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Installation Instructions
MicroLogix 1762-OB8 Solid-State 24V DC Source
Output Module
Catalog Number 1762-OB8
Table of Contents
Top ic Page
Description 3
Installation 4
Mounting 5
System Assembly 7
Field Wiring Connections 8
I/O Memory Mapping 10
Specifications 11
North American Hazardous Location Approval 14
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2 MicroLogix 1762-OB8 Solid-State 24V DC Source Output Module
For More Information
Resource Description
MicroLogix 1200 Programmable Controllers User
Manual, publication
MicroLogix 1200 Programmable Controllers
Installation Instructions, publication
MicroLogix 1200 Memory Module and/or Real Time
Clock Installation Instructions, publication
1762- IA8 120V AC Input Module Installation
Instructions, publication 1762-IN002.
1762-OW8 Relay Output Module, publication
1762-IN003.
1762-IQ8 DC Input Module Installation Instructions,
publication 1762-IN004.
1762-IF2OF2 Analog Input/Output Module Installation
Instructions, publication 1762-IN005.
1762-OA8 Solid-State Output Module, publication
1762-IN007.
Industrial Automation Wiring and Grounding
Guidelines, publication 1770-4.1.
1762-UM001.
1762-IN006.
1762-IN001.
If you would like a manual, you can:
• download a free electronic version from the Internet:
http://literature.rockwellautomation.com
• purchase a printed manual by contacting your local Allen-Bradley distributor or
Rockwell Automation representative
Information on installing, wiring, and operating a
MicroLogix 1200 Programmable Controller
Installation guide for the MicroLogix 1200
Programmable Controller.
Installation guide for the MicroLogix 1200 Memory
Module and Real Time Clock.
Installation guide for the 1762-IA8 Discrete Input
Module
Installation guide for the 1762-OW8 Relay Output
Module
Installation guide for the 1762-IQ8 Discrete Input
Module
Installation guide for the 1762-IF2OF2 Analog I/O
Module
Installation guide for the 1762-OA8 Solid-State Output
Module
More information on proper wiring and grounding
techniques.
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Description
1a
7
6
MicroLogix 1762-OB8 Solid-State 24V DC Source Output Module 3
9
3
1b
4
Item Description Item Description
1a upper panel mounting tab 5 bus connector cover
1b lower panel mounting tab 6 flat ribbon cable with bus connector
2 I/O diagnostic LEDs 7 terminal block
3 module door with terminal identification
label
4 bus connector with male pins 9 pull loop
2
8 DIN rail latch
5
1a
6
8
(female pins)
2
1b
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4 MicroLogix 1762-OB8 Solid-State 24V DC Source Output Module
ATTENTION
ATTENTION
Installation
1762 I/O is 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
60664-1).
(3)
Prevent Electrostatic Discharge
Remove Power
(1)
) and to circuits not exceeding Over Voltage Category II
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 box.
(2)
(IEC
(1) Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that occasionally a
(2) Over Voltage Category II is the load level section of the electrical distribution system. At this level transient voltages are
(3) Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC) designations.
Publication 1762-IN008B-EN-P - July 2013
Remove power before removing or installing this module. When you
remove or install 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
• causing permanent damage to the module’s circuitry
Electrical arcing causes excessive wear to contacts on both the module and
its mating connector. Worn contacts may create electrical resistance.
temporary conductivity caused by condensation shall be expected.
controlled and do not exceed the impulse voltage capability of the product’s insulation.
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MicroLogix 1762-OB8 Solid-State 24V DC Source Output Module 5
ATTENTION
TIP
ATTENTION
MicroLogix
1200
1762 I/O
1762 I/O
1762 I/O
Side
Side
Top
Bottom
Mounting
Do not remove protective debris strip until after the module and all other
equipment near the module is mounted and wiring is complete. Once
wiring is complete and the module is free of debris, carefully remove
protective debris strip. Failure to remove strip before operating can cause
overheating.
Minimum Spacing
Maintain spacing from
enclosure walls, wireways,
adjacent equipment, etc.
Allow 50.8 mm (2 in.) of
space on all sides for adequate
ventilation, as shown:
1762 expansion I/O may be mounted horizontally only.
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 module.
Debris that falls into the module could cause damage when power is
applied to the module.
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6 MicroLogix 1762-OB8 Solid-State 24V DC Source Output Module
TIP
End Anchor
End Anchor
90
(3.54)
100
(3.94)
40.4
(1.59)
40.4
(1.59)
14.5
(0.57)
For more than two modules: (number of modules - 1) x 40.4 mm (1.59 in.)
NOTE: All dimensions are in mm (inches).
Hole spacing tolerance: ±0.4 mm (0.016 in.).
MicroLogix 1200
Controller
MicroLogix 1200
Expansion I/O
MicroLogix 1200
Expansion I/O
MicroLogix 1200
Expansion I/O
DIN Rail Mounting
The module can be mounted using the following DIN rails: 35 x 7.5 mm
(EN 50 022 - 35 x 7.5) or 35 x 15 mm (EN 50 022 - 35 x 15).
Before mounting the module on a DIN rail, close the DIN rail latch. Press the DIN rail
mounting area of the module against the DIN rail. The latch will momentarily open and lock
into place.
Use DIN rail end anchors (Allen-Bradley part number 1492-EA35 or 1492-EAH35) for
vibration or shock environments.
For environments with greater vibration and shock concerns, use the panel
mounting method described below, instead of DIN rail mounting.
Panel Mounting
Use the dimensional template shown below to mount the module. The preferred mounting
method is to use two M4 or #8 panhead screws per module. M3.5 or #6 panhead screws may also
be used, but a washer may be needed to ensure a good mechanical contact. Mounting screws are
required on every module.
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MicroLogix 1762-OB8 Solid-State 24V DC Source Output Module 7
TIP
ATTENTION
System Assembly
The expansion I/O module is attached to the controller or another I/O module by means of a
flat ribbon cable after mounting as shown below.
Use the pull loop on the connector to disconnect modules. Do not pull on
the ribbon cable.
EXPLOSION HAZARD
• In Class I, Division 2 applications, the bus connector must be fully
seated and the bus connector cover must be snapped in place.
• In Class I, Division 2 applications, all modules must be mounted in
direct contact with each other as shown on Page 6. If DIN rail
mounting is used, an end stop must be installed ahead of the controller
and after the last 1762 I/O module.
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8 MicroLogix 1762-OB8 Solid-State 24V DC Source Output Module
ATTENTION
Field Wiring Connections
Grounding the Module
This product is intended to be mounted to a well-grounded mounting surface such as a metal
panel. Refer to Industrial Automation Wiring and Grounding Guidelines, Allen-Bradley
publication 1770-4.1, for additional information.
Output Wiring
Basic wiring of the 1762-OB8 is shown below.
OUT 0
OUT 2
OUT 4
OUT 6
OUT 7
DC COM
+VDC
OUT 1
OUT 3
OUT 5
CR
CR
CR
CR
CR
CR
+DC
24V DC (source)
-DC
A write-on label is provided with the module. Mark the identification of each terminal with
permanent ink, and slide the label back into the door.
Be careful when stripping wires. Wire fragments that fall into a module
could cause damage when power is applied. Once wiring is complete,
ensure the module is free of all metal fragments.
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MicroLogix 1762-OB8 Solid-State 24V DC Source Output Module 9
TIP
TIP
Finger-safe cover not shown for clarity.
Wiring the Finger-Safe Terminal Block
When wiring the terminal block, keep the finger-safe cover in place.
1. Route the wire under the terminal pressure plate. You can use the stripped end of the wire or a
spade lug. The terminals will accept a 6.35 mm (0.25 in.) spade lug.
2. Tighten the terminal screw making sure the pressure plate secures the wire. Recommended
torque when tightening terminal screws is 0.90 Nm (8 lb-in.).
If you need to remove the finger-safe cover, insert a screw driver into one of
the square wiring holes and gently pry the cover off. If you wire the
terminal block with the finger-safe cover removed, you will not be able to
put it back on the terminal block because the wires will be in the way.
Wire Size and Terminal Screw Torque
Each terminal accepts up to two wires with the following restrictions:
Wire Type Wire Size Terminal Screw Torque
Solid Cu-90 °C (194 °F) #14 …22 AWG 0.904 Nm (8 lb-in.)
Stranded Cu-90 °C (194 °F) #16…22 AWG 0.904 Nm (8 lb-in.)
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10 MicroLogix 1762-OB8 Solid-State 24V DC Source Output Module
O0:x.0/0
Slot number
(1)
Data file
Output
Slot delimiter
Word delimiter
Bit delimiter
Bit (0...7)
Word (always 0 for this module)
I/O Memory Mapping
Output Data File
For each output module, the output data file contains the controller-directed state of the discrete
output points. Bit positions 0…7 correspond to output terminals 0…7.
Bit Position
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Word
0 0 0 0 0 0 0 0 0 w w w w w w w w
w = write only, 0 = always at a 0 or OFF state
A
ddressing
The addressing scheme for 1762 Expansion I/O is shown below.
(1) I/O located on the controller (embedded I/O) is slot 0. I/O added to the controller (expansion I/O) begins with slot 1.
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MicroLogix 1762-OB8 Solid-State 24V DC Source Output Module 11
Specifications
General Specifications
Specification Valu e
Dimensions, HxWxD 90 x 40.4 x 87 mm (height including mounting tabs is 110 mm)
3.54 x 1.59 x 3.43 in. (height including mounting tabs is 4.33 in.)
Approximate Shipping Weight
(with carton)
Storage Temperature -40…85 °C (-40…185 °F)
Operating Temperature 0…55 °C (32…131 °F)
Operating Humidity 5…95% non-condensing
Operating Altitude 2000 m (6561 ft)
Vibration Refer to the MicroLogix 1200 Controllers Installation Instructions,
Shock
Hazardous Environment Class Class I, Division 2, Hazardous Location, Groups A, B, C, D
Noise Immunity NEMA standard ICS 2-230
Radiated and Conducted Emissions EN50081-2 Class A
ESD Immunity (IEC1000-4-2) 4 kV contact, 8 kV air, 4 kV indirect
Radiated Immunity (IEC1000-4-3) 10 V/m, 80…1000 MHz, 80% amplitude modulation, +900 MHz
Fast Transient Burst (IEC1000-4-4) 2 kV, 5 kHz
Surge Immunity (IEC1000-4-5) 2 kV common mode, 1 kV differential mode
Conducted Immunity (IEC1000-4-6)
(1) Conducted Immunity frequency range may be 150 kHz… 30 MHz if the Radiated Immunity frequency range is 30…1000
MHz.
210 g (0.46 lbs.)
publication 1762-IN006.
ISA/ANSI12.12.01
(C-UL under CSA C22.2 No. 213)
keyed carrier
10V, 0.15…80 MHz
(1)
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12 MicroLogix 1762-OB8 Solid-State 24V DC Source Output Module
Output Specifications
Specification 1762-OB8
Voltage Category 24V DC
Operating Voltage Range 20.4…26.4V DC
Number of Outputs 8
Bus Current Draw (max.) 115 mA @ 5V DC (0.575W)
Heat Dissipation (max.) 1.61 Total Watts
Signal Delay (max.) – resistive load On Delay: 0.1 ms
Off Delay: 1.0ms
Off-State Leakage (max.) 1.0 mA
On-State Current (min.) 1.0 mA
On-State Volage Drop (max.) 1.0V DC
Continuous Current per Point (max.) 0.5A @ 55°C; 1.0A @ 30°C
Continuous Current per Module (max.) 4.0 A @ 55°C; 8.0 A @ 30°C
Surge Current (maximum) 2.0 A (Repeatability is once every 2 seconds for a duration of 10 msec.
Power Supply Distance Rating 6 (The module may not be more than 6 modules away from the power
Isolated Groups Group 1: Outputs 0…7
Output Group to Backplane Isolation Verified by one of the following dielectric tests: 1200V AC for 1 sec. or
Vendor ID Code 1
Product Type Code 7
Product Code 101
supply.)
1697V DC for 1 sec.
75V DC working voltage (IEC Class 2 reinforced insulation)
Sourcing Output - Source describes the current flow between the I/O module and the field
device. Sourcing output circuits supply (source) current to sinking field devices. Field devices
connected to the negative side (DC Common) of the field power supply are sinking field devices.
Field devices connected to the positive side (+V) of the field supply are sourcing field devices.
Europe: DC sinking input and sourcing output module circuits are the commonly used options.
Typical Loading R esistor - To limit the effects of leakage current through solid-state outputs, a
loading resistor can be connected in parallel with your load. Use a 5.6k Ω, 1/4W resistor for
transistor outputs, 24V DC operation.
Recommended Surge Suppression - Use a 1N4004 diode reverse-wired across the load for
transistor outputs switching 24V DC inductive loads. For additional information, refer to
Industrial Automation Wiring and Grounding Guidelines, Allen-Bradley publication 1770-4.1.
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MicroLogix 1762-OB8 Solid-State 24V DC Source Output Module 13
Certifications
Certification (when
product is marked)
c-UL-us UL Listed Industrial Control Equipment, certified for US and Canada.
CE European Union 2004/108/EC EMC Directive, compliant with:
C-Tick Australian Radiocommunications Act, compliant with:
KC Korean Registration of Broadcasting and Communications Equipment,
(1) See the Product Certification link at http://www.rockwellautomation.com/products/certification for Declaration of
Conformity, Certificates, and other certification details.
Value
(1)
UL Listed for Class I, Division 2 Group A,B,C,D Hazardous Locations, certified for
U.S. and Canada. See UL File E334470.
EN 61326-1; Meas./Control/Lab., Industrial Requirements
EN 61000-6-2; Industrial Immunity
EN 61000-6-4; Industrial Emissions
EN 61131-2; Programmable Controllers (Clause 8, Zone A & B)
AS/NZS CISPR 11; Industrial Emissions
compliant with:
Article 58-2 of Radio Waves Act, Clause 3
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14 MicroLogix 1762-OB8 Solid-State 24V DC Source Output Module
WARNING
AVERTISSEMENT
North American Hazardous Location Approval
The following modules are North American Hazardous Location approved: 1762-OB8
The following information applies when
operating this equipment in hazardous
locations:
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.
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.
• All wiring must comply with
N.E.C. article 501-4(b).
• The interior of the enclosure must
be accessible only by the use of a
tool.
• For applicable equipment (relay
modules, etc.), exposure to some
chemicals may degrade the
sealing properties of materials
used in the following devices:
Relays, Epoxy. It is recommended
that the User periodically inspect
these devices for any degradation
of properties and replace the
module if degradation is found.
Informations sur l’utilisation de cet
équipement en environnements dangereux:
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.
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 com posant
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.
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Notes:
MicroLogix 1762-OB8 Solid-State 24V DC Source Output Module 15
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Rockwell Automation Support
Rockwell Automation provides technical information on the Web to assist you in using its products. At
http://www.rockwellautomation.com/support/
technical and application notes, sample code and links to software service packs, and a MySupport feature that
you can customize to make the best use of these tools.
For an additional level of technical phone support for installation, configuration and troubleshooting, we offer
TechConnect support programs. For more information, contact your local distributor or Rockwell Automation
representative, or visit http://www.rockwellautomation.com/support/
, you can find technical manuals, a knowledge base of FAQs,
.
Installation Assistance
If you experience a problem 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
product up and running.
United States or
1.440.646.3434
Canada
Outside United
States or
Canada
Use the
Worldwide Locator at
http://www.rockwellautomation.com/support/americas/phone_en.html, or contact your
local Rockwell Automation representative.
New Product Satisfaction Return
Rockwell Automation tests all of its products to ensure that they are fully operational when shipped from the
manufacturing facility. However, if your product is not functioning and needs to be returned, follow these
procedures.
United States Contact your distributor. You must provide a Customer Support case
number (call the phone number above to obtain one) to your distributor
to complete the return process.
Outside United States Please contact your local Rockwell Automation representative for the
return procedure.
Documentation Feedback
Your comments will help us serve your documentation needs better. If you have any suggestions on how to
improve this document, complete this form, publication RA-DU002
http://www.rockwellautomation.com/literature/
Allen-Bradley, Rockwell Automation, MicroLogix, and TechConnect are trademarks of Rockwell Automation, Inc.
Tra demarks not belonging to Rockwell Automation are property of their respective companies.
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Publication 1762-IN008B-EN-P - July 2013
Supersedes Publication 1762-IN008A-EN-P - July 2000 Copyright © 2013 Rockwell Automation, Inc. All rights reserved.
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