Pepperl+Fuchs ENI11HD User manual

ENI11HD
Heavy-Duty Incremental
Rotary Encoder
Manual

With regard to the supply of products, the current issue of the following document is applicable: The
General Terms of Delivery for Products and Services of the Electrical ndustry, published by the Central
Association of the Electrical ndustry (Zentralverband Elektrotechnik und Elektroindustrie (ZVE ) e.V.)
in its most recent version as well as the supplementary clause: "Expanded reservation of proprietor-
ship"
Worldwide
Pepperl+Fuchs Group
Lilienthalstr. 200
68307 Mannheim
Germany
Phone: [phone] - 0
E-mail: [e-mail]
North American Headquarters
Pepperl+Fuchs nc.
1600 Enterprise Parkway
Twinsburg, Ohio 44087
USA
Phone: [phone]
E-mail: [e-mail]
Asia Headquarters
Pepperl+Fuchs Pte. Ltd.
P+F Building
18 Ayer Rajah Crescent
Singapore 139942
Phone: [phone]
E-mail: [e-mail]
https://www.pepperl-fuchs.com

3
EN 11HD
Contents
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1 Introduction................................................................................................................
2 Declaration of Conformity......................................................................................... 5
3 Safety .......................................................................................................................... 6
3.1 Symbols Used ................................................................................................ 6
3.2 Intended Use .................................................................................................. 6
3.3 General Safety Information........................................................................... 6
Product Description .................................................................................................. 8
.1 Use and Application ...................................................................................... 8
.2 Included in Delivery....................................................................................... 9
.3 Accessories.................................................................................................... 9
5 Installation................................................................................................................ 10
5.1 Safety Information ....................................................................................... 10
5.2 Designations of the Rotary Encoder Parts................................................ 10
5.3 Assembling Hollow Shaft Rotary Encoders (General)............................. 11
5.3.1 Preparation of the Rotary Encoder for Shaft Mounting (All Types).... 12
5.3.2 Shaft Mounting (Rotary Encoder with Continuous Hollow Shaft) ..... 15
5.3.3 Shaft Mounting (Rotary Encoder with Recessed Hollow Shaft) ....... 15
5.3. Shaft Mounting (Rotary Encoder with Tapered Shaft) ...................... 18
5.3.5 Assembling the Extension Arm (All Types)....................................... 21
5. Electrical Connection .................................................................................. 2
5. .1 Grounding of the Rotary Encoder .................................................... 24
5. .2 Connection Box with Cable Duct and Terminals............................... 24
5. .3 Connection Box with Connection Cable........................................... 28
5. . Connection Box with Connector Plug............................................... 29
6 Dismounting, Storage, and Disposal..................................................................... 31
6.1 Dismounting the Rotary Encoder...............................................................31
6.2 Storage and Transportation ........................................................................ 3
6.3 Disposal ........................................................................................................ 3

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EN 11HD
ntroduction
1 Introduction
Congratulations
You have chosen a device manufactured by Pepperl+Fuchs. Pepperl+Fuchs develops, pro-
duces and distributes electronic sensors and interface modules for the market of automation
technology on a worldwide scale.
Contact
f you have any questions about the device, its functions, or accessories, please contact us at:
Pepperl+Fuchs Group
Lilienthalstraße 200
68307 Mannheim, Germany
Telephone: [phone]
Fax: [phone]
Email: [e-mail]

EN 11HD
Declaration of Conformity
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5
2 Declaration of Conformity
This product was developed and manufactured in line with the applicable European standards
and directives.
The product manufacturer, Pepperl+Fuchs Group, 68307 Mannheim, Germany, has a certified
quality assurance system that conforms to SO 9001.
Note
A declaration of conformity can be requested from the manufacturer.
ISO9001

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EN 11HD
Safety
3 Safety
3.1 Symbols Used
Safety-Relevant Symbols
Informative Symbols
Action
This symbol indicates a paragraph with instructions. You are prompted to perform an action or
a sequence of actions.
3.2 Intended Use
The EN 11HD incremental rotary encoder is used to record rotations though a direct mechani-
cal coupling with a rotating drive shaft. nternally, the rotation is converted into a sequence of
electrical pulses which are provided by the rotary encoder on several output channels. With its
robust design, the rotary encoder is particularly suitable for applications in which strong exter-
nal mechanical loads can affect the rotary encoder.
Danger!
This symbol indicates an imminent danger.
Non-observance will result in personal injury or death.
Warning!
This symbol indicates a possible fault or danger.
Non-observance may cause personal injury or serious property damage.
Caution!
This symbol indicates a possible fault.
Non-observance could interrupt the device and any connected systems and plants, or result in
their complete failure.
Note
This symbol brings important information to your attention.
Danger!
The EN 11HD incremental rotary encoder is not a safety component.
This incremental rotary encoder must not be used in applications in which the safety of persons
or system parts depends on the flawless functioning of the rotary encoder.

EN 11HD
Safety
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3.3 General Safety Information
Responsibility for planning, assembly, commissioning, operation, maintenance, and dismount-
ing lies with the plant operator.
nstallation and commissioning of all devices may be performed only by trained and qualified
personnel.
Protection of operating personnel and the system is not ensured if the product is not used in
accordance with its intended use.
Laws and regulations applicable to usage or the intended purpose must be observed. Devices
are approved only for proper usage in accordance with intended use. gnoring these instruc-
tions will void any warranty and absolve the manufacturer from any liability.
t is dangerous for the user to carry out modifications and/or repairs and doing so will void the
warranty and exclude the manufacturer from any liability. n the event of any serious errors, stop
using the device. Secure the device against unintended operation. To have the device repaired,
return it to your local Pepperl+Fuchs representative or your sales center.
Additional documents relating to this device, such as the data sheet, declarations of conformity,
certificates, etc. are an integral part of this document. They must be taken note of before using
or carrying out any work on this device.
These documents can be found at www.pepperl-fuchs.com or contact your local Pep-
perl+Fuchs representative.

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EN 11HD
Product Description
Product Description
.1 Use and Application
The EN 11HD incremental rotary encoder records the rotation of a drive shaft and converts this
internally into a sequence of pulses. Due to the nature of the code wheel, two pulse sequences
that are out of phase by 90° are available on signal channels A and B. This enables the direc-
tion of rotation to be analyzed. n addition, one reference pulse per revolution is output on sig-
nal channel Z. To suppress electrical mains-borne disturbance, the inverted signals A/, B/ and
Z/ are additionally available.
Figure 4.1 Example: rotary encoder with continuous hollow shaft with mounted ground strap and
torque rest
Series EN 11HD includes rotary encoders with a hollow shaft or recessed hollow shaft. This
means that the rotary encoders in this series are mounted directly on the drive shaft present on
the system side. The type of shaft assembly varies according to the types of shaft available:
1. Rotary encoder with continuous hollow shaft
Mounting to the drive shaft is via a shaft clamping ring.
2. Rotary encoder with recessed hollow shaft
Mounting to the cylindrical drive shaft is via a central mounting screw that grips the M6
threaded hole on the face side of the drive shaft.
3. Rotary encoder with tapered shaft
Mounting to the tapered drive shaft is via a central mounting screw that grips the M6
threaded hole on the face side of the drive shaft.
EN 11HD rotary encoders are particularly suitable for use in harsh ambient conditions. They
have:
•A high degree of shock and vibration resistance.
•Protection against shaft currents.
•High degree of protection: P66/ P67 or P69k.
•A high level of immunity to electromagnetic interference.
•A high dielectric strength of 2.5 kV (optional)
This ensures a long service life. EN 11HD rotary encoders offer a high level of process safety
and thus minimize the risk of failure.

EN 11HD
Product Description
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Operation of the electrical connection is very simple. The connection box, which can be rotated
in 4 x 90° increments, enables quick and flexible installation and maintenance in the field.
Turning of the rotary encoder with the drive shaft is prevented by a torque rest made from a
support plate and extension arm.
.2 Included in Delivery
The scope of supply of rotary encoders in this series differs depending on the design ordered.
Regardless of the design of rotary encoder ordered, the following are always included in deliv-
ery:
•EN 11HD incremental rotary encoder
•Grounding set, consisting of a ground strap, contact disk, screw, grounding label
•Torque rest EN 11 070 M6, consisting of one 70 mm support plate, two M6 x 12 hexagon
screws (D N 933), two washers (D N 125A)
•nstruction leaflets
Regardless of the design of rotary encoder ordered, the following are additionally included in
delivery:
•Mounting set (depending on the rotary encoder shaft type)
•70 mm extension arm (depending on the order option)
.3 Accessories
Note
f the incremental rotary encoder was ordered with an extension arm, then one of the swivel
heads is already pre-assembled on the support plate.
Note
Various accessories are available. Find accessory products can be found online on the product
page for the EN 11HD incremental rotary encoder at www.pepperl-fuchs.com.

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EN 11HD
nstallation
5 Installation
5.1 Safety Information
Danger!
Risk of injury
njury due to unexpected startup of the drive shaft.
•Stop the drive before carrying out any work on the device.
•Secure the drive in an appropriate manner against unexpected restart, in particular
against recommissioning by another person.
•Do not enable a restart of the drive until all work on the device has been completed in full.
Warning!
Risk of short circuit
Working on live parts can cause injuries and can compromise the function and the electrical
safety of the device.
•Before working on the device, always disconnect the supply voltage.
•Connect the device to the supply voltage only after completion of the work.
Caution!
Thread damage
Thread damage caused by tilting.
When tightening screws or other design elements with a thread, make sure that they can be
screwed without tilting into the receiving thread.

EN 11HD
nstallation
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5.2 Designations of the Rotary Encoder Parts
n the following diagram, you will find the designations of the most important components of the
rotary encoder. To avoid misunderstandings, these designations will be used in the following
sections.
Figure 5.1 Designation of the rotary encoder parts
Item Name
1 Rotary encoder flange
2 Threaded holes (M12 x M6, depth 16)
3 Rotary encoder cover
4 Support plate
5 Ground strap
6 Extension arm (consisting of threaded rod,
swivel heads and lock nuts)
7 Eyelet of the ground strap
8 Shaft clamping ring (only for the design with
continuous hollow shaft)
9 Rotary encoder shaft
10 Connector plug or cable duct
11 Connection box (rotatable in 90° increments)
12
3
4
5
6
7
8
9
10
11

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EN 11HD
nstallation
5.3 Assembling Hollow Shaft Rotary Encoders (General)
Preventing Malfunctions
Correct mounting of the rotary encoder on the drive shaft, as well as the torque rest, is required
for the rotary encoder to function correctly. When assembling a hollow shaft rotary encoder,
observe in particular the following points:
•Do not apply force when attaching the hollow shaft rotary encoder to the drive shaft. Do
not attempt to bring the rotary encoder into position by hitting it with a hammer or other
tool. Ensure that the diameters of the drive shaft and rotary encoder shaft match. Remove
any flash rust from the drive shaft and grease the shaft a little.
•Mount the torque rest so that it is free from play. Any play in the torque rest can result in an
increased angle error and wear in operation.
•Radial deviations of the motor shaft lead to radial movement of the rotary encoder during
operation. As the rotary encoder is fixed mechanically in the direction of the mounted
extension arm, radial deviations of the drive shaft inevitably lead to rotations of the rotary
encoder and thus to an angle error.
An angle error caused in this way can be reduced by increasing the radius R, where R is
the radial distance of the attachment point of the extension arm on the rotary encoder side
from the rotational axis. The dimension R is specified by the dimensions of the support
plate.
Figure 5.2 Shaft concentricity
The angle error is calculated as follows:
Angle error = ±90°/ * run-out error [mm]/R [mm]
R

EN 11HD
nstallation
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5.3.1 Preparation of the Rotary Encoder for Shaft Mounting (All Types)
The instructions show the preparatory steps using the example of a rotary encoder with contin-
uous hollow shaft. Preparation is identical for all types of rotary encoders described here. Pre-
pare the rotary encoder for shaft mounting as follows:
Grounding
1. Connect the ground strap to the bare metal rotary encoder cover. Select any M6 threaded hole.
Figure 5.3 Connecting the ground strap to the rotary encoder
2. Attach the grounding label next to the connection point of the ground strap on the rotary
encoder cover.
Item Name
1 Rotary encoder
2 Contact disk for M6 (D N 25511)
3 Ground strap with eyelet
4 Washer for M6 (D N 125A)
5 M6 x 12 screw (D N 933)
6 Size 10 open-end wrench (not included in the scope of delivery)
7 Grounding label
1
2 3
6
4 5
7

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EN 11HD
nstallation
Mounting the Torque Rest
The torque rest consists of the support plate and extension arm.
Note:
Depending on the customer's requirements, the support plate can be mounted on the front
rotary encoder flange or on the rear rotary encoder cover.
1. Determine the best arrangement for the support plate and the tie rod. The arrangement must
be chosen such that, when the rotary encoder is later mounted on the drive shaft, the tie rod
and the center axis of the support plate form a right angle, or as close as you can get to a right
angle. The deviation from the right angle () should be less than 15°, see chapter 5.3.5.
Figure 5.4 The angle between the support plate and the tie rod should be about 90°.
2. Mount the support plate on the rotary encoder flange at the point corresponding to the most
favorable position of the torque rest determined previously.
3. Mount the extension arm on the support plate, see Figure 5.5 on page 14.
Warning!
Damage to the swivel head
When mounting the extension arm, tighten the self-locking nut on the screw
that leads through the socket of the swivel head to a torque of 1 Nm ... 2 Nm.
This will prevent the plastic socket of the swivel head from being crushed.
Tightening the nuts to a torque exceeding this amount may damage the swivel
head.


~90°

EN 11HD
nstallation
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Figure 5.5 Mounting of the support plate and extension arm on the rotary encoder
The rotary encoder is now ready to be mounted on the drive shaft.
Item Name
1 Rotary encoder
2 Extension arm
3 Support plate
4 Washer for M6 (D N 125A), 2 units
5 M6 x 12 hexagon head screw (D N 933), 2 units
6 M6 nut, self-locking (D N 982)
7 Size 10 open-end wrench (not included in the scope of delivery)
8 Spacer
9, 10 Washer for M6 (D N 125A)
11 M6 x 25 hexagon head screw (D N 933)
17 7
8 9
2
11
10
3
45
45
6

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EN 11HD
nstallation
5.3.2 Shaft Mounting (Rotary Encoder with Continuous Hollow Shaft)
When assembling a rotary encoder with continuous hollow shaft, proceed as follows:
1. Loosen the screw on the shaft clamping ring of the rotary encoder.
2. Slide the rotary encoder onto the drive shaft.
3. Tighten the screw on the shaft clamping ring of the rotary encoder to a torque of 2 Nm ... 2.5
Nm.
The rotary encoder is now fixed on the drive shaft.
5.3.3 Shaft Mounting (Rotary Encoder with Recessed Hollow Shaft)
Specification of the drive shaft
Figure 5.6 Drive shaft specification
When mounting a rotary encoder with recessed hollow shaft, proceed as follows:
1. Lightly lubricate the O-ring on the inside of the rotary encoder shaft.
2. Loosen the rotary encoder cover (four captive screws). Make sure that the inserted O-ring does
not become damaged or lost.
Note
Rotary encoders with a recessed hollow shaft do not have a shaft clamping ring. Mounting to
the drive shaft is through a central mounting screw. The drive shaft must have an M6 threaded
hole on the face side for this purpose. The drive shaft must have a shoulder on which the
conical centering ring is supported.
55
16
M6
d + 6
ø dg6
Note
The mounting set included in the scope of delivery with the rotary encoder
contains several mounting screws (M6 with hexagon socket, D N 912) in
graduated lengths. Select the appropriate mounting screw depending on the
length of the drive shaft. To determine the appropriate screw length see
see Figure 5.6 on page 16.

EN 11HD
nstallation
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Figure 5.7 Dismounting the rotary encoder cover
3. Check the drive shaft. The drive shaft must be clean and free from grease, rust, and burrs.
. Slide the tapered mounting adapter onto the drive shaft. The taper points to the rotary encoder,
and the flat area is located on the shaft collar.
5. Carefully slide the rotary encoder over the drive shaft until you feel slight resistance through the
inner O-ring in the rotary encoder. Now carefully slide the rotary encoder over the drive shaft as
far as it will go.
6. Place a washer over the selected mounting screw of suitable length.
7. nsert the mounting screw into the central hole on the back of the rotary encoder.
Item Name
1 Rotary encoder
2 Rotary encoder cover
3 3 mm hexagon wrench (not included in the
scope of delivery)
4 Four captive M4 hexagon socket cap head
screws (D N 912)
1 2 3
4

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EN 11HD
nstallation
8. Secure the rotary encoder shaft with a size 27 open-end wrench. Now turn the mounting screw
into the thread on the face side of the drive shaft and tighten to a torque of 6 Nm.
Figure 5.8 Mounting of a rotary encoder with recessed hollow shaft (the rear rotary encoder cover is
already removed in the illustration)
The rotary encoder is now bolted to the drive shaft.
9. Fit the rotary encoder cover with four screws. Make sure that the O-ring is correctly positioned
in the groove provided.
Item Name
1 Drive
2 Rotary encoder with recessed hollow shaft
3 Drive shaft with shoulder
4 Mounting adapter
5 Recessed hollow shaft
6 Washer for M6 (D N 125A)
7 Mounting screw of suitable length, hexagon socket (D N 912)
8 4 mm hexagon wrench
9 Size 27 open-end wrench
12 9
876
54
3

EN 11HD
nstallation
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5.3. Shaft Mounting (Rotary Encoder with Tapered Shaft)
Specification of the drive shaft
Figure 5.9 Specification of the drive shaft
When mounting a rotary encoder with tapered shaft, proceed as follows:
1. Loosen the rotary encoder cover (four captive screws). The inserted O-ring must not become
damaged or lost.
Figure 5.10 Dismounting the rotary encoder cover
2. Slide the rotary encoder over the tapered drive shaft as far as it will go.
Note
Rotary encoders with a tapered shaft do not have a shaft clamping ring. Mounting to the drive
shaft is through a central mounting screw. The drive shaft must have an M6 threaded hole on
the face side for this purpose. The drive shaft must have a tapered end. The slope of the taper
must be 1:10.
ø17
20
M6 x 16
1:10
Item Name
1 Rotary encoder
2 Rotary encoder cover
3 3 mm hexagon wrench (not included in the
scope of delivery)
4 Four captive M4 hexagon socket cap head
screws (D N 912)
1 2 3
4

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EN 11HD
nstallation
3. Slide a washer for M6 over the M6 x 30 screw.
. nsert the M6 x 30 screw through the central hole on the back of the rotary encoder.
5. Secure the rotary encoder shaft with a size 27 open-end wrench. Now turn the M6 x 30 screw
into the thread on the face side of the tapered drive shaft and tighten to a torque of 3 Nm ... 4
Nm.
Figure 5.11 Mounting a rotary encoder with tapered shaft
The rotary encoder is now bolted to the tapered drive shaft.
6. Fit the rotary encoder cover with four screws. Make sure that the O-ring is correctly positioned
in the groove provided.
Item Name
1 Drive
2 Rotary encoder with tapered shaft
3 Tapered drive shaft
4 Tapered shaft
5 Washer for M6 (D N 125A)
6 M6 x 30 hexagon socket cap head screw (D N 912)
7 4 mm hexagon wrench (not included in the scope of delivery)
8 Size 27 open-end wrench (not included in the scope of delivery)
12 8
765
4
3