Allen-Bradley ControlLogix 1756-OA8 User manual

Publication 1756-5.16 - September 1999
Installation Instructions
ControlLogix
AC (74-265V) Output Module
(Catalog Number 1756-OA8)
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To: See page:
Prevent Electrostatic Discharge 2
See Removal and Insertion Under Power (RIUP) 2
Understand Compliance to European Union Directive 3
Note the Power Requirements 4
Identify the Module Components 4
Install the Module 5
Key the Removable Terminal Block/Interface Module 6
Wire the Removable Terminal Block 7
Assemble the Removable Terminal Block and the Housing 9
Install the Removable Terminal Block onto the Module 10
Check the Indicators 11
Remove the Removable Terminal Block from the Module 12
Remove the Module 12
See Specifications 13
Understand CSA Hazardous Location Approval 14
Allen-Bradley HMIs

2ControlLogix AC (74-265V) Output Module
Publication 1756-5.16 - September 1999
Prevent Electrostatic Discharge
Removal and Insertion Under Power (RIUP)
ATTENTION
!
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ControlLogix AC (74-265V) Output Module 3
Publication 1756-5.16 - September 1999
Understand Compliance to European Union Directive
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Allen-Bradley HMIs

4ControlLogix AC (74-265V) Output Module
Publication 1756-5.16 - September 1999
Note the Power Requirements
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Identify the Module Components
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Removable Terminal Block and Housing
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20976-M
Side view Front view
1756-OA8 module RTB door label

ControlLogix AC (74-265V) Output Module 5
Publication 1756-5.16 - September 1999
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Install the Module
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20861–M 20862–M
21
Align circuit board with top and
bottom chassis guides. Slide module into chassis until module tabs ‘click’.
Printed
Circuit
Board
Locking tab
Allen-Bradley HMIs

6ControlLogix AC (74-265V) Output Module
Publication 1756-5.16 - September 1999
Key the Removable Terminal Block/Interface Module
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20850–M
U-shaped
Keying Band
20851–M
12
0
34567
Wedge-shaped
Keying Tab
Begin keying in
section #6 or #7.
Module side of RTB

ControlLogix AC (74-265V) Output Module 7
Publication 1756-5.16 - September 1999
Wire the Removable Terminal Block
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For the Spring Clamp RTB
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For the NEMA Screw RTB
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20863–M
Allen-Bradley HMIs

8ControlLogix AC (74-265V) Output Module
Publication 1756-5.16 - September 1999
Wiring example
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12
34
5
6
7
8
910
11
12
1314
1516
1718
19
20
40178-M
NOTES: All terminals with the same name are connected together on the module.
For example, L1 can be connected to any terminal marked L1-0.
When you daisy chain from a group to another RTB, always connect the daisy
chain to the terminal directly connected to the supply wire, as shown above.
This wiring example shows a single voltage source.
Daisy chain to
other RTBs
Group 0Group 0
Group 1Group 1
L2
1756-OA8
L1-0
L1-0
L1-0
L1-0
L1-1
L1-1
L1-1
L1-1
L1-0
L1-1
OUT-0
OUT-1
OUT-2
OUT-3
OUT-4
OUT-5
OUT-6
OUT-7
Not used
Not used
L1

ControlLogix AC (74-265V) Output Module 9
Publication 1756-5.16 - September 1999
Assemble the Removable Terminal Block and the Housing
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20852-M
Groove
Groove
Side edge of the RTB
Side edge of the RTB
Strain relief area
1756-TBNH RTB shown for reference
Allen-Bradley HMIs

10 ControlLogix AC (74-265V) Output Module
Publication 1756-5.16 - September 1999
Install the Removable Terminal Block onto the Module
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20853–M 20854–M
Top
guide
Left-side guides
Bottom guide
Locking
tab
Align the top, bottom and left
side guides of the RTB with
the guides on the module.
Press quickly and evenly to seat
the RTB on the module until the
latches snap into place. Slide
the locking tab down to lock the
RTB onto the module.