Allen-Bradley CompactLogix 1769-L20 User manual

Publication 1769-IN047C-EN-P - April 2003
Installation Instructions
1769-L20, 1769-L30 CompactLogix™ Controllers
(Cat. No. 1769-L20, 1769-L30)
Inside...
Before You Begin .................................................................................... 2
For More Information.............................................................................. 2
European Communities (EC) Directive Compliance ................................ 4
Hazardous Location Considerations ....................................................... 5
CompactLogix Controller Description ..................................................... 6
System Planning ..................................................................................... 6
Install the Controller ............................................................................... 7
Connect the Battery ................................................................................ 8
Assemble the System ............................................................................. 9
Mount the System ................................................................................ 10
Grounding Considerations .................................................................... 12
Select the Controller’s Operating Mode ............................................... 12
RS-232 Connections to the Controller .................................................. 13
Default Communication Configuration ................................................. 14
Using the Channel 0 Default Communication Push Button .................. 15
Troubleshoot the Controller Using the LEDs......................................... 16
Flash Upgrade the Controller Firmware................................................ 17
Specifications ....................................................................................... 18
Dimensions ........................................................................................... 19
Battery Handling, Storing, and Transporting ........................................ 20

21769-L20, 1769-L30 CompactLogix™ Controllers
Publication 1769-IN047C-EN-P - April 2003
Before You Begin
Use this document as a guide for installing and powering-up your 1769-L20, -L30
CompactLogix controller system. You should already be familiar with the
CompactLogix system components.
You must FLASH upgrade the firmware on your CompactLogix controller before
you can use it. The controller ships with firmware revision 1.x but must be
upgraded to match the version of RSLogix 5000 that you are using (e.g. if you are
using RSLogix 5000 V11, you must upgrade your CompactLogix controller firmware
to revision 11.x before using it. For more information on upgrading your
controller’s firmware, see page 17.
For More Information
If you would like a manual, you can obtain it as follows:
·download a free electronic version from the internet:
www.theautomationbookstore.com
·purchase a printed manual by:
–contacting your local distributor or Rockwell Automation representative
–visiting www.theautomationbookstore.com and placing your order
–calling 1.800.963.9548 (USA/Canada)
or 001.330.725.1574 (Outside USA/Canada)
For Information on Refer to this Document Pub. No.
How to use 1769-L20, -L30 CompactLogix™
controllers
CompactLogix™ System User Manual 1769-UM007
Programming the controller Logix5000™ Controllers Common
Procedures Programming Manual
1756-PM001
General instructions Logix5000 Controller General
Instructions Reference Manual
1756-RM003
Process control and drives instructions Logix5000 Controller Process Control
and Drives Instructions Reference
Manual
1756-RM006
Installing and operating Compact power
supplies
Compact™ 1769 Expansion I/O Power
Supplies Installation Instructions
1769-IN028
Installing and operating Compact I/O Compact 1769 Expansion I/O Installation Instructions for your
particular module
Installing and operating Compact I/O
analog modules
Compact 1769 I/O Analog Modules
User Manual
1769-UM002
How to use the 1769-ADN DeviceNet
adapter module
DeviceNet Adapter Module User
Manual
1769-UM001
Proper wiring and grounding techniques. Industrial Automation Wiring and
Grounding Guidelines
1770-4.1

1769-L20, 1769-L30 CompactLogix™ Controllers 3
Publication 1769-IN047C-EN-P - April 2003
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 Rockwell Automation 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, Rockwell Automation 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 Rockwell Automation 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.
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.

41769-L20, 1769-L30 CompactLogix™ Controllers
Publication 1769-IN047C-EN-P - April 2003
European Communities (EC) Directive Compliance
If this product has the CE mark it is approved for installation within the European
Union and EEA regions. It has been designed and tested to meet the following
directives.
EMC Directive
This product is tested to meet the Council Directive 89/336/EC Electromagnetic
Compatibility (EMC) by applying the following standards, in whole or in part,
documented in a technical construction file:
·EN 50081-2 EMC — Generic Emission Standard, Part 2 — Industrial
Environment
·EN 50082-2 EMC — Generic Immunity Standard, Part 2 — Industrial
Environment
This product is intended for use in an industrial environment.
Low Voltage Directive
This product is tested to meet Council Directive 73/23/EEC Low Voltage, by
applying the safety requirements of EN 61131-2 Programmable Controllers, Part 2 -
Equipment Requirements and Tests. For specific information required by
EN 61131-2, see the appropriate sections in this publication, as well as the
Allen-Bradley publication Industrial Automation Wiring and Grounding Guidelines
For Noise Immunity, publication 1770-4.1. and the Automation Systems Catalog,
publication B111.
This equipment is classified as open equipment and must be mounted in an
enclosure during operation to provide safety protection.

1769-L20, 1769-L30 CompactLogix™ Controllers 5
Publication 1769-IN047C-EN-P - April 2003
Hazardous Location Considerations
This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or
non-hazardous locations only. The following WARNING statement applies to use in
hazardous locations.
Environnements dangereux
Cet équipement est conçu pour être utilisé dans des environnements de Classe 1,
Division 2, Groupes A, B, C, D ou non dangereux. La mise en garde suivante
s’applique à une utilisation dans des environnements dangereux.
!
WARNING EXPLOSION HAZARD
·Substitution of components may impair suitability for Class
I, Division 2.
·Do not replace components or disconnect equipment
unless power has been switched off or the area is known
to be non-hazardous.
·Do not connect or disconnect components unless power
has been switched off or the area is known to be
non-hazardous.
·This product must be installed in an enclosure. All cables
connected to the product must remain in the enclosure or
be protected by conduit or other means.
·All wiring must comply with N.E.C. article 501-4(b).
AVERTISSEMENT
!
DANGER D’EXPLOSION
·La substitution de composants peut rendre cet équipement
impropre à une utilisation en environnement de Classe 1,
Division 2.
·Ne pas remplacer de composants ou déconnecter
l'équipement sans s'être assuré que l'alimentation est
coupée et que l'environnement est classé non dangereux.
·Ne pas connecter ou déconnecter des composants sans
s'être assuré que l'alimentation est coupée ou que
l'environnement est classé non dangereux.
·Ce produit doit être installé dans une armoire.

61769-L20, 1769-L30 CompactLogix™ Controllers
Publication 1769-IN047C-EN-P - April 2003
CompactLogix Controller Description
System Planning
Consider the following when planning your CompactLogix system:
·The CompactLogix controller is always the left-most module in the system.
·The controller must be located within four modules of the system power
supply. Some I/O module’s may be located up to 8 modules away from the
power supply. See the documentation for your 1769 I/O modules for details.
·The 1769-L20 controller supports up to 8 I/O modules in a maximum of 2
I/O banks (1 expansion cable allowed).
·The 1769-L30 controller supports up to 16 I/O modules in a maximum of 3
I/O banks (2 expansion cables allowed).
·Each I/O bank requires its own power supply.
·Only one controller can be used in a CompactLogix system.
·A 1769-ECR (right end cap) or 1769-ECL (left end cap) is required to
terminate the end of the communication bus.
1 DIN rail latch 8 Channel 0 RS-232 Port
2 panel mounting tab 9 Channel 0 default communication push button
3 tongue and groove slots 10 Channel 1 RS-232 Port
4 stationary bus connector 11 Channel 1 RS-232 Port Status LED
5 status LEDs 12 battery door
6 key switch 13 battery door label
7 Channel 0 RS-232 Port Status LED 14 battery(1)
(1) See Connect the Battery on page 8 for the actual position of the battery.
15 battery connector
1
12
23
3
4
5
6
7
8
7
8
99
10
14
15
12
13
11
1769-L20 controller 1769-L30 controller

1769-L20, 1769-L30 CompactLogix™ Controllers 7
Publication 1769-IN047C-EN-P - April 2003
Install the Controller
The 1769-L20 and 1769-L30 controllers are suitable for use in an industrial
environment when installed in accordance with these instructions. Specifically, this
equipment is intended for use in clean, dry environments (Pollution Degree 2(1))
and with circuits not exceeding Over Voltage Category II(2) (IEC 60664-1).(3)
Prevent Electrostatic Discharge
Remove Power
(1) Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that occasionally a
temporary conductivity caused by condensation shall be expected.
(2) Over Voltage Category II is the load level section of the electrical distribution system. At this level transient voltages are
controlled and do not exceed the impulse voltage capability of the product’s insulation.
(3) Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC) designations.
ATTENTION
!
Electrostatic discharge can damage integrated circuits or
semiconductors if you touch bus connector pins. Follow these
guidelines when you handle the module:
·Touch a grounded object to discharge static potential.
·Wear an approved wrist-strap grounding device.
·Do not touch the bus connector or connector pins.
·Do not touch circuit components inside the module.
·If available, use a static-safe work station.
·When not in use, keep the module in its static-shield bag.
ATTENTION
!
Remove power before removing or inserting this module.
When you remove or insert a module with power applied, an
electrical arc may occur. An electrical arc can cause personal
injury or property damage by:
·sending an erroneous signal to your system’s field devices,
causing unintended machine motion
·causing an explosion in a hazardous environment
Electrical arcing causes excessive wear to contacts on both the
module and its mating connector. Worn contacts may create
electrical resistance.

81769-L20, 1769-L30 CompactLogix™ Controllers
Publication 1769-IN047C-EN-P - April 2003
Connect the Battery
The controller is shipped with the battery packed separately. To connect the
battery, follow the procedure shown below.
1. Slide the battery door (a) forward.
2. Insert the battery (b) into the battery holder. Insert the battery connector into
the connector port (c). The connector is keyed to engage only in the
correct polarity.
3. Slide the battery door (a) back until it clicks into position.
For information on battery handling, see page 20.
ATTENTION
!
Do not connect or disconnect the battery unless the
environment is known to be non-hazardous.
IMPORTANT Do not remove the plastic insulation covering the battery. The
insulation is necessary to protect the battery contacts.
b
a
c
b
a
c
1769-L20 controller 1769-L30 controller

1769-L20, 1769-L30 CompactLogix™ Controllers 9
Publication 1769-IN047C-EN-P - April 2003
Assemble the System
The controller can be attached to an adjacent I/O module or power supply before
or after mounting. For mounting instructions, see “Panel Mounting” on page 10, or
“DIN Rail Mounting” on page 11.
1. Disconnect line power.
2. Check that the lever of the adjacent module (A) is in the unlocked (fully
right) position.
3. Use the upper and lower tongue-and-groove slots (B) to secure the modules
together.
4. Move the module back along the tongue-and-groove slots until the bus
connectors line up with each other.
5. Use your fingers or a small screwdriver to push the module’s bus lever back
slightly to clear the positioning tab (C).
6. Move the module’s bus lever fully to the left (D) until it clicks. Ensure it is
locked firmly in place.
7. Attach an end cap terminator (E) to the last module in the system by using
the tongue-and-groove slots as before.
8. Lock the end cap bus terminator (F).
ATTENTION
!
When attaching the controller, power supply, and I/O
modules, it is very important that the bus connectors are
securely locked together to ensure proper electrical
connection.
F
E
D
C
B
B
A

10 1769-L20, 1769-L30 CompactLogix™ Controllers
Publication 1769-IN047C-EN-P - April 2003
Mount the System
Minimum Spacing
Maintain spacing from
enclosure walls,
wireways, adjacent
equipment, etc. Allow 50
mm (2 in.) of space on all
sides, as shown. This
provides ventilation and
electrical isolation.
Panel Mounting
Mount the controller to a panel using two screws per module. Use M4 or #8
panhead screws. Mounting screws are required on every module.
Panel Mounting Using the Dimensional Template
ATTENTION
!
During panel or DIN rail mounting of all devices, be sure that
all debris (metal chips, wire strands, etc.) is kept from falling
into the controller. Debris that falls into the controller could
cause damage while the controller is energized.
Bottom
Side Side
Top
CompactLogix
Controller
Power Supply
Compact I/O
Compact I/O
End Cap
50 mm
50 mm
50 mm
50 mm
35
(1.38)
35
(1.38)
132
(5.197)
122.6±0.2
(4.826±0.008)
35
(1.38)
28.5
(1.12)
25
(.985)
15
(.590)
35
(1.38)
CompactLogix Controller
Power Supply
Compact I/O Compact I/O
End Cap
NOTE: All dimensions are in mm (in.).
Hole spacing tolerance: ±0.4 mm (0.016 in.)
battery door