Allen-Bradley 1738-OB8EM12, 1738-OB4EM8, 1738-OB8EM8, 1738-OB4EM12, 1738-OB2EM12 Installation Instructions Manual

Installation Instructions

s

ArmorPoint 24V dc Output Modules, Series A

(Cat. No. 1738-OB8EM12, -OB8EM8, -OB4EM12, -OB4EM8,

-OB2EM12, -OB2EPM12, -OV4EM12)

The ArmorPoint™ I/O family (Cat. no. 1738) consists of modular I/O
modules. The sealed IP67 housing of these modules requires no
enclosure. (Note that environmental requirements other than IP67
may require an additional appropriate housing.) I/O connectors are
sealed M8 (pico) or M12 (micro) styles. The mounting base ships with
the module. The 1738-OB8EM12 and 1738-OB8EM8 modules are
shown below.

1738-OB8EM12

Connector M12-A

Connector M12-C

1738-OB8EM8

Connector M8-A

Connector M8-C

Connector M8-E

Connector M8-G

0

1

0

2

4

6

1738-OB8EM12/A

24V dc Out

2

3

4

5

1738-OB8EM8/A

24V dc 0.5Amp

MOD

1

3

5

7

Connector M12-B

NET

0
1

2
3

6

4
5

7

6
7

43676

Out

LED Indicators

Connector M12-D

Connector M8-B

MOD

NET

0

Connector M8-D

1
2

3
4
5

6
7

LED Indicator

Connector M8-F

Connector M8-G

43684

Allen-Bradley Replacements

1 Publication 1738-IN001A-EN-E - June 2004

2 ArmorPoint 24V dc Output Modules, Series A

SHOCK HAZARD

.

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, proper ty 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

Labels may be located on or inside the equipment to alert people that dangerous voltage
may be present.

BURN HAZARD

Labels may be located on or inside the equipment to alert people that surfaces may be
dangerous temperatures.

Publication 1738-IN001A-EN-E - June 2004

ArmorPoint 24V dc Output Modules, Series A 3

ATTENTION

Environment and Enclosure

This equipment is intended for use in overvoltage
Category II applications (as defined in IEC
publication 60664-1), at altitudes up to 2000 meters
without derating.

This equipment is considered Grou p 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 "enclosed" equipment.
It should not require additional system enclosure
when used in locations consistent with the enclosure
type ratings stated in the Specifications section of this
publication. Subsequent sections of this publication
may contain additional information regarding
specific enclosure type ratings, beyond what this
product provides, 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, se e 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.

Allen-Bradley Replacements

Publication 1738-IN001A-EN-E - June 2004

4 ArmorPoint 24V dc Output Modules, Series A

1.9 in.

2.0 in.

0.87 in.

2.0 in.

0.87 in.

2.0 in.

Mount the I/O Base

ATTENTION

Preventing Electrostatic Discharge

This equipment is sensitive to electrostatic dischar ge,
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.

To mount the ArmorPoint I/O base on a wall or panel, use the screw
holes provided in the ArmorPoint base.

Adapter

4.02 in.
102 mm

IMPORTANT

The ArmorPoint I/O module must be mounted on a
grounded metal mounting plate or other conductive
surface.

A mounting illustration for the ArmorPoint base with an adapter is
shown below.

1.81 in.
46 mm

47.2 mm

50 mm

22 mm

50 mm

22 mm

50 mm

43769

Publication 1738-IN001A-EN-E - June 2004

ArmorPoint 24V dc Output Modules, Series A 5

Mounting base

Install the mounting base as follows:

1. Lay out the required points as shown above in the drilling
dimension drawing.

2. Drill the necessary holes for #8 (M4) machine or self-tapping
screws.

3. Mount the base using #8 (M4) screws.

4. Ground the system using the ground lug connection. (The

ground lug connection is also a mounting hole.)

Keyswitch­Set to position 1 for
the 1738 digital
output modules

Ground lug connection

43675

Latching mechanism

Allen-Bradley Replacements

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6 ArmorPoint 24V dc Output Modules, Series A

Install the ArmorPoint
Digital Output Module

To install the ArmorPoint digital output module, proceed as follows.

1. Using a bladed screwdriver, rotate the keyswitch on the
mounting base clockwise until the number 1 aligns with the
notch in the base.

2. Position the module vertically above the mounting base. The
module will bridge two bases.

Module will bridge two bases.

1738-OB8EM12/A

24V dc Out

0

1

2

MOD

3

NET

0
1

2
3

6

4

5

4
5

7

6
7

43771

3. Push the module down until it engages the latching mechanism.
You will hear a clicking sound when the module is properly
engaged.

The locking mechanism will lock the module to the base.

Remove the ArmorPoint Digital Output Module From the
Mounting Base

To remove the module from the mounting base:

1. Put a flat blade screwdriver into the slot of the orange latching
mechanism.

2. Push the screwdriver toward the I/O module to disengage the
latch.

The module will lift up off the base.

Publication 1738-IN001A-EN-E - June 2004

3. Pull the module off of the base.

ArmorPoint 24V dc Output Modules, Series A 7

(view into connector)

Wire the Output Modules

Following are wiring instructions for the ArmorPoint output modules.

1738-OB2EM12, 1738-OB2EPM12, 1738-OV4EM12, and
1738-OB4EM12

(view into connector)
Pin 1 - 24V dc
Pin 2 - No Connect
Pin 3 - Common
Pin 4 - Output 0 (M12-A)

Output 1 (M12-B)

43664

Output 2 (M12-C) (1738-OV4EM12 and-OB4EM12 only)
Output 3 (M12-D) (1738-OV4EM12 and-OB4EM12 only)

Pin 5 - No Connect

1738-OB4EM8 and 1738-OB8EM8

Pin 1 - 24V dc
Pin 3 - Common
Pin 4 - Output 0 (M8-A)

Output 1 (M8-B)
Output 2 (M8-C)
Output 3 (M8-D)
Output 4 (M8-E) (1738-OB8EM8 module only)

43583

Output 5 (M8-F) (1738-OB8EM8 module only)
Output 6 (M8-G) (1738-OB8EM8 module only)
Output 7 (M8-H) (1738-OB8EM8 module only)

1738-OB8EM12

(view into connector)
Pin 1 - 24V dc
Pin 2 - Output 1 (M12-A) Pin 4 - Output 0 (M12-A)

Output 3 (M12-B) Output 2 (M12-B)
Output 5 (M12-C) Output 4 (M12-C)
Output 7 (M12-D) Output 6 (M12-D)

Pin 3 - Common Pin 5 - No Connect

43664

ATTENTION

Make sure all connectors and caps are securely
tightened to properly seal the connections against
leaks and maintain IP67 requirements.

Allen-Bradley Replacements

Publication 1738-IN001A-EN-E - June 2004

8 ArmorPoint 24V dc Output Modules, Series A

Communicate With
Your Module

I/O messages are sent to (consumed) and received from (produced)
the ArmorPoint I/O modules. These messages are mapped into the
processor’s memory. These ArmorPoi nt I/O out put modules produce
1 byte of input data (scanner Rx - status). They consume 1 byte of I/O
data (scanner Tx).

Default Data Map for the ArmorPoint Output Modules

1738-OB2EM12 and -OB2EPM12

Message size: 1 Byte

7 6 5 4 3 2 1 0

Produces
(scanner Rx)

Consumes
(scanner Tx)

Where: Channel status 0 = no error, 1 = error; Output state 0 = off, 1 = on

Not Used Ch1 Ch0 Channel status

Not Used Ch1 Ch0 Output state

1738-OB4EM12, -OB4EM8, -OV4EM12

Message size: 1 Byte

7 6 5 4 3 2 1 0

Produces
(scanner Rx)

Consumes
(scanner Tx)

Where: Channel status 0 = no error, 1 = error; Output state 0 = off, 1 = on

Not Used Ch3 Ch2 Ch1 Ch0 Channel status

Not Used Ch3 Ch2 Ch1 Ch0 Output state

1738-OB8EM12, -OB8EM8

Message size: 1 Byte

7 6 5 4 3 2 1 0

Produces
(scanner Rx)

Consumes
(scanner Tx)

Where: Channel status 0 = no error, 1 = error; Output state 0 = off, 1 = on

Ch7 Ch6 Ch5 Ch4 Ch3 Ch2 Ch1 Ch0 Channel status

Ch7 Ch6 Ch5 Ch4 Ch3 Ch2 Ch1 Ch0 Output state

Publication 1738-IN001A-EN-E - June 2004

ArmorPoint 24V dc Output Modules, Series A 9

Troubleshoot with
the Indicators

1738-OB8EM12

1738-OB8EM12/A

24V dc Out

0

1

2

MOD

3

NET

0
1

2
3

6

4

5

4
5

7

6
7

Module Status Indicators
Network Status Indicators

I/O Status Indicators

43676

Indication Probable Cause
Module Status

Off No power applied to device
Green Device operating normally
Flashing Green Device needs commissioning due to missing, incomplete, or

incorrect configuration
Flashing Red Recoverable fault
Red Unrecoverable fault - may require device replacement
Flashing Red/Green Device is in self-test

Indication Probable Cause
Network Status

Off Device is not on line:

- Device has not completed dup_MAC-id test.

- Device not powered - check module status indicator.
Flashing Green Device is on line but has no connections in the established state.
Green Device is on line and has connections in the established state.
Flashing Red One or more I/O connections in timed-out state.
Red Critical link failure - failed communication device. Device detected

error that prevents it from communicating on the network.

Flashing Red/Green Communication faulted device - the device has detected a

network access error and is in communication faulted state.
Device has received and accepted an Identity Communication
Faulted Request - long protocol message.

Allen-Bradley Replacements

Publication 1738-IN001A-EN-E - June 2004

10 ArmorPoint 24V dc Output Modules, Series A

Indication Probable Cause
I/O Status

Off Output is inactive
Yellow Output is active and under control
Flashing Red Open circuit detection. No load. (Off-State only)
Red Short circuit detected. (On-State only)

Specifications

Following are specifications for the 1738 ArmorPoint digital output
modules.

ArmorPoint Digital Output Modules

Outputs per Module 1738-OB2E - 2 (1 group of 2) nonisolated, sourcing

1738-OB2EP - 2 (1 group of 2) nonisolated, sourcing
1738-OB4E - 4 (1 group of 4) nonisolated, sourcing
1738-OV4E - 4 (1 group of 4) nonisolated, sinking
1738-OB8E - 8 (1 group of 8) nonisolated, sourcing

Voltage Drop, On-State Output, Maximum 0.2V dc (sourcing modules)

0.7V dc (sinking module)
Voltage, Off-State Output, Maximum 28.8V dc
Voltage, On-State Output,

Maximum
Minimum
Nominal

Output Current Rating 1738-OB2E - 1.0 A per channel, not to exceed 2.0 A maximum per module

Output Surge Current, Maximum 2 A for 10 ms, repeatable every 3 seconds

Current Leakage, Off-State Output, Maximum 0.5 mA
Current, On-State Output Minimum 1.0 mA per channel

Output Delay Time OFF to ON, Maximum
Output Delay Time, ON to OFF, Maximum

Output Point Density 2, 4, 8
External DC Power Supply Current 8 mA (2 connector module)

External DC Power Supply Voltage Range 10-28.8V dc
External DC Power Supply Voltage Nominal 24V dc
Keyswitch Position 1

General Specifications

LED Indicators 2, 4, or 8 yellow/red output status, logic side

PointBus Current, Maximum 75 mA @ 5V dc

28.8V dc

10V dc
24V dc

1738-OB2EP - 2.0 A per channel, 4.0 A maximum per module
1738-OB4E and -OB8E - 1.0 A per channel, not to exceed 3.0 A maximum per module
1738-OV4E - 1.0 A per channel, not to exceed 4.0 A maximum per module

1738-OB2EP - 2 A, electronically protected

1

0.1 ms

1

0.1 ms

16 mA (4 connector modules)
32 mA (8 connector modules)

1 green/red network status, logic side
1 green/red module status, logic side

Publication 1738-IN001A-EN-E - June 2004

ArmorPoint 24V dc Output Modules, Series A 11

General Specifications (continued)

Power Dissipation, Maximum 1738-OB2E - 0.8W @ 28.8V dc

1738-OB4E - 1.2W @ 28.8V dc
1738-OB8E - 2.0W @ 28.8V dc
1738-OB2EP - 3.4W @ 28.8V dc
1738-OV4E - 2.9W @ 28.8V dc

Thermal Dissipation, Maximum 1738-OB2E - 2.7 BTU/hr. @ 28.8V dc

1738-OB4E - 4.1 BTU/hr. @ 28.8V dc
1738-OB8E - 6.8 BTU/hr. @ 28.8V dc
1738-OB2EP - 11.6 BTU/hr. @ 28.8V dc
1738-OV4E - 9.9 BTU/hr. @ 28.8V dc

Isolation Voltage
(continuous-voltage withstand rating)

Dimensions Inches (Millimeters) 1.25H x 2.63W x 4.25D (31.75H x 66.80W x 107.95D)
Operating Temperature IEC 60068-2-1 (Test Ad, Operating Cold),

Storage Temperature IEC 60068-2-1 (Test Ab, Un-packaged Non-operating Cold),

Relative Humidity IEC 60068-2-30 (Test Db, Un-packaged Non-operating Damp Heat):

Shock IEC60068-2-27 (Test Ea, Unpackaged Shock):

Vibration IEC60068-2-6 (Test Fc, Operating):

ESD Immunity IEC 61000-4-2:

Radiated RF Immunity IEC 61000-4-3:

EFT/B Immunity IEC 61000-4-4:

Surge Transient Immunity IEC 61000-4-5:

Conducted RF Immunity IEC 61000-4-6:

Emissions CSPR 11:

Enclosure Type Rating Meets IP65/66/67 (when marked)
Mounting Base Screw Torque #8 screw, 7.5 in. lbs. in Aluminum, 16 in. lbs. in Steel

Wiring Category
Weigh Imperial (Metric) 0.637 lb. (0.289 kg)

2

50V rms
Tested at 1250V ac rms for 60s

IEC 60068-2-2 (Test Bd, Operating Dry Heat),
IEC 60068-2-14 (Test Nb, Operating Thermal Shock):

-20 to 60°C (-4 to 140°F)

IEC 60068-2-2 (Test Bb, Un-packaged Non-operating Dry Heat),

-40 to 85°C (-40 to 185°F)

5-95% non-condensing

Operating 30g
Non-operating 50g

5g @ 10-500Hz

6kV contact discharges
8kV air discharges

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

±3kV at 5kHz on signal ports

±1kV line-line(DM) and ±2kV line-earth(CM) on signal ports

10Vrms with 1kHz sine-wave 80%AM from 150kHz to 80MHz

Group 1, Class A

1 - on signal ports

Allen-Bradley Replacements

Publication 1738-IN001A-EN-E - June 2004

12 ArmorPoint 24V dc Output Modules, Series A

General Specifications (continued)

Certifications:
(when product is marked)

c-UL-us UL Listed Industrial Control Equipment,

certified for US and Canada

3

CE

European Union 89/336/EEC EMC Directive,
compliant with:
EN 61000-6-4; Industrial Emissions
EN 50082-2; Industrial Immunity
EN 61326; Meas./Control/Lab., Industrial Requirements
EN 61000-6-2; Industrial Immunity

C-Tick3Australian Radiocommunications Act, compliant with:
AS/NZS CISPR 11; Industrial Emissions

1. OFF to ON or ON to OFF delay is time from a valid output "on" or "off" signal to output energization or de-energization.

2. Use this Conductor Category information for planning conductor routing. Refer to Publication 1770-4.1, "Industrial Automation Wiring

and Grounding Guidelines".

3. See the Product Certification link at www.ab.com for Declarations of Conformity, Certificates, and other certification details.

Publication 1738-IN001A-EN-E - June 2004

Notes:

ArmorPoint 24V dc Output Modules, Series A 13

Allen-Bradley Replacements

Publication 1738-IN001A-EN-E - June 2004

Rockwell Automation Support

Rockwell Automation provides technical information on the web to assist you in using our products. At
http://support.rockwellautomation.com, you can find technical manuals, a knowledge base of FAQs, 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://support.rockwellautomation.com.

Installation Assistance

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:

United States 1.440.646.3223

Monday – Friday, 8am – 5pm EST

Outside United
States

Please contact your local Rockwell Automation representative for any
technical support issues.

New Product Satisfaction Return

Rockwell tests all of our 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:

United States Contact your distributor. You must provide a Customer Support case

number (see phone number above to obtain one) to your distributor in
order to complete the return process.

ArmorPoint is a trademark of Rockwell Automation.

Publication 1738-IN001A-EN-E - June 2004 14 PN 957824-27

Copyright © 2004 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.