Rockwell Automation 1738-XXXX User Manual
Installation Instructions
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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
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