Product Information

ECI 4090 S
Absolute Rotary Encoderwith 180 mm Hollow Shaft
and DRIVE-CLiQ Interface for
Safety-Related Applications
Firmware 1504/2024

ECI 4090 S
Rotary encoder for absolute position values with safe singleturn information• Robust inductive scanning principle• Hollow through shaft (¬ 180 mm)• Consists of a scanning unit and scale drum

Shown withcustomer's side 

Required mating dimensions = Bearing of mating shaft
M1 = Measuring point for operating temperature
M2 = Measuring point for vibration on scanning unit
1 = Marking of the 0° position ±5°
2 = Slot for machine key: DIN 6885 – A – 10 x 8 x 20
3 = Machine key: DIN 6885 – A – 10 x 8 x 20
4 =	Maximum permissible axial deviation between the shaft surface and flange surface;compensation of mounting tolerances and thermal expansion; dynamic motion permitted over entire range
5 =	Fastening screws: ISO 4762 – M4 x 25 – 8.8; tightening torque: 2.2 Nm ±0.13 Nm; a suitable material bonding anti-rotation lock must be used forthe screw connection (e.g., screw with material bonding anti-rotation lock: ISO 4762 – M4 x 25 – 8.8 MKL as per DIN 267-27, ID 202264-88).
6 = Space required when encoder cover is closed
7 = Space required for opening the encoder cover
8 = Coaxiality of stator mating surface
9 = Chamfer at start of thread is mandatory for material bonding anti-rotation lock
10 = Bearing surface of stator
11 = Bearing surface of rotor
12 = Direction of shaft rotation for ascending position values
13 = The mating surface does not need to be fully covered by the scanning unit in this area2Product Information ECI 4090 S   04/2024Specifications

ECI 4090 S singleturn

Functional safetyfor applications with up toAs 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 as per EN ISO 13849-1:2015
Safe in the singleturn rangePFH1)

SIL 2:  27 · 10–9 (probability of dangerous failure per hour)

Safe position2)

Encoder: ±0.44° (safety-related measuring step: SM = 0.176°)
Mechanical coupling: ±0.5° (fault exclusion for the loosening of AE scanning unit andTTR scale drum, designed for acceleration of AE:  400 m/s2; of TTR:  600 m/s2)

Interface

DRIVE-CLiQ

Ordering designation

DQ01

Firmware01.32.27.15

SINAMICS, SIMOTION3) V4.6 HF3SINUMERIK with safety3)

 V4.7 SP1 HF1SINUMERIK without safety3)

 V4.5 SP2 HF4Position values per revolution

1 048 576 (20 bits)

Calculation time
TIME_MAX_ACTVAL4)

 11 µs

System accuracy±40”

Electrical connection

15-pin PCB connector (with connection for external temperature sensor5))

Cable length6)

 40 m (see description in the Interfaces of HEIDENHAIN Encoders brochure)Supply voltage

DC 24 V (10 V to 28.8 V); up to 36 V possible without limiting functional safetyPower consumption7) (max.)

At 10 V:  1100 mW; at 28.8 V:  1250 mW

Current consumption (typical)

At 24 V: 40 mA (without load)

Shaft

Hollow through shaft ¬ 180 mm (with keyway)

Shaft speed 6000 rpm

Moment of inertia of rotor

3.1 · 10–3 kgm2 (without screws, without key)

Angular acceleration of rotor 2 · 104 rad/s2

Axial motion of measured shaft

 ±1.5 mm1)

For use at an elevation of ≤ 1000 m above sea level	Further tolerances may arise in the downstream electronics after position value comparison (contact mfr. of the downstream electronics)3)	Information from Siemens as per the document “Certified encoders with DRIVE-CLiQ Dependencies on SIMOTION / SINUMERIK andSINAMICS Hardware and Software versions” (version: 04/2019)4)	The calculation time TIME_MAX_ACTVAL specifies the time after which a data transfer from the encoder to the control can start within
the current-regulator clock time5)
See Temperature measurement in motors in the Encoders for Servo Drives brochure6)
With an output cable length (inside the motor) ≤ 1 m7)
See General electrical information in the Interfaces of HEIDENHAIN Encoders brochure2)

DRIVE-CLiQ is a registered trademark of Siemens AG.

Product Information ECI 4090 S   04/2024

3

MountingSpecifications

ECI 4090 S singleturn8)22Vibration 55 Hz to 2000 Hz
Shock 6 ms

AE scanning unit:  400 m/s ; TTR scale drum:  600 m/s (EN 60068-2-6)
 2000 m/s2 (EN 60068-2-27)

Operating temperature–40 °C to 100 °C (at the measuring point and on the entire scale drum)

Trigger threshold for exceeded
temperature error message

120 °C (measuring accuracy of the internal temperature sensor: ±1 K)

Relative humidity

 93 % (40 °C/21 d as per EN 60068-2-78); condensation excluded

Protection rating EN 60529

Complete encoder, mounted: IP209); AE scanning unit: IP40 (read about insulation under Electricalsafety in the Interfaces of HEIDENHAIN Encoders brochure)

MassAE scanning unit: ≈ 0.39 kg; TTR scale drum: ≈ 0.33 kg

ID number

AE ECI4090S scanning unit: ID 1087527-048)
9)

TTR EXI4000 scale drum: ID 1113606-02

AE scanning unit: 10 Hz to 55 Hz, 6.5 mm constant peak to peak; TTR: 10 Hz to 55 Hz, 10 mm constant peak to peak
In the application, the encoder must be protected from abrasive and harmful media; use an appropriate enclosure as needed

The scale drum of the rotary encoder ispressed onto the measured shaft’s centeringcollar and fastened. The stator is mounted
via an external centering diameter. Usescrews with material bonding anti-rotation
lock (see Mounting accessories).

For the fault exclusion design for functionalsafety, the following material properties
and conditions for the mating surfaces areassumed. Four possible material combinations
are permitted for the customer-side statorand rotor.

MaterialAluminum

Hardenable wrought
aluminum alloy

SteelTensile strength Rm≥ 220 N/mm2≥ 600 N/mm2

Yield strength Rp0.2 oryield point Re–≥ 400 N/mm2

Shear strength τa≥ 130 N/mm2≥ 390 N/mm2

Interface pressure PG≥ 250 N/mm2≥ 660 N/mm2

Unalloyed heat-treatedsteel

Modulus of elasticity E (at 20 °C) 70 kN/mm2 to 75 kN/mm2

200 kN/mm2 to 215 kN/mm2Coefficient of thermal expansion ≤ 25 · 10–6 K–1
atherm (at 20 °C)

10 · 10–6K–1 to17 · 10–6K–1

Surface roughness RZ≤ 16 µmFriction values

Mounting surfaces must be clean and free of grease. Use screws from HEIDENHAIN in theirdelivery condition.

Tightening procedure

Use a signal-emitting torque wrench as per DIN EN ISO 6789,
with an accuracy of ±6%

Mounting temperature

15 °C to 35 °C

Protection from contact (EN 60529)
After encoder installation, all rotating parts must be protected from accidental contact
during operation.

4

Product Information ECI 4090 S   04/2024

Product Information ECI 4090 S   04/2024

5Electrical requirements

Mounting accessories

Switch-on and switch-off conditions

ScrewsScrews are not included in delivery and can be ordered separately.
ScrewsMounting screws
for stator and rotor

ISO 4762-M4×25-8.8-MKL

SwitchonStart-up

Lot size

Ready for operation

36 V (without limitingfunctional safety)

ID 202264-88 60 or 300

With coating for material bonding anti-rotation lockTyp. 15 s
28.8 VUP1)

Off(at the encoder)1)

ECI 4090 S

Operation Switchoff

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.

UP min.

KeyThe machine key is not included in delivery.
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.

dU > 50 V
dtsdU <−50 Vs
dtt> 100 ms

ID 1075573-01

Uoff < 2 VFor further mounting information and mounting aids, please refer to the Encodersfor Servo Drives brochure.

Integrated temperature evaluation

These rotary encoders feature an internal
temperature sensor integrated into theencoder electronics, as well as an evaluation
circuit for an external temperature sensor.
In both cases, the respective digitized
temperature value is transmitted purely
serially via the DRIVE-CLiQ interface. Pleasebear in mind that neither the temperature
measurement nor the transmission of thetemperature value is “safe” in terms offunctional safety.
The temperature measured by the internal
temperature sensor is higher by a devicespecific and application-specific amount than
the temperature at measuring point M1, asshown in the dimension drawing.

Upon reaching a trigger threshold forthe internal temperature sensor, theserotary encoders issue an “Alarm 135”
error message. This threshold may varydepending on the device and is statedin the specifications.

For a PT1000, the following values apply
with regard to the accuracy of theevaluation circuit:±6 K at –40 °C to 80 °C±4 K at 80.1 °C to 160 °C±6 K at 160.1 °C to 200 °C

During operation, it is recommended
that the temperature be kept adequately
below this threshold. Fulfillment of theencoder’s intended use requires adherence
to the operating temperature at measuring
point M1.

For a KTY 84-130 semiconductor sensor,
the following values apply with regard to
the accuracy of the evaluation circuit:±6 K at –40 °C to 80 °C±3 K at 80.1 °C to 160 °C±6 K at 160.1 °C to 200 °C

Temperature measurement in motors
To protect a motor from overloading, themotor manufacturer usually installs atemperature sensor in close proximity to
the motor winding. A PT 1000 temperature
sensor or a KTY 84-130 semiconductor
sensor, for example, is to be used for thispurpose.

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., Startersoftware) of the drive.

DRIVE-CLiQ is a registered trademark of Siemens AG.

6

Product Information ECI 4090 S   04/2024

Product Information ECI 4090 S   04/2024

7

Online diagnostics and firmware version

For evaluation of the encoder’s functionality,valuation numbers can be cyclically readfrom the encoder. These valuation numbers
reflect the current status of the encoder
and can be used to determine its function
reserves. The function reserves are alsotransmitted via the DRIVE-CLiQ interface andcan be displayed in the higher-level control.
Further information is available fromHEIDENHAIN upon request.

Electrical connection: pin layout

Pin layout of the ECIThe firmware version can be read via theDRIVE-CLiQ parameter “Act_FW_Version”(index 0). The final two digits of the displayed
value are decisive.

8-pin
M12 coupling

9-pin
M23 right-angle
socket15-pin
PCB connector

Power supply1)

Serial data transmission

Other signals

M1282513476//

M2337485612//

15131114

127

89105

6––0V

UPRXPRXN

TXP

TXNT+2)

T–2)

Brown/
GreenBlueWhite/
GreenWhite

Gray

Pink

VioletYellowBrownGreen1)

Only with output cables inside the motor housing	Connections for an external temperature sensor (depending on the output cable inside the motor housing; see Temperature
measurement in motors in the Encoders for Servo Drives brochure)2)

Cable shield connected to housing; UP = Power supply voltage
Note about safety-related applications: use only sufficiently qualified, completely assembled DRIVE-CLiQ cables from HEIDENHAINor Siemens. Do not modify or assemble cables without first consulting with HEIDENHAIN Traunreut!
Vacant pins or wires must not be used!

8

Product Information ECI 4090 S   04/2024

Product Information ECI 4090 S   04/2024

9

Electrical connection

CablesEPG output cables inside the motor housing ¬ 3.7 mm; 2(2 x 0.06) + (4 x 0.06) mm2; AP = 0.06 mm2 with shield crimping ¬ 4.3 mm
With 15-pin PCB connector and9-pin M23 SpeedTEC angle flange socket (male);wires for temperature sensor1)

ID 1125403-N32); length: 0.3 m

With 15-pin PCB connector and9-pin M23 SpeedTEC angle flange socket (male)

ID 1125408-N3 ; length: 0.3 m

With 15-pin PCB connector and8-pin M12 coupling (male)

ID 1160559-01 ; length: 1 m2)

3)

1)

The electromagnetic compatibility of the complete system must be ensured
Operating temperature range (conditional): –20 °C to 120 °C3)
Operating temperature range (conditional): –40 °C to 85 °C2)

PUR connecting cables  6.8 mm; 2(2 x 0.17 mm2) + (2 x 0.24 mm2); AP = 0.24 mm2With 8-pin M12 connector (female) and8-pin M12 coupling (male)

ID 822504-xx

With 8-pin M12 connector (female) and
RJ45 connector (IP67)

ID 1094652-xx

With 8-pin M12 connector (female) and
RJ45 connector (IP20)

ID 1093042-xx

With 9-pin M23 SpeedTEC connector (female)and RJ45 connector (IP20)

ID 1121546-xx

With 9-pin M23 SpeedTEC connector (female)and 8-pin M12 coupling (male)

ID 1121536-xx

AP: Cross section of power supply lines
Output cables may require strain relief. Always provide strain relief for cable lengths > 0.5 m.

SpeedTEC is a registered trademark of Intercontec Pfeiffer Industriesteckverbindungen GmbH.
DRIVE-CLiQ is a registered trademark of Siemens AG.

DR. JOHANNES HEIDENHAIN GmbH
Dr.-Johannes-Heidenhain-Straße 583301 Traunreut, Germany +49 8669 31-0
 +49 8669 32-5061
info@heidenhain.dewww.heidenhain.com

1214309 · 03 · A · 02 · 04/2024 · 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:• Brochure: Encoders for Servo Drives
ID 208922-xx• Brochure: Cables and Connectors
ID 1206103-xx• Mounting instructions: AE ECI4090SID 1214406-xx• Mounting instructions: TTR EXI4000
ID 1214404-xx• Brochure: Interfaces of HEIDENHAIN Encoders
ID 1078628-xx