Rockwell Automation 1756-M02AE Installation Instructions

Installation Instructions

Analog Encoder (AE) Servo Module

(Catalog Number 1756-M02AE)

The Analog Encoder (AE) 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:

• installed and grounded a 1756 chassis and power supply.

• ordered and received an RTB and its components for your

application.

page:

Preventing Electrostatic Discharge 2
Removing and Inserting Under Power (RIUP) 3
Understanding Compliance to the European Union Directive 3
Determining the Power Requirements 4
Identifying Module Components 4
Installing the Module 6
Keying the Removable Terminal Block 8
Wiring a Removable Terminal Block 10
Wiring Examples 13
Assembling the Removable Terminal Block and Housing 22
Installing the Removable Terminal Block onto the Module 23
Checking the LED Indicators 24
Removing the Removable Terminal Block from the Module 29
Removing the Module from the Chassis 31
Module Specifications 32
Installation Environment 34

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2 Analog Encoder (AE) Servo Module

WARNING

!

Preventing Electrostatic Discharge

Electrostatic discharge can damage the servo board if
you touch the circuitry or connector pins without taking
precautions. Follow these guidelines when you handle
the servo board:

• Touch a grounded object to discharge potential
static.

• Wear an approved grounding wrist strap.

• Do not touch the connector or connector pins on

the servo board.

• Do not touch circuit components inside the servo
board.

• If available, use a static-safe work station.

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Analog Encoder (AE) Servo Module 3

WARNING

!

Removing and Inserting Under Power (RIUP)

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 can cause an electrical arc. An electrical arc
can cause personal injury or property damage because it
can:

• Send an erroneous signal to your system 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 can create electrical resistance. For
additional information on RIUP, please contact your
local Allen-Bradley sales representative.

Understanding Compliance to the 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 50081-2EMC - Generic Emission Standard, Part 2 - Industrial
Environment

• EN 50082-2EMC - Generic Immunity Standard, Part 2 - Industrial
Environment

This product is intended for use in an industrial environment.

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4 Analog Encoder (AE) Servo Module

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 Test.

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.

Determining the Power Requirements

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

Identifying Module Components

You received two components with your order:

• 1756-M02AE module

• RTB door label

Publication 1756-IN047D-EN-P - March 2001

Figure 1 1756-M02AE Module

Side view

2 Axis Servo

Front view

1756-M02AE module

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

32

34

36

1

3

5

7

9

11

13

15

17

19

21

23

25

27

29

31

33

35

+OUT-0

-OUT-0

+ENABLE-0

-ENABLE-0

DRVFLT-0

CHASSIS

IN_COM

HOME-0

REG24V-0

REG5V-0

+OK

CHASSIS

+CHA-0

-CHA-0

+CHB-0

-CHB-0

+CHZ-0

-CHZ-0

+OUT-1

-OUT-1

+ENABLE-1

-ENABLE-1

DRVFLT-1

CHASSIS

IN_COM

HOME-1

REG24V-1

REG5V-1

-OK

CHASSIS

+CHA-1

-CHA-1

+CHB-1

-CHB-1

+CHZ-1

-CHZ-1

1756-MO2AE

2 AXIS

ENCODER/ANALOG

SERVO

RTB door label

Analog Encoder (AE) Servo Module 5

If you did not receive these components, contact your local Allen-Bradley
representative.

Removable Terminal Block and Housing

A separately-ordered RTB connects field-side wiring to the module. You
cannot use your module without an RTB and its components.

Use one of the following RTBs with your module:

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6 Analog Encoder (AE) Servo Module

WARNING

!

• 1756-TBCH 36-position cage clamp RTB

• 1756-TBS6H 36-position spring clamp RTB

You received the following components with your RTB:

• 1756-TBH standard-depth RTB housing

• wedge-shaped keying tabs and U-shaped keying bands

• RTB door label

Installing the Module

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 power is applied. Failure to observe this caution
can cause personal injury.

To install the AE module:

1. Align the module circuit board with the top and bottom chassis
guides.

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Analog Encoder (AE) Servo Module 7

P

O

W

E

R

Printed circuit board

Figure 2 Circuit Board Alignment

2. Push evenly and firmly to seat the module in the chassis. It is seated
when the top and bottom locking tabs have snapped into place.

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8 Analog Encoder (AE) Servo Module

P

O

W

E

R

Locking

tab

Figure 3 Module Locking Tabs

Note: The 1756 chassis provides grounding for your module.

Keying the Removable Terminal Block

To identify the RTB that belongs with each module, you can use a module
keying pattern. First, you can create a unique keying pattern for your module
using the U-shaped keying bands that you received with your RTB. Then you
can use the keying tabs to key the RTB with the same pattern as the module.

To prevent confusion, use a unique keying pattern to each module.

To key the module:

1. Insert the U-shaped keying band with the longer side near the
terminals.

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Analog Encoder (AE) Servo Module 9

P

OWER

U-shaped

keying band

Figure 4 Keying Band

2. Push the keying band onto the module until it snaps into place.

To key your removable terminal block:

1. With the rounded edge first, insert the wedge-shaped keying tab on
the RTB.

Note: Insert the wedge-shaped keying tabs in positions that
correspond to unkeyed positions on the module

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10 Analog Encoder (AE) Servo Module

Wedge-shaped

keying tab

Bottom of RTB

Figure 5 Keying Tab.

2. Push the keying tab onto the RTB until it stops.

Note: To use the RTB in future module applications, you can reposition

the keying tabs on the RTB.

Wiring a Removable Terminal Block

There are two types of RTBs:

This section describes how to wire each type of RTB and shows wiring
examples for the AE module.

Wire the RTB before installing it onto the module. Use a 1/8 inch (3.2mm)
maximum flat-bladed screwdriver.

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• spring clamp

• cage clamp

Analog Encoder (AE) Servo Module 11

Strain Relief Area

Wiring a Spring Clamp RTB

To wire a spring clamp RTB:

1. Strip a maximum of 7/16 inch (11mm) of insulation from the end of
your wire.

2. Insert the screwdriver into the outer hole of the RTB.

3. Insert the wire into the open terminal and remove the screwdriver.

Figure 6 Strain Relief Area

4. After you complete field-side wiring, secure the wires in the strain
relief area with a cable-tie.

Wiring a Cage Clamp RTB

To wire a cage clamp RTB:

1. Strip 5/16 - 3/8 inch (8 - 9.5mm) of insulation from the end of your
wire.

2. Insert the screwdriver into the open terminal.

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12 Analog Encoder (AE) Servo Module

Strain Relief Area

3. Turn the screw clockwise to close the terminal on the wire. Use
5 lb-in. (0.5 Nm) maximum torque

Figure 7 Closing Wire Terminal.

4. After you complete field-side wiring, secure the wires in the strain
relief area with a cable-tie.

Publication 1756-IN047D-EN-P - March 2001