Allen-Bradley Micro820 User manual

Installation Instructions
Micro820 20-Point Programmable Controllers
Catalog Numbers 2080-LC20-20QWB, 2080-LC20-20QBB,
2080-LC20-20AWB, 2080-LC20-20QWBR,
2080-LC20-20QBBR, 2080-LC20-20AWBR
http://rockwellautomation.com/literature
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Table of Contents
Topic Page
Important User Information 2
Additional Resources 6
Overview 7
Status Indicators 8
Mount the Module 8
Wire the Controller 13
Specifications 15

2Micro820 20-Point Programmable Controllers
Publication 2080-IN009B-EN-P - April 2014
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://rockwellautomation.com/literature) 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, when necessary, 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.
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 and
recognize the consequences.
SHOCK HAZARD: Labels may be on or inside the equipment (for example, drive or motor) to alert
people that dangerous voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment (for example, drive or motor) to alert
people that surfaces may reach dangerous temperatures.
IMPORTANT
IMPORTANT: Identifies information that is critical for successful application and understanding of the
product.

Micro820 20-Point Programmable Controllers 3
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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
60664-1), at altitudes up to 2000 m (6562 ft) without derating.
This equipment is considered Group 1, Class A industrial equipment according to
IEC/CISPR 11. Without appropriate precautions, there may be difficulties with
electromagnetic compatibility in residential and other environments due to
conducted and radiated disturbances.
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 enclosure must have suitable
flame-retardant properties to prevent or minimize the spread of flame,
complying with a flame spread rating of 5VA or be approved for the application if
nonmetallic. 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.
In addition to this publication, see:
• Industrial Automation Wiring and Grounding Guidelines, Rockwell
Automation publication 1770-4.1, for additional installation requirements.
• NEMA Standard 250 and IEC 60529, as applicable, for explanations of the
degrees of protection provided by different types of enclosure.
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.
• Use a static-safe workstation, if available.
• Store the equipment in appropriate static-safe packaging when not in use.

4Micro820 20-Point Programmable Controllers
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North American Hazardous Location Approval
The following modules are North American Hazardous Location approved:
2080-LC20-20QWB, 2080-LC20-20QBB, 2080-LC20-20AWB, 2080-LC20-20QWBR,
2080-LC20-20QBBR, 2080-LC20-20AWBR
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.
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 any component 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 tout composant
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.

Micro820 20-Point Programmable Controllers 5
Publication 2080-IN009B-EN-P - April 2014
WARNING:
•If you 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 the communications cable with power applied
to this module or any device on the network, 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.
•When used in a Class I, Division 2, hazardous location, this equipment must
be mounted in a suitable enclosure with proper wiring method that
complies with the governing electrical codes.
•Exposure to some chemicals may degrade the sealing properties of
materials used in the Relays. It is recommended that the User periodically
inspect these devices for any degradation of properties and replace the
module if degradation is found.
•If you insert or remove the plug-in 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.
Refer to the Wiring Diagram for each plug-in module for additional details
regarding removal or insertion under power.
•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.
Be sure that power is removed or the area is nonhazardous before
proceeding.
ATTENTION:
•The serial cables are not to exceed 3.0 m (9.84 ft).
•Do not wire more than 2 conductors on any single terminal.
•Do not remove the Removable Terminal Block (RTB) until power is removed.

6Micro820 20-Point Programmable Controllers
Publication 2080-IN009B-EN-P - April 2014
Additional Resources
If you would like a manual, you can:
• download a free electronic version from the Internet:
http://rockwellautomation.com/literature
• purchase a printed manual by contacting your local Allen-Bradley distributor or
Rockwell Automation representative
ATTENTION:
•To comply with the CE Low Voltage Directive (LVD), this equipment must be
powered from a source compliant with the following: Safety Extra Low
Voltage (SELV) or Protected Extra Low Voltage (PELV).
•To comply with UL restrictions, this equipment must be powered from a
Class 2 or Limited Voltage Limited Current Source (LVLC).
•For Class I Division 2 applications, use only Class I Division 2 listed or
recognized accessories and modules approved for use within the Micro800®
platform.
ATTENTION:
•Electrostatic discharge can damage semiconductor devices inside the
module. Do not touch the connector pins or other sensitive area pins.
•Be careful when stripping wires. Wire fragments that fall into the controller
could cause damage. Once wiring is complete, make sure the controller is
free of all metal fragments.
•Do not connect directly to line voltage. Line voltage must be supplied by a
suitable, approved isolating transformer or power supply having short
circuit capacity not exceeding 100 VA maximum equivalent.
Resource Description
Micro820™ 20-point Programmable
Controllers User Manual, publication
2080-UM005
A more detailed description of how to install and use your
Micro820 programmable controller.
Micro800®Plug-in Modules User Manual,
publication 2080-UM004
Installation and wiring descriptions for the different Micro800
plug-in modules.
Micro800 AC Power Supply Installation
Instructions, publication 2080-IN001
Information on wiring and installing the optional AC power supply.
Micro820 Remote LCD Installation
Instructions, publication 2080-IN010
Information on wiring and installing the Micro800 Remote LCD,
2080-REMLCD.
Industrial Automation Wiring and
Grounding Guidelines, publication 1770-4.1
More information on proper wiring and grounding techniques.

Micro820 20-Point Programmable Controllers 7
Publication 2080-IN009B-EN-P - April 2014
Overview
The Micro820 20-point controller is an economical brick style controller with embedded inputs
and outputs. It can accommodate up to two plug-in modules, any 24V DC output power supply
that meets minimum specifications such as the optional Micro800 power supply,
2080-PS120-240VAC.
The Micro820 controller can also support a remote LCD (2080-REMLCD) through an
RS232 port. This remote LCD can be mounted on the same DIN rail as the controller.
Controller Overview
Controller Description
Description Description
1 Status indicators 7 Plug-in latch
2 Optional power supply panel mounting latch
hole
8 Plug-in screw hole
3 Optional power supply slot 9 microSD™ (Micro Secure Digital)
card slot
4 RS232/RS485 non-isolated combo
serial port
10 DIN rail mounting latch
5 Removable/fixed(1) terminal block
(1) Removable terminal blocks are available on modules with catalog numbers that end in R. Catalog numbers
that do not end in R have fixed terminal blocks.
11 RJ-45 Ethernet connector port
6 40-pin high speed plug-in connector 12 Optional power supply
46206
11
12345678672
9
10
5
10
12

8Micro820 20-Point Programmable Controllers
Publication 2080-IN009B-EN-P - April 2014
Status Indicators
Controller status LED indicators are located at the leftmost side of the controller, next to the
two plug-in slots.
Mount the Module
Most applications require installation in an industrial enclosure to reduce the effects of electrical
interference and environmental exposure. Locate your controller as far as possible from power
lines, load lines, and other sources of electrical noise such as hard-contact switches, relays, and
AC motor drives. For more information on proper grounding guidelines, see the Industrial
Automation Wiring and Grounding Guidelines, publication 1770-4.1.
46207
Status Indicators
Input status
Fault status
Run status
Communication status
SD status
Output status
Force status
ENET status

Micro820 20-Point Programmable Controllers 9
Publication 2080-IN009B-EN-P - April 2014
Mounting Dimensions and DIN Rail Mounting
Module Spacing
Maintain spacing from objects such as enclosure walls, wireways and adjacent equipment. Allow
50.8 mm (2.0 in.) of space on all sides for adequate ventilation. If optional accessories/modules
are attached such as the optional power supply, 2080-PS120-240VAC, make sure that there is
50.8 mm (2 in.) of space on all sides after attaching the optional parts.
DIN Rail Mounting
The module can be mounted using the following DIN rails: 35 x 7.5 mm and 35 x 15 mm (EN
50 022 - 35 x 7.5 and EN 50 022 - 35 x 15).
Before mounting the module on a DIN rail, use a flat-blade screwdriver in the DIN rail latch and
pry it downwards until it is in the unlatched position.
1. Hook the top of the DIN rail mounting area of the controller onto the DIN rail, and
then press the bottom until the controller snaps onto the DIN rail.
TIP
For environments with greater vibration and shock concerns, use the panel
mounting method, instead of DIN rail mounting.
46253
Mounting dimensions do not include mounting feet or DIN rail latches.
Measurements are in millimeters (inches).
104 (4.09) 75 (2.95)
90 (3.54)

10 Micro820 20-Point Programmable Controllers
Publication 2080-IN009B-EN-P - April 2014
2. Push the DIN rail latch back into the latched position.
To remove your controller from the DIN rail, pry the DIN rail latch downwards until it is in the
unlatched position.
Panel Mounting
The preferred mounting method is to use four M4 (#8) screws per module. Hole spacing
tolerance: ±0.4 mm (0.016 in.).
Follow these steps to install your controller using mounting screws.
1. Place the controller against the panel where you are mounting it. Make sure the
controller is spaced properly.
2. Mark drilling holes through the mounting screw holes and mounting feet then remove
the controller.
3. Drill the holes at the markings, then replace the controller and mount it. Leave the
protective debris strip in place until you have finished wiring any other devices.
Panel Mounting Dimensions
46204
86 mm
(3.39 in.)
100 mm
(3.94 in.)