AWG
Conductors, Wire Type Copper
Conductors, Category 1(6)
Conductor Screw Torque, Imperial 7 in·lb
Conductor Screw Torque, Metric 0.8 N·m
Dimensions (H x W x D), Imperial 5.51 x 4.41 x 5.71 in
Dimensions (H x W x D), Metric 140 x 112 x 145 mm
Weight, Imperial 2.5 lb
Weight, Metric 1.1 kg

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Environmental Conditions
Operational Temperature IEC 60068-2-1 (Test Ad, Operating Cold),
IEC 60068-2-2 (Test Bd, Operating Dry Heat),
IEC 60068-2-14 (Test Nb, Operating Thermal Shock):
0 to 60°C (32 to 140°F)
Storage Temperature IEC 60068-2-1 (Test Ab, Un-packaged Non-operating Cold),
IEC 60068-2-2 (Test Bb, Un-packaged Non-operating Dry Heat),
IEC 60068-2-14 (Test Na, Un-packaged Non-operating Thermal
Shock):
-40 to 85°C (-40 to 185°F)
Relative Humidity IEC 60068-2-30 (Test Db, Un-packaged Non-operating Damp Heat):
5 to 95% non-condensing
Vibration IEC 60068-2-6 (Test Fc, Operating):
5g @ 10-500Hz
Operating Shock IEC 60068-2-27 (Test Ea, Unpackaged Shock):
30g
Non-operating Shock IEC 60068-2-27 (Test Ea, Unpackaged Shock):
50g
Emissions CISPR 11:
Group 1, Class A
ESD Immunity IEC 61000-4-2:
6kV contact discharges
8kV air discharges
Radiated RF Immunity IEC 61000-4-3:
10V/m with 1kHz sine-wave 80%AM from 30MHz to 2000MHz
10V/m with 200Hz 50% Pulse 100%AM at 900Mhz
10V/m with 200Hz 50% Pulse 100%AM at 1890Mhz
EFT/B Immunity IEC 61000-4-4:
±4kV at 5kHz on power ports
Surge Transient Immunity IEC 61000-4-5:
±1kV line-line(DM) and ±2kV line-earth(CM) on power ports
Conducted RF Immunity IEC 61000-4-6:
10Vrms with 1kHz sine-wave 80%AM from 150kHz to 80MHz
Oscillatory Surge Withstand IEEE C37.90.1:
3kV
Enclosure Type Rating None (open-style)
Cat. No. 1756-PA75/B 1756-PB75/B

ControlLogix Power Supplies 17
Publication 1756-IN596A-EN-P - December 2004
Voltage Variation IEC 61000-4-11:
30% dips for 1 period at 0° &
180° on AC supply ports
60% dips for 5 & 50 periods on
AC supply ports
±10% fluctuations for 15min on
AC supply ports
>95% interuptions for 250
periods on AC supply ports
IEC 61000-4-11:
60% dips for 100ms on DC
supply ports
100% dips for 50ms on DC
supply ports
±20% fluctuations for 15min on
DC supply ports
5sec interruptions on DC supply
ports
Certifications:(5)
(when product is marked)
UL UL Listed Industrial Control Equipment
CSA CSA Certified Process Control Equipment
CSA CSA Certified Process Control Equipment for Class I,
Division 2 Group A,B,C,D Hazardous Locations
FM FM Approved Equipment for use in Class I Division 2
Group A,B,C,D Hazardous Locations
CE European Union 89/336/EEC EMC Directive, compliant
with:
EN 50082-2; Industrial Immunity
EN 61326; Meas./Control/Lab., Industrial
Requirements
EN 61000-6-2; Industrial Immunity
EN 61000-6-4; Industrial Emissions
European Union 73/23/EEC LVD Directive, compliant
with:
EN 61131-2; Programmable Controllers B
(1756-PA75 only)
C-Tick Australian Radiocommunications Act, compliant with:
AS/NZS CISPR 11; Industrial Emissions
EEx European Union 94/9/EC ATEX Directive, compliant with:
EN 50021; Potentially Explosive Atmospheres,
Protection "n" (Zone 2)
when conformal coated (1756-PA75 only)
(1) The combination of all output power (5.1V backplane, 24V backplane, 3.3V backplane and 1.2V backplane) cannot exceed
75W.
(2) Time between input voltage removal and dc power failure.
(3) Use time-delay type overcurrent protection in all ungrounded conductors.
(4) This fuse is intended to guard against fire hazard due to short circuit conditions.
(5) See the Product Certification link at www.ab.com for Declarations of Conformity, Certificates, and other certification details.
(6) Use this Conductor Category information for planning conductor routing. Refer to Publication 1770-4.1, "Industrial
Automation Wiring and Grounding Guidelines".
(7) Input may drop to 16V for a maximum of two minutes each hour for motor starting.
Cat. No. 1756-PA75/B 1756-PB75/B

18 ControlLogix Power Supplies
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Notes:

ControlLogix Power Supplies 19
Publication 1756-IN596A-EN-P - December 2004
Notes:

Publication 1756-IN596A-EN-P - December 2004 PN 957867-17
Copyright © 2004 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.
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If you experience a problem with a hardware module within the first 24 hours of installation,
please review the information that's contained in this manual. You can also contact a special
Customer Support number for initial help in getting your module up and running.
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