Allen-Bradley ControlLogix 1756-OB16D User manual

Publication 1756-IN058D-EN-P - October 2000
Installation Instructions
ControlLogix
DC (19.2-30V) Diagnostic Output Module
(Catalog Number 1756-OB16D)
Obtain a User Manual
This product also has a user manual (pub. no. 1756-6.5.8). To view it,
visit www.ab.com/manuals or www.theautomationbookstore.com
You can also purchase a printed manual by:
•contacting your local distributor or Rockwell Automation
representative
•visiting www.theautomationbookstore.com and placing
an order
To: See page:
Obtain a User Manual 1
Identify the Module Components 2
Prevent Electrostatic Discharge 3
See Removal and Insertion Under Power (RIUP) 3
Understand Compliance to European Union Directive 4
Note the Power Requirements 5
Install the Module 5
Key the Removable Terminal Block/Interface Module 6
Wire the Module 7
Assemble the Removable Terminal Block and the Housing 8
Install the Removable Terminal Block onto the Module 8
Check the Indicators 10
Remove the Removable Terminal Block from the Module 11
Remove the Module 12
See 1756-OB16D Specifications 12
Hazardous Location information 14
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2ControlLogix DC (19.2-30V) Diagnostic Output Module
Publication 1756-IN058D-EN-P - October 2000
•calling 800.963.9548 (USA/Canada) or 001.320.725.1574
(outside USA/Canada)
Identify the Module Components
You received the following components with your order:
•1756-OB16D module
•Removable Terminal Block (RTB) door label
If you did not receive these components, contact your Rockwell
Automation sales office.
This module mounts in a ControlLogixchassis and uses a
separately-ordered RTB or a Bulletin 1492 Interface Module (IFM) to
connect all field-side wiring.
This module uses one of the following RTBs:
•1756-TBCH 36 position Cage clamp RTB
•1756-TBS6H 36 position Spring clamp RTB
Use an extended-depth cover (1756-TBE) for applications with heavy
gauge wiring or requiring additional routing space. When using an
IFM, consult the documentation that came with it to connect
all wiring.
IMPORTANT Before you install your module, you should
have already:
•installed and grounded a 1756 chassis and
power supply.
•ordered and received an RTB or IFM and its
components for your application.

ControlLogix DC (19.2-30V) Diagnostic Output Module 3
Publication 1756-IN058D-EN-P - October 2000
Prevent Electrostatic Discharge
Removal and Insertion Under Power (RIUP)
ATTENTION
!
Electrostatic discharge can damage integrated circuits or
semiconductors if you touch backplane 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 backplane 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.
WARNING
!
This module is designed so you can remove and insert it
under backplane power and field-side power. When you
remove or insert a module while field-side power is
applied, you may cause an electrical arc. An electrical
arc can cause personal injury or property damage
because it may:
•send an erroneous signal to your system’s field
devices, causing unintended machine motion or loss
of process control.
•cause an explosion in a hazardous environment.
Repeated electrical arcing causes excessive wear to
contacts on both the module and its mating connector.
Worn contacts may create electrical resistance.
When you insert or remove the module while backplane
power is on, or you connect or disconnect the 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
non-hazardous before proceeding.
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4ControlLogix DC (19.2-30V) Diagnostic Output Module
Publication 1756-IN058D-EN-P - October 2000
Understand Compliance to European Union Directive
If this product bears the CE marking, it is approved for installation
within the European Union and EEA regions. It has been designed
and tested to meet the following directives.
EMC Directive
This product is tested to meet Council Directive 89/336/EEC
Electromagnetic Compatibility (EMC) and the following standards, in
whole or in part, documented in a technical construction file:
•EN 50081-2 EMC - Generic Emission Standard, Part 2 -
Industrial Environment
•EN 50082-2 EMC - Generic Immunity Standard, Part 2 -
Industrial Environment
This product is intended for use in an industrial environment.
Low Voltage Directive
This product is tested to meet Council Directive 73/23/EEC Low
Voltage, by applying the safety requirements of EN 61131-2
Programmable Controllers, Part 2 - Equipment Requirements and
Tests.
For specific information required by EN 61131-2, see the appropriate
sections in this publication, as well as the following Allen-Bradley
publications:
•Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1
•Automation Systems Catalog, publication B111
This equipment is classified as open equipment and must be installed
(mounted) in an enclosure during operation as a means of providing
safety protection.

ControlLogix DC (19.2-30V) Diagnostic Output Module 5
Publication 1756-IN058D-EN-P - October 2000
Note the Power Requirements
This module receives power from the 1756 chasis power supply and
requires 2 sources of power from the backplane:
•250mA at 5.1V dc
•140mA at 24V dc
Add this current/power value (4.64W) to the requirements of all other
modules in the chassis to prevent overloading the power supply.
Install the Module
You can install or remove the module while chassis power is applied.
ATTENTION
!
The module is designed to support Removal and
Insertion Under Power (RIUP). However, when
you remove or insert an RTB with field-side power
applied, unintended machine motion or loss of
process control can occur. Exercise extreme
caution when using this feature.
20861–M 20862–M
1. Align circuit board with top and
bottom chassis guides.
2. Slide module into chassis until
module locking tabs ‘click’.
Printed
Circuit
Board
Locking tab
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6ControlLogix DC (19.2-30V) Diagnostic Output Module
Publication 1756-IN058D-EN-P - October 2000
Key the Removable Terminal Block/Interface Module
Wedge-shaped keying tabs and U-shaped keying bands came with
your RTB to prevent connecting the wrong wires to your module.
Key positions on the module that correspond to unkeyed positions
on the RTB. For example, if you key the first position on the module,
leave the first position on the RTB unkeyed.
Reposition the tabs to rekey future module applications.
Wire the Removable Terminal Block
Wire the RTB with a 1/8 inch (3.2mm) maximum flat-bladed
screwdriver before installing it onto the module.
20850–M
1. Insert the U-shaped band as shown.
2. Push the band until it snaps in place.
U-shaped
bands
1. Insert the wedge-shaped tab with rounded edge first.
2. Push the tab until it stops.
20851–M
Wedge-shaped tab
Key the Module Key the RTB/IFM
Spring Clamp RTB Cage Clamp RTB
20860-M 20859-M
1. Strip 7/16 inch (11mm) maximum length of
wire.
2. Insert the screwdriver into the inner hole
of the RTB.
3. Insert the wire into the open
terminal and remove the
screwdriver.
1. Strip 3/8 inch (9.5mm) maximum length of
wire.
2. Insert the wire into the open terminal.
3. Turn the screw clockwise to close the
terminal on the wire.

ControlLogix DC (19.2-30V) Diagnostic Output Module 7
Publication 1756-IN058D-EN-P - October 2000
Wire the Module
You can only connect wiring to your module through an RTB or IFM.
The example below shows how to wire the module.
After completing field-side wiring, secure the wires in the strain relief
area with a cable-tie.
12
34
5
6
78
910
1112
1314
1516
1718
1920
2122
2324
2526
2728
2930
31
32
3334
3536
40173-M
+–
1. All terminals with the same name are connected together on the module. For example,
DC COM can be connected to either terminal marked GND-1.
2. When you daisy chain to other RTBs, always connect the daisy chain to the terminal
directly connected to the supply wire, as shown in the example above.
3. This wiring example shows a single voltage source.
4. If separate power sources are used, do not exceed the specified isolation voltage.
Daisy chain
to other RTBs
DC COM
Group 0 Group 0
Group 1 Group 1
1756-OB16D
+DC-0
+DC-0
+DC-0
+DC-0
+DC-1
+DC-0
+DC-0
+DC-0
GND-0
Not used
+DC-1
+DC-1
+DC-1
+DC-1
+DC-1
+DC-1
GND-1
GND-1
OUT-0
OUT-1
OUT-2
OUT-3
OUT-8
OUT-4
OUT-5
OUT-6
OUT-7
Not used
OUT-9
OUT-10
OUT-11
OUT-12
OUT-13
OUT-14
OUT-15
Not used
Daisy chain to other RTBs
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8ControlLogix DC (19.2-30V) Diagnostic Output Module
Publication 1756-IN058D-EN-P - October 2000
Assemble the Removable Terminal Block and the Housing
Install the Removable Terminal Block onto the Module
WARNING
!
The RTB is designed to support Removal and Insertion
Under Power (RIUP). However, when you remove or
insert an RTB with field-side power applied, unintended
machine motion or loss of process control can
occur. Exercise extreme caution when using this feature.
It is recommended that field-side power be removed
before installing the RTB onto the module.
When you remove or insert a module while field-side
power is applied, you may cause an electrical arc. An
electrical arc can cause personal injury or property
damage because it may:
•send an erroneous signal to your system’s field
devices, causing unintended machine motion or loss
of process control.
•cause an explosion in a hazardous environment.
Repeated electrical arcing causes excessive wear to
contacts on both the module and its mating connector.
Worn contacts may create electrical resistance.
When you insert or remove the module while backplane
power is on, or you connect or disconnect the 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
non-hazardous before proceeding.
20858–M
Groove
Groove
Side edge of the RTB
Side edge of the RTB
Strain relief area
1. Align the grooves at the bottom of the housing with the side edges of the RTB.
2. Slide the RTB into the housing until it snaps into place.

ControlLogix DC (19.2-30V) Diagnostic Output Module 9
Publication 1756-IN058D-EN-P - October 2000
Before installing the RTB, make certain:
•field-side wiring of the RTB has been completed.
•the RTB housing is snapped into place on the RTB.
•the RTB housing door is closed.
•the locking tab at the top of the module is unlocked.
20853–M
20854–M
Module
guide
RTB guides
Locking
tab
1. Align the side and top, bottom RTB guides with the
side, top and bottom module guides.
2. Press quickly and evenly to seat the RTB on the
module until the latches snap into place.
3. Slide the locking tab down to lock the RTB
onto the module.
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10 ControlLogix DC (19.2-30V) Diagnostic Output Module
Publication 1756-IN058D-EN-P - October 2000
Check the Indicators
The indicators show individual I/O status (yellow) for each point and
a bi-colored LED for module "OK" (red/green).
During power up, an indicator test is done and the following occurs:
•The "OK" indicator turns red for 1 second and then turns to
flashing green if it has passed the self-test.
•The I/O status indicators turn ON for a maximum of 2 seconds
and then turn OFF.
This completes installation of the module. Use the information below
to remove the module.
LED
indicator:
This
display:
Means: Take this action:
OK Steady
green light
The outputs are actively being
controlled by a system
processor.
None
OK Flashing
green light
The module has passed
internal diagnostics but is not
actively controlled.
Configure the module.
OK Flashing red
light
Previously established
communication has timed out.
Check controller and chassis
communication.
OK Steady red
light
An unrecoverable error has
occurred on the module.
Replace the module.
I/O State Yellow The output is active. None
I/O Fault Red A fault has occurred for this
point.
Check this point at the
controller.
40463-M
ST012 34567
FLT012 34567
DIAGNOSTIC
S T 8 9 10 11 12 13 14 15
FLT 8 9 101112131415
DC OUTPUT
O
K