Product Information

ECN 1123 S
EQN 1135 S
Absolute Rotary Encoders
with DRIVE-CLiQ Interface for
Safety-Related Applications
Firmware 5301/2023

ECN 1123 S, EQN 1135 S
Rotary encoders for absolute position values with safe singleturn information• 75A mounted stator coupling• 1KA blind hollow shaft (¬ 6 mm) for axial clamping

Specifications

ECN 1123 S singleturn

Functional safetyfor applications with up to

As a single-encoder system for monitoring functions and closed-loop functions• SIL 2 as per EN 61508 (further basis for testing: IEC 61800-5-3)• Category 3, PL d, in accordance with EN ISO 13849-1:2015
Safe in singleturn operation

PFH1)≤ 27 · 10–9 (probability of dangerous failure per hour)
2)

13

12

Safe position

Encoder: ±1.76° (safety-related measuring step SM = 0.7°)
Mechanical coupling: ±2° (fault exclusion for the loosening of the shaft coupling and stator
coupling, designed for accelerations ≤ 300 m/s2)

Interface/ordering designation

DRIVE-CLiQ / DQ01

Firmware01.32.26.53
3)

11

EQN 1135 S multiturn

Siemens software
Firmware 01.32.26.53

SINAMICS, SIMOTION: ≥ V4.4 HF4;
SINUMERIK with safety: ≥ V4.4 SP2; SINUMERIK without safety: ≥ V4.4 SP1 HF3Position values per revolution

8 388 608 (23 bits)

Revolutions–4)4096 (12 bits)

Calc. time TIME_MAX_ACTVAL≤ 8 μsSystem accuracy at 20 °C±60"Electrical connection

15-pin PCB connector (with connection for external temperature sensor )Cable length≤ 40 m (see Cable lengths in the Cables and Connectors brochure)Supply voltage

DC 24 V (10 V to 28.8 V); up to DC 36.0 V possible without compromising functional safety

Power consumption (max.)

At 10 V: ≤ 850 mW; at 28.8 V: ≤ 900 mW

At 10 V: ≤ 950 mW; at 28.8 V: ≤ 1000 mW

Current consumption (typical)

At 24 V: 32 mA (without load)

At 24 V: 35 mA (without load)

Shaft

1KA blind hollow shaft (¬ 6 mm) with positive-locking element14 3.5 ± 0.1–0.3

Required mating dimensions≥9≥ 3.55





+0.3

≥ 11

≥ 2.3–0.26)

0.06 B 0.06 A(L2  E1  E2 E3
L3  E4 E5 E6 E7)400.05 A
0.1 A

0.02 A E2 E3
 E1

Encoder
Encoder flange/Geberﬂansch/
Encoder shaft Schnittstelle
Interface
Series Gebername
Baureihe
Geberwelle
Statorkupplungname
stator coupling

E1

ECN/EQN

75A

1KA

E2/E3

ECI/EQI

70C

1KA/82A

E4/E6

ECI/EQI

70F

82A

E5
E7

ECI/EQIECI/EBI

70F
70E

L2L3

EnDat01/22 2 ± 0.5–
DQ01
EnDat22/ 2 ± 0.4–
E30-R2
EnDat22/0±0.4–
E30-R2–
EnDat01
0 ± 0.3
EnDat22–0 ± 0.3

Speed≤ 12 000 rpm

Starting torque (typical)

0.001 Nm (at 20 °C)

Moment of inertia of rotor

0.34 · 10

Angular acceleration of rotor≤ 1.0 · 105 rad/s2

Axial motion of measured shaft≤ ±0.5 mm

Natural frequency fN (typical)≥ 1000 Hz

Vibration 55 Hz to 2000 Hz
Shock 6 ms2≤ 200 m/s (EN 60068-2-6); 10 Hz to 55 Hz, 3.2 mm constant peak to peak
≤ 2000 m/s2 (EN 60068-2-27)

Operating temperature–40 °C to 95 °C–60.002 Nm (at 20 °C)

kgm2

Trigger threshold of error message 125 °C (measurement accuracy of the internal temperature sensor: ±7 K at 125 °C)
for excessive temperature

45°≤  7.582A82C
 = Bearing of mating shaft
M1 = Measuring point for operating temperature
M2 = Measuring point for vibration
1.6 ± 0.1
1 = Contact surface of slot
2 = Chamfer at start of thread is mandatory for material bonding anti-rotation lock
≤ 0.4
3 = Shaft surface; ensure full-surface contact!
4 = Slot required only for ECN/EQN and ECI/EQI with WELLA1 = 1KA
5 = ExI flange surface; ensure full-surface contact!
6 = Coupling surface of ECN/EQN
7 =	Maximum permissible deviation between the shaft surface and coupling surface;compensation of mounting tolerances and thermal expansion,of which ±0.15 mm of dynamic axial motion is permitted
8 =	Maximum permissible deviation between shaft and flange surfaces.
Compensation of mounting tolerances and thermal expansion
9 = Undercut≤ 0.7
10 = Possible centering hole
11 = 15-pin PCB connector
12 = Cable fastener with crimp sleeve; diameter: 4.3 mm ±0.1 mm; length: 7 mm
13 = Positive locking element; ensure correct engagement in Slot 4 (e.g., by measuring the device overhang)
14 = Direction of shaft rotation for ascending position values
15 = Uncoated; shaft coating not permitted

20.01 A

2.3 ± 0.1

E4 E5 E6 E7

 6g7

3 +0.109.4

 9.3 ≤ D ≤  14≥43

 36.8E7

0.05 A+0.2







90°...120°

2G10

 0.1 D



2 ± 0.1

M3M32x5)

10

 4.5 ± 0.1

15

 3.2 ± 0.1

60°Product Information ECN 1123 S, EQN 1135 S   01/2023

Relative humidity≤ 93% (40 °C/21 d as per EN 60068-2-78), without condensation

Protection rating EN 60529

IP40 (read about insulation under Electrical safety in the Interfaces of HEIDENHAIN Encoders
brochure; contamination from the ingress of liquid must be prevented)

Mass 0.07 kg

ID number1211015-021)

For use at ≤ 1000 m above sea level (≤ 6000 m above sea level upon request)
Further tolerances may arise in the downstream electronics after position
value comparison (contact manufacturer)
3)
Information from Siemens as per the document “Certified encoders with
DRIVE-CLiQ Dependencies on SIMOTION / SINUMERIK and SINAMICS
Hardware and Software versions”
2)

Product Information ECN 1123 S, EQN 1135 S   01/2023

1211017-024)

 he calculation time TIME_MAX_ACTVAL specifies theTtime after which a data transfer from the encoder to thecontrol can start within the current-regulator clock time.
5)See Temperature measurement in motors in theEncoders for Servo Drives brochure.
6)
At ≥ 2 position requests per revolution

3Mounting

Integrated temperature evaluation

The blind hollow shaft of the rotary encoder is seated onto the measured shaft andfastened with a central screw. It is particularly important to ensure that the positive-locking
element of the rotary encoder shaft securely engages the corresponding slot in themeasured shaft. Mounting on the stator side is performed without a centering collar on aflat surface with two clamping screws. Use screws with material bonding anti-rotation
lock (see Mounting accessories).

These rotary encoders feature a temperature sensor integrated
into the encoder electronics and an evaluation circuit for an
external temperature sensor. In both cases, the respective
digitized temperature value is transmitted purely serially via theDRIVE-CLiQ interface. Please bear in mind that neither thetemperature measurement nor the transmission of thetemperature value is safe in terms of functional safety.
The temperature measured by the internal temperature sensor ishigher by a device-specific and application-specific amount than
the temperature at measuring point M1, as shown in thedimension drawing.
Upon reaching a trigger threshold for the internal temperature
sensor, these rotary encoders issue an “Alarm 405” error message.
This threshold may vary depending on the encoder model and isstated in the specifications. During operation, it is recommended
that the temperature be kept adequately below this threshold.

Mounting accessories
ScrewsScrews (central screw, mounting screws) are not included in delivery and can be orderedseparately.
Screws1)

Lot size

ISO 4762-M3×22-8.8-MKL

ID 202264-65

Central screw for EQN 1135 ISO 4762-M3×35-8.8-MKL

ID 202264-66

ISO 4762-M3×10-8.8-MKL

ID 202264-87

Central screw for ECN 1123

Fastening screwfor flange1)

10 or 100

20 or 200

More information:
For the customer-side mounting design,
the material properties and conditions inaccordance with the General mechanicalinformation in the Encoders for ServoDrives (ID 208922-xx) brochure must becomplied with.

Fulfillment of the encoder’s intended use requires adherence tothe operating temperature at measuring point M1.
The internal temperature sensor has an accuracy of ±7 K.

Temperature measurement in motors
To protect a motor from overloading, the motor manufacturer
usually installs a temperature sensor in close proximity to themotor winding.
A PT 1000 temperature sensor or a KTY 84-130 semiconductor
sensor, for example, is to be used for this purpose. For a PT 1000,
the following values apply with regard to the accuracy of theevaluation circuit:±4 K at 80 °C to 160 °C±6 K at –40 °C to 80 °C±6 K at 160 °C to 200 °C
For a KTY 84-130 semiconductor sensor, the following values apply
with regard to the accuracy of the evaluation circuit:±2 K at 80 °C to 160 °C±6 K at –40 °C to 80 °C±6 K at 160 °C to 200 °C
The temperature values are transmitted via the DRIVE‑CLiQ
protocol.
The temperature sensor used is adjustable via Parameter 601 in
the configuration software (e.g., Starter software) of the drive.

The material specifications for aluminumand steel apply both to the customer-side
shaft and stator.

With coating for material bonding anti-rotation lock

Please note the information on screws from HEIDENHAIN in the Encoders for Servo
Drives brochure, under the heading Screws with material bonding anti-rotation lock in thechapter General mechanical information.
Mounting aid
To avoid damage to the cable, use the mounting aid to connect and disconnect the cable
assembly. The pulling force must be applied solely to the connector and not to the wires.
ID 1075573-01
Mounting aid
The mounting aid allows the shaft of the rotary encoder to be turned from the rear of thedevice, making it easy to find the positive-locking connection between the encoder shaft
and the measured shaft.
ID 821017-03

4

Product Information ECN 1123 S, EQN 1135 S   01/2023

Product Information ECN 1123 S, EQN 1135 S   01/2023

5

Online diagnostics and firmware version

Electrical connection

Online diagnostics
For evaluation of the encoder’s functionality, valuation numbers
can be cyclically read from the encoder. These valuation numbers
reflect the current status of the encoder and can be used todetermine its function reserves. The function reserves are alsotransmitted via the DRIVE-CLiQ interface and can be displayed inthe higher-level control.

Cable
EPG encoder cable inside the motor ¬ 3.7 mm; 2 × (2 × 0.06 mm2 ) + 4 × 0.06 mm2; AP = 0.06 mm2With shield crimping (¬ 4.3 mm) and wires for a temperature sensor1) TPE 2 × 0.16 mm2With 15-pin PCB connector and 8-pin LK28
M12 flange socket (male)2)
1)

Further information is available from HEIDENHAIN upon request.

2)

ID 1217143-xx

Electromagnetic compatibility must be ensured in the complete system
The shield connection must be implemented on the motor sideFirmware version
The firmware version can be read out via the DRIVE-CLiQ
parameter “Act_FW_Version” (index 0). The final two digits of thedisplayed value are decisive.

Pin layout
8-pin M12 flange socket

15-pinPCB connector

Power supply
M12151)
2)

1)

Serial data transmission

Other signals

8251

3

4

76/

/

131114

12

7

8

910

5

6

––0V

UPRXP

RXN

TXP

TXN

T+2)

T–2)

Brown/
GreenBlueWhite/GreenWhite

GrayPink

VioletYellow

BrownGreenOnly with output cables inside the motor housing
Connections for external temperature sensor; evaluation optimized for KTY 84-130 (see Temperature measurement in motors in theEncoders for Servo Drives brochure)

Cable shield connected to housing; UP = Power supply voltage
Vacant pins or wires must not be used!
Output cables with a cable length > 0.5 m require strain relief for the cable.
DRIVE-CLiQ is a registered trademark of Siemens AGDR. JOHANNES HEIDENHAIN GmbH
Dr.-Johannes-Heidenhain-Straße 583301 Traunreut, Germany +49 8669 31-0
 +49 8669 32-5061
info@heidenhain.dewww.heidenhain.com

6

Product Information ECN 1123 S, EQN 1135 S   01/2023

1390728 · 00 · A · 02 · 01/2023 · PDF

This Product Information document supersedes all previous editions, which thereby
become invalid. The basis for ordering from HEIDENHAIN is always the Product
Information document edition valid when the order is placed.
More information:
Comply with the requirements described in the following documents to ensure correctand intended operation:• Operating Instructions
1390322-xx