Rockwell Automation 1756-M02AS User Manual

Installation Instructions

SSI Servo Module

(Catalog Number 1756-M02AS) The Synchronous Serial Interface (SSI) Servo Module mounts in a
ControlLogix™ chassis and uses a removable terminal block (RTB) to connect all field-side wiring.
Before you install your module you should have:
ordered and received an RTB and its components for your
application.
To: See page:
Note the Power Requirements 4 Identifying Module Components 5 Installing the Module 6 Keying the Module & Removable Terminal Block/Interface Module 7 Wiring a Removable Terminal Block (RTB) 8 Wiring to a Servo Module 10 Wiring Registration Sensors 11 Wiring the Home Limit Switch 12 Wiring the OK Contacts 12 Assembling the Removable Terminal Block and the Housing 13 Installing the Removable Terminal Block onto the Module 13 Checking the LED Indicators 14 Removing the Removable Terminal Block from the Module 19 Removing the Module 20 1756-M02AS Specifications 21 Rockwell Automation Support Back Cover
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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, property damage, or economic loss.
IMPORTANT
ATTENTION
SHOCK HAZARD
BURN HAZARD
Publication
Identifies information that is critical for successful application and understanding of the product.
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 drive to alert people that dangerous voltage may be present.
Labels may be located on or inside the drive to alert people that surfaces may be dangerous temperatures.
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Environment and Enclosure

SSI Servo Module 3
ATTENTION
This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II applications (as defined in IEC publication 60664-1), at altitudes up to 2000 meters without derating. This equipment is considered Group 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 “open type” equipment. It must be mounted within an enclosure that is suitably designed for those specific environmental conditions that will be present and appropriately designed to prevent personal injury resulting from accessibility to live parts. The interior of the enclosure must be accessible only by the use of a tool. Subsequent sections of this publication may contain additional information regarding specific enclosure type ratings that are required to comply with certain product safety certifications. 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.

Preventing Electrostatic Discharge

ATTENTION
This equipment is sensitive to electrostatic discharge, 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.
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Removal and Insertion Under Power

WARNING
When you insert or remove the module while backplane power is on, an electrical arc can occur. This could cause an explosion in hazardous location installations. Be sure that power is removed or the area is nonhazardous before proceeding.
Repeated electrical arcing causes excessive wear to contacts on both the module and its mating connector. Worn contacts may create electrical resistance that can affect module operation.

Note the Power Requirements

This module receives power from the 1756 chassis power supply and requires two sources of power from the backplane:
700mA at 5.1 V dc
2.5 mA at 24V dc
Add this current to the requirements of all other modules in this chassis to prevent overloading the backplane power supply.
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SSI Servo Module 5

Identifying Module Components

You received two components with your order:
1756-M02AS module
RTB door label
If you did not receive these components, contact your Rockwell Automation representative.
This module mounts in a 1756 chassis and uses a separately-ordered RTB or a Bulletin 1492 Interface Module (IFM)
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 wiring.
(1)
to connect all field-side wiring. This
IMPORTANT
Before you install your module, you should:
install and ground a 1756 chassis and power supply.
order and receive an RTB or IFM, and its components, for
your application.
(1)
The ControlLogix system has been agency certified using only the ControlLogix RTBs (i.e. 1756-TBCH, 1756-TBNH, 1756-TBSH and 1756-TBS6H). Any application that requires agency certification of the ControlLogix system using other wiring termination methods may require application specific approval by the certifying agency.
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Installing the Module

You can install or remove the module while chassis power is applied.
WARNING
When you insert or remove the module while backplane power is on, an electrical arc can occur. This could cause an explosion in hazardous location installations. Be sure that power is removed or the area is nonhazardous before proceeding.
Repeated electrical arcing causes excessive wear to contacts on both the module and its mating connector. Worn contacts may create electrical resistance that can affect module operation.
1. Align the circuit board with the top and bottom chassis guides.
Printed Circuit Board
20861-M
Figure 1 Circuit Board Alignment
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SSI Servo Module 7
2. Slide the module into the chassis until module tabs ‘click’.
Locking Tab
20862-M
Figure 2 Module Locking Tabs

Keying the Module and Removable Terminal Block/Interface Module

Use the wedge-shaped keying tabs and U-shaped keying bands 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.
1. To key the module, insert the U-shaped band, as shown.
Figure 3 Keying Band
U-shaped bands
20850–M
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2. Push the band until it snaps in place.
3. To key the RTB or IFM, insert the wedge-shaped tab with rounded
edge first, as shown.
Wedge-shaped tab
20851–M
Figure 4 Keying Band
4. Push the tab until it stops.
Reposition the tabs to rekey future module applications.

Wiring a Removable Terminal Block (RTB)

Your 1756-M02AS module uses two types of RTBs (each RTB comes with housing) to connect wiring.
Cage clamp - Catalog number 1756-TBCH
Spring clamp - Catalog number 1756-TBS6H
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