Product Information

ECI 1119
EQI 1131
Absolute Rotary
Encoders without
Integral Bearing
Suitable for safety-related
applications up to SIL 3
when coupled withadditional measures

10/2018

ECI 1119, EQI 1131
Rotary encoders for absolute position values with safe singleturn information• Rugged inductive scanning principle• Mounting-compatible with photoelectric rotary encoders with 75A stator coupling• 70C mounting flange• Ø 6 mm blind hollow shaft for axial clamping with positive-locking element (1KA) orwithout (82A)• Required mating dimensions with M3×25 central screw andversion for customer cost optimization upon request
19.9  
 3.2
15

12.55  

2  

17 19
3.44  
12  
21.9  18(19.25)
22.25  

16

Required mating dimensions
9 3.55

9.4
          = Bearing of mating shaft
M1 = Measuring point for operating temperature
M2 = Measuring point for vibration
1 = Contact surface of slot
2 = Chamfer at start of thread is obligatory for materially bonding anti-rotation lock3 = Shaft surface; ensure full-surface contact!
4 = Slot required only for ECN/EQN and ECI/EQI with WELLA1 = 1KA 
5 = Flange surface ECI/EQI; ensure full-surface contact!
6 = Coupling surface ECN/EQN
7 = Maximum permissible deviation between shaft surface and coupling surface. Compensation for mounting tolerances and thermal expansion,of which ±0.15 mm of dynamic axial motion is permitted (ECN/EQN)
8 = Maximum permissible deviation between shaft surface and coupling surface. Compensation for mounting tolerances and thermal expansion;
dynamic motion permitted over entire range (ECI/EBI/EQI)
9 = Flange surface ECI/EBI; ensure full-surface contact!
10 = Undercut
11 = Possible centering hole
12 = Distance to cover; take the opening for pin header, socket connector, and wires into account13 = Screw: ISO 4762 – M3x10 – 8.8 – MKL, tightening torque: 1±0.1 Nm
14 = Screw ISO: 4762 – M3x25 – 8.8 – MKL, tightening torque: 1±0.1 Nm
15 = Positive-locking element; ensure correct engagement in slot (e.g., by measuring the device overhang)
16 = Direction of shaft rotation for ascending position values
17 = Pin header for 15 pins
18 = Dimension for JH standard cable
19 = Take installation space for cable into accountSpecifications

ECI 1119 – Singleturn

EQI 1131 – Multiturn

Valid for1KA shaft: ID 1164809-01/-51 1)
82A shaft: ID 1164809-02/-52 1)

1KA shaft: ID 1164811-01/-51 1)
82A shaft: ID 1164811-02/-52 1)

Functional safety
for applications up toAs single-encoder system for monitoring and closed-loop functions:• SIL 2 as per EN 61508 (further basis for testing: EN 61800-5-2)• Category 3, PL d as per EN ISO 13849-1:2015
With additional measures as per document 1000344 for safety-related applications up to SIL 3 orCategory 4, PL e
Safe in singleturn range

PFH

SIL 2: ≤ 15 · 10 –9 (probability of dangerous failure per hour)
SIL 3: ≤ 2 · 10 –9

Safe position 2)

Encoder: ±0.88° (safety-relevant measuring step: SM = 0.35°)
Mechanical coupling for 82A shaft: ±0°; for 1KA shaft: ±2° (fault exclusion forloosening of shaft coupling and stator coupling, designed for accelerations of≤ 400 m/s 2 on the stator and ≤ 600 m/s 2 on the rotor)

Interface

EnDat 2.2

Ordering designation

EnDat22

Position values/per rev.

524 288 (19 bits)

Revolutions-Calculation time tcal
Clock frequency≤ 5 µs≤ 16 MHz

System accuracy±120"

Electrical connection

15-pin PCB connector (with connection for external temperature sensor 3) )Cable length≤ 100 m (see EnDat description in the Interfaces of HEIDENHAIN Encoders brochure)Supply voltage

DC 3.6 V to 14 V

Power consumption 4) (max.)

At 3.6 V: ≤ 650 mW; at 14 V: ≤ 700 mW

At 3.6 V: ≤ 750 mW; at 14 V: ≤ 850 mW

Current consumption (typical)

At 5 V: 95 mA (without load)

At 5 V: 115 mA (without load)

Shaft*

Blind hollow shaft for axial clamping, Ø 6 mm, with positive-locking element (1KA) or without (82A)

Speed≤ 15000 rpm

Moment of inertia of rotor

0.2 · 10 –6 kgm 2

Angular acceleration of rotor≤ 1 · 10 5 rad/s 2

Axial motion of measured shaft≤ ±0.4 mm

Vibration 55 Hz to 2000 Hz 5)
Shock 6 ms

Stator: ≤ 400 m/s 2 ; rotor: ≤ 600 m/s 2 (EN 60068-2-6)≤ 2000 m/s 2 (EN 60068-2-27)

Operating temperature–40 °C to 110 °C

Trigger threshold of error message
for excessive temperature

125 °C (measuring accuracy of internal temperature sensor: ±1 K)

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

Protection EN 60529

IP00 (see Insulation under General mechanical information in the Encoders for Servo Drives brochure;ensure CE conformity of the overall system through installation measures!)

Mass≈ 0.04 kg

*1)
2)
3)
4)
5)

4096 (12 bits)≤ 12000 rpm

Please select when ordering
Rotary encoders in collective package
Further tolerances may apply in the subsequent electronics after position value comparison (contact mfr. of the subsequent electronics)
See Temperature measurement in motors in the Encoders for Servo Drives brochure
See General electrical information in the Interfaces of HEIDENHAIN Encoders brochure
10 Hz to 55 Hz constant over 4.9 mm peak to peakMounting

The blind hollow shaft of the rotary encoder is slid onto the measured shaft and fastened witha central screw. For the 1KA rotary encoder shaft, it is particularly important to ensure that thepositive-locking element securely engages the corresponding slot in the measured shaft. The
stator is connected with two mounting screws via a centering diameter. In each case, usescrews with materially bonding anti-rotation lock (see Mounting accessories).
Requirements on the motor side for safe mechanical coupling:
Mating stator

Mating shaft

Material type

Hardenable wrought
aluminum alloy

Unalloyed hardened
steel

Tensile strength Rm≥ 220 N/mm 2≥ 600 N/mm 2

Yield strength Rp0.2 or yield point Re

Not applicable≥ 400 N/mm 2

Shear strength τa≥ 130 N/mm 2≥ 390 N/mm 2Interface pressure PG≥ 250 N/mm 2≥ 660 N/mm 2

Modulus of elasticity E (at 20 °C)≥ 70 kN/mm 2 to75 kN/mm 2≥ 200 kN/mm 2 to215 kN/mm 2

Coefficient of thermal expansion
αtherm (at 20 °C)≤ 25 · 10 –6 K –1

10 · 10 –6 K –1 to17 · 10 –6 K –1

Surface roughness RZ≤ 16 µm

Friction values

Mounting surfaces must be clean and free ofgrease. Use screws and washers in the condition
as delivered.

Tightening process

Use a signaling torque tool as per
DIN EN ISO 6789; accuracy ±6 %Mounting temperature

15 °C to 35 °C

Mounting Accessories
ScrewsScrews are not included in delivery. They can be ordered separately.
ECI 1119; EQI 1131

Screws 1)

Central screw for
fastening the shaft

ISO 4762-M3×25-8.8-MKL

ID 202264-86

10 or 100

Mounting screw forflangeISO 4762-M3×10-8.8-MKL

ID 202264-87

20 or 2001)

Lot size

With coating for material bonding anti-rotation lock

Please note the information on screws from HEIDENHAIN in the Encoders for Servo Drives
brochure, under Rotary encoders with functional safety in the General mechanical information
chapter.
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 only to the connector of the cable assembly, andnot to the wires.
ID 1075573-01
Mounting aid
This tool is for turning the encoder shaft from the rear, thereby making it easy to find thepositive-locking connection between the encoder shaft and the measured shaft.
ID 821017-03

For further mounting information and mounting aids, refer to the mounting
instructions and the Encoders for Servo Drives brochure. The installation can beinspected with the PWM 21 and the ATS software (see document 1082415).

Electrical connection – cables

Cables
Output cables inside the motor housing with wires for temperature sensor: TPE 8 × 0.16 mm 2 1)
Output cable with 15-pin PCB connector and 8-pin
straight M12 flange socket (male), with TPE wires
for temperature sensor

ID 1119952-xx 3)

Output cable with 15-pin PCB connector and 8-pin
straight M12 flange socket (male)

ID 804201-xx 3)

Output cable with 15-pin PCB connector andfree cable end (stripped), with TPE wires fortemperature sensor

ID 1119958-xx 3)

Output cable with 15-pin PCB connector and free
cable end (stripped)

ID 640055-xx

HMC 6 output cable: Ø 3.7 mm EPG 1 × (4 × 0.06 mm 2 2) ) + 4 × 0.06 mm 2
Output cable with 15-pin PCB connector andcontact insert for 6-pin HMC 6 hybrid connecting
element (male), with two wires for temperaturesensor1)
2)
3)

ID 1072652-xx

TPE single wires with heat-shrink tubing (without shield)
With cable clamp for shield connection
TPE single wires with braided sleeve (without shield)

Upon request, output cables inside the motor housing are available without wires for temperature sensor
Note for safety-related applications: Document the bit error rate as per Specification 533095!
PUR connecting and adapter cables Ø 6 mm; 2 × (2 × 0.09 mm²) + 2 × (2 × 0.16 mm²); AP = 2 × 0.16 mm 2
Connecting cable with 8-pin M12 connector(female) and 8-pin M12 coupling (male)

ID 1036372-xx

Adapter cable with 8-pin M12 connector (female)and 15-pin D-sub connector (female)

ID 1036521-xx

Adapter cable with 8-pin M12 connector (female)and 15-pin D-sub connector (male)

ID 1036526-xx

Connecting cable with 8-pin M12 connector(female) and free cable end (unstripped)

ID 1129581-xx 1)

AP:1)

Cross section of power supply lines
Connecting element must be suitable for the maximum clock frequency used

Note for safety-related applications: Document the bit error rate as per Specification 533095!

Electrical connection – pin layout

Pin layout
8-pin M12 coupling or
flange socket

15-pin PCB
connector

HMC 6 flange socket
KX
1

2

54

E

6

3

78E

DCX

ABEncoderPower supply1)
2)

Other signals 1)

Serial data transfer

M1282513476//

HMC
61/

2/

3456/

/

131114127891056UP

Sensor UP0VSensor 0 V

DATADATA

CLOCK

CLOCKT+ 2)

T– 2)

Brown/
GreenBlueWhite/
GreenWhite

Gray

Pink

VioletYellow

Brown

Green

Only for adapter cables within the motor
Connections for external temperature sensor; evaluation optimized for KTY 84-130 (see Temperature measurement in motors in theEncoders for Servo Drives brochure)MotorBrake

Power78ABC

DE

BRAKE–BRAKE+UVW/PEWhiteWhite/BlackBlue

Brown

Black/

Yellow/Green

External shield of the encoder output cable on communication element housing K.
Unused pins or wires must not be assigned!

1246793 · 00 · B · 02 · 10/2018 · PDF

This Product Information document supersedes all previous editions, which thereby
become invalid. The basis for ordering from HEIDENHAIN is always the ProductInformation document edition valid when the order is made.
Further information: Adhere to the information in the following documents toensure the correct and intended operation of the encoder:• Encoders for Servo Drives brochure: 208922-xx• Interfaces of HEIDENHAIN Encoders brochure: 1078628-xx• Mounting instructions for ECI 1119, EQI 1131: 1247146-xx• Safety-Related Position Measuring Systems Technical Information document 596632• For implementation in a safe control or inverter, refer to Specification 533095 and theSupplementary Catalog of Measures (SIL 3, PL e): 1000344