Installation Instructions
rs
ArmorPoint 24V dc Output Modules, Series A
Catalog Numbers 1738-OB8EM23, 1738-OB8EM12,
1738-OB8EM8, 1738-OB4EM12, 1738-OB4EM8, 1738-OB2EM12,
1738-OB2EPM12, 1738-OV4EM12
The ArmorPoint I/O family consists of modular I/O modules. The
sealed IP67 housing of these modules requires no enclosure. (Note
that environmental requirements other th an IP 67 may require an
additional appropriate housing.) I/O connectors are sealed M8 (pico)
or M12 (micro) or M23 styles. The mounting base ships with the
module. The 1738-OB8EM23, 1738-OB8EM12, and 1738-OB8EM8
modules are shown below.
1738-OB8EM23
M23 Connector
1738-OB8EM23/A
24V dc In
MOD
NET
Connector
M8-A
Connector
M8-C
Connector
M8-E
Connector
M8-G
0
1
2
3
4
5
6
7
43862
1738-OB8EM8
Connector
M12-A
LED
Indicators
Connector
M12-C
0
2
4
6
1738-OB8EM12
1738-OB8EM8/A
24V dc 0.5Amp
Out
1
MOD
3
5
7
1738-OB8EM12/A
24V dc Out
Connector
0
1
2
3
4
5
6
7
M12-B
LED
Indicato
Connector
0
1
2
MOD
3
NET
4
5
6
7
43676
M12-D
Connector
M8-B
NET
0
1
2
3
4
5
6
7
Connector
M8-D
LED
Indicators
Connector
M8-F
Connector
M8-G
43684
1 Publication 1738-IN001C-EN-E - June 2005
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://literature.rockwellautomation.com) describes some important differences between solid state
equipment and hard-wired electromechanical devices. Because of thi s 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.
Publication 1738-IN001C-EN-E - June 2005
BURN HAZARD
Labels may be located on or inside the equipment to alert people that surfaces may be
dangerous temperatures.
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, 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.
Publication 1738-IN001C-EN-E - June 2005
4 ArmorPoint 24V dc Output Modules, Series A
Drilling dimensions
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 I/O base on a wall or panel, use the screw holes
provided in the base.
Adapter
4.02 in.
102 mm
IMPORTANT
The module must be mounted on a grounded metal
mounting plate or other conductive surface.
Refer to the Drilling Dimensions illustration of the base with an
adapter to help you mount the base.
1.9 in.
47.2 mm
1.81 in.
46 mm
2.0 in.
50 mm
0.87 in.
22 mm
2.0 in.
50 mm
0.87 in.
22 mm
2.0 in.
50 mm
43769
Publication 1738-IN001C-EN-E - June 2005
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
dimensions 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
Publication 1738-IN001C-EN-E - June 2005
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 bridges two bases.
Module bridges 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 hear a clicking sound when the module is properly
engaged.
The locking mechanism locks the module to the base.
Remove the 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 lifts up off the base.
Publication 1738-IN001C-EN-E - June 2005
3. Pull the module off of the base.
ArmorPoint 24V dc Output Modules, Series A 7
(view into connector)
Wire the Modules
Following are wiring instructions for the ArmorPoint digital 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
(view into connector)
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)
43583
Output 4 (M8-E) (1738-OB8EM8 module only)
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
43664
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
Publication 1738-IN001C-EN-E - June 2005
8 ArmorPoint 24V dc Output Modules, Series A
1738-OB8EM23
Communicate with Your Module
1
9
2
10
3
11
4
ATTENTION
8
7
12
6
5
43681
(view into connector)
Pin 1 -Output 0 Pin 7 - Output 6
Pin 2 -Output 1 Pin 8 - Output 7
Pin 3 -Output 2 Pin 9 - Return (Com)
Pin 4 -Output 3 Pin 10 - Return (Com)
Pin 5 -Output 4 Pin 11 - 24V dc
Pin 6 -Output 5 Pin 12 - Chassis
Make sure all connectors and caps are securely
tightened to properly seal the connections against
leaks and maintain IP67 requirements.
I/O messages are sent to (consumed) and received from (produced)
the ArmorPoint I/O modules. Messages are mapped into the
processor’s memory. ArmorPoint I/O output 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 1738-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
Publication 1738-IN001C-EN-E - June 2005
ArmorPoint 24V dc Output Modules, Series A 9
1738-OB4EM12, 1738-OB4EM8, 1738-OV4EM12
Message size: 1 Byte
7 6 5 4 3 2 1 0
Produces
(scanner Rx)
Not Used Ch3 Ch2 Ch1 Ch0 Channel status
Consumes
(scanner Tx)
Where: Channel status 0 = no error, 1 = error; Output state 0 = off, 1 = on
Not Used Ch3 Ch2 Ch1 Ch0 Output state
1738-OB8EM23, 1738-OB8EM12, 1738-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-IN001C-EN-E - June 2005
10 ArmorPoint 24V dc Output Modules, Series A
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 Indicator
Network Status Indicator
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.
Publication 1738-IN001C-EN-E - June 2005
ArmorPoint 24V dc Output Modules, Series A 11
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
ArmorPoint Digital Output Modules
Number of Outputs 1738-OB2E - 2 (1 group of 2) non-isolated, sourcing
1738-OB2EP - 2 (1 group of 2) non-isolated, sourcing
1738-OB4E - 4 (1 group of 4) non-isolated, sourcing
1738-OV4E - 4 (1 group of 4) non-isolated, sinking
1738-OB8E - 8 (1 group of 8) non-isolated, sourcing
Voltage Drop, On-state Output, Max. 0.2V dc (sourcing modules)
0.7V dc (sinking module)
Voltage, External DC Power Supply, Range 10 … 28.8V dc
Voltage, External DC Power Supply, Nom. 24V dc
Voltage, Off-state Output, Max. 28.8V dc
Voltage, On-state Output, Nom. 24V dc
Voltage, On-state Output, Max 28.8V dc
Voltage, On-state Output, Min 10V dc
Voltage, Operating 10 … 28.8V dc
Current, External DC Power Supply 8 mA (2 connector module)
16 mA (4 connector modules)
32 mA (8 connector modules)
Current Leakage, Off-state Output, Max. 0.5 mA
Current, On-state Output Max. 1.0 A per channel, electronically protected
Current, On-state Output Min. 1.0 mA per channel
Current, Output Rating 1738-OB2E - 1.0 A per channel, not to exceed 2.0 A maximum per module
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
Current, Output Surge, Max. 2 A for 10 ms, repeatable every 3 seconds
1738-OB2EP - 2 A, electronically protected
General Specifications
Dimensions (includes I/O module Metric
and mounting base)
Dimensions (includes I/O module Imperial
and mounting base)
Isolation Voltage
(continuous-voltage withstand rating)
Keyswitch Position 1
120Hx72Wx42D
4.72Hx2.82Wx1.65D
50V rms
Tested at 1250V ac rms for 60s
Publication 1738-IN001C-EN-E - June 2005
12 ArmorPoint 24V dc Output Modules, Series A
General Specifications (cont)
LED Indicators 2, 4, or 8 yellow/red output status, logic side
1 green/red network status, logic side
1 green/red module status, logic side
Output Delay Time, OFF to ON, Max.
Output Delay Time, ON to OFF, Max.
1
1
0.1 ms
0.1 ms
Output Point Density 2, 4, 8
PointBus Current, Max. 75 mA @ 5V dc
Power Dissipation, Max. 1738-OB2E - 0.8W @ 28.8V dc
1738-OB2EP - 3.4W @ 28.8V dc
1738-OB4E - 1.2W @ 28.8V dc
1738-OV4E - 2.9W @ 28.8V dc
1738-OB8E - 2.0W @ 28.8V dc
Thermal Dissipation, Max. 1738-OB2E - 2.7 BTU/hr. @ 28.8V dc
1738-OB2EP - 11.6 BTU/hr. @ 28.8V dc
1738-OB4E - 4.1 BTU/hr. @ 28.8V dc
1738-OV4E - 9.9 BTU/hr. @ 28.8V dc
1738-OB8E - 6.8 BTU/hr. @ 28.8V dc
Weight, Imperial 0.64 lb
Weigh, Metric 0.29 kg
Operating 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):
-20 … 60 °C (-4 … 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),
-40 … 85 °C (-40 … 185°F)
Relative Humidity IEC 60068-2-30 (Test Db, Un-packaged Non-operating Damp Heat):
5-95% non-condensing
Shock IEC60068-2-27 (Test Ea, Unpackaged Shock):
Operating 30 g
Non-operating 50 g
Vibration IEC60068-2-6 (Test Fc, Operating):
5 g @ 10-500 Hz
ESD Immunity IEC 61000-4-2:
6 kV contact discharges
8 kV air discharges
Radiated RF Immunity IEC 61000-4-3:
10V/m with 1 kHz sine-wave 80% AM from 30 MHz to 2000 MHz
10V/m with 200 Hz 50% Pulse 100% AM at 900 Mhz
10V/m with 200 Hz 50% Pulse 100% AM at 1890 Mhz
EFT/B Immunity IEC 61000-4-4:
±3 kV at 5 kHz on signal ports
Surge Transient Immunity IEC 61000-4-5:
±1 kV line-line(DM) and ±2 kV line-earth(CM) on signal ports
Conducted RF Immunity IEC 61000-4-6:
10Vrms with 1 kHz sine-wave 80% AM from 150 kHz … 80 MHz
Emissions CSPR 11:
Group 1, Class A
Publication 1738-IN001C-EN-E - June 2005
ArmorPoint 24V dc Output Modules, Series A 13
General Specifications (cont)
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
Conductor Category
Certifications:
2
3
(when product is marked)
1 - on signal ports
c-UL-us UL Listed Industrial Control Equipment, certified for US and Canada
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-Tick Australian 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-IN001C-EN-E - June 2005
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.
Outside United
States
Please contact your local Rockwell Automation representative for return
procedure.
ArmorPoint is a trademark of Rockwell Automation.
Publication 1738-IN001C-EN-E - June 2005 14 PN 957955-31
Supersedes Publication 1738-IN001B-EN-E - July 2004 Copyright © 2005 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.
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