Product Information

ECI 1319
EQI 1331

Absolute Rotary Encoders
without Integral Bearing

With additional measures:suitable for safety-related
applications with up to SIL 3
For HMC 2 connection
technology

01/2023ECI 1319, EQI 1331
Rotary encoders for absolute position values with safe singleturn information• Robust inductive scanning principle• Mounting-compatible with photoelectric rotary encoders with a 07B stator coupling• 0YA mounting flange• Blind hollow shaft for axial clamping ¬ 12.7 mm (44C) or ¬ 12 mm (44A)• Cost-optimized mating dimensions upon request

Required mating dimensions

90°...120°

90°...120°

 = Bearing of mating shaft
M1 = Measuring point for operating temperature
M2 = Measuring point for vibration; see also D 741714
1 = 16-pin (12+4-pin) PCB connector
2 = Screw plug: widths A/F 3 and 4; tightening torque: 5 Nm +0.5 Nm
3 = Screw: DIN 6912 – M5x30 – 08.8 – MKL, width A/F 4; tightening torque: 5 Nm +0.5 Nm
4 = Screw: ISO 4762 – M4x10 – 8.8 – MKL, width A/F 3, tightening torque: 2 Nm 0.1 Nm
5 = Functional diameter of taper for ECN/EQN 13xx
6 = Chamfer at start of thread is obligatory for material bonding anti-rotation lock
7 = ExI/resolver flange surface; ensure full-surface contact!
8 = Shaft surface; ensure full-surface contact!
9 =	Mounting clearance between shaft surface and flange surface;compensation of mounting tolerances and thermal expansion
ECI/EQI: dynamic motion permitted over entire range
ECN/EQN: no dynamic motion permitted
10 = M10 back-off thread
11 = Direction of shaft rotation for ascending position values

28

Product Information ECI 1319, EQI 1331  

01/2023

Specifications

ECI 1319 singleturn

EQI 1331 multiturn

Functional safetyfor applications with up toAs a 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 1277016, suitable for safety-related applications
with up to SIL 3 or Category 4, PL e
Safe in the singleturn range

PFH1)

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

Safe position2)

Encoder: ±1.06° (safety-related measuring step SM = 0.35°)
Mechanical coupling: 0° (fault exclusion for the loosening of the shaft coupling and stator coupling;
designed for accelerations at the stator: ≤ 400 m/s2; at the rotor: ≤ 600 m/s2)

Interface

EnDat 3

Ordering designation

E30–R2

Position values per revolution

524 288 (19 bits)

Revolutions–

XEL.time HPFout
data rate≤ 11 µs at 12.5 Mbit/s≤ 8.2 µs at 25 Mbit/s

Propagation time

14 µs (typical)

System accuracy±65”

Electrical connection

16-pin PCB connector (12+4; with separate connection option for external temperature sensor)3)

Cable length

At 12.5 Mbit/s:  100 m; at 25 Mbit/s:  40 m

Supply voltage

DC 4 V to 14 V (recommended: 12 V)

Current consumption (typical)

At 12 V: ≤ 45 mA (without communication)

At 12 V: ≤ 50 mA (without communication)

Power consumption4)(maximum)At 4 V: ≤ 850 mW
At 14 V: ≤ 900 mW

At 4 V: ≤ 950 mW
At 14 V: ≤ 1000 mW

Shaft

Blind hollow shaft for axial clamping ¬ 12.7 mm (44C) or ¬ 12 mm (44A)

Shaft speed 15 000 rpm

 12 000 rpm

Moment of inertia of rotor

2.45 · 10–6 kgm2

2.6 · 10–6 kgm2

Angular acceleration of rotor 1 · 105 rad/s2

4096 (12 bits)

Axial motion of measured shaft  ±0.5 mm
Vibration 55 Hz to 2000 Hz5)
Shock 6 ms

Stator: ≤ 400 m/s ; rotor: ≤ 600 m/s (EN 60068-2-6)≤ 2000 m/s2 (EN 60068-2-27)

22

Operating temperature–40 °C to 115 °C

Trigger threshold for tempera- 130 °C (measuring accuracy of internal temperature sensor: ±1 K)
ture exceedance error message
Relative humidity

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

Protection rating EN 60529

IP20Mass≈ 0.13 kg

ID number

44C shaft: 1286377-01; 44A shaft: 1286377-06

44C shaft: 1286378-01; 44A shaft: 1286378-06

1)

For use at ≤ 2000 m above sea level
Further tolerances may arise in subsequent electronics after position value comparison (contact mfr. of subsequent electronics)
3)
See Temperature measurement in motors in the Encoders for Servo Drives brochure4)
See General electrical information in the Interfaces of HEIDENHAIN Encoders brochure or at www.heidenhain.de5)
10 Hz to 55 Hz, 4.9 mm constant peak to peak2)

Product Information ECI 1319, EQI 1331  

01/20233

Mounting

The blind hollow shaft of the rotary encoder is seated onto the measured shaft andfastened with a central screw. Mounting on the stator side is performed via a centering
diameter with three mounting screws. Use screws with material bonding anti-rotation
lock (see Mounting accessories).

Further information:
For the customer-side mounting design,
the materials specifications for steel
apply to the customer-side shaft, and forthe customer side stator, the materials
specifications for aluminum.
Also pay attention to the other material
properties in the Encoders for Servo
Drives brochure (ID 208922-xx).

4

Product Information ECI 1319, EQI 1331  

01/2023

Mounting accessories
ScrewsScrews (central screw, mounting screws) are not included in delivery.
They can be ordered separately.
1)

ECI 1319/EQI 1331

ScrewsCentral screwfor shaft fastening

DIN 6912-M5×30-08.8-MKL

ID 202264-76

Mounting screw
for flange

ISO 4762-M4×10-8.8-MKL

ID 202264-85 30 or 300

1)

Quantity
10 or 100

With coating for material bonding anti-rotation lock

Please note the information on screws from HEIDENHAIN in the Encoders for Servo Drives
brochure, under Screws with material bonding anti-rotation lock in the chapter Generalmechanical information.
Mounting aid
To avoid damage to the cable, use the mounting aid to connect and disconnect the cable
assembly. Apply pulling force only to the connector of the cable assembly and not to thewires.
ID 1075573-01

EnDat 3 adapter (SA 1210)
Adapter for connecting an encoder with EnDat 3 (E30-R2) to the PWM 21
ID 1317260-01

For further mounting information and mounting aids, refer to the relevant mounting
instructions and the Encoders for Servo Drives brochure. The quality of mounting
can be tested with the PWM 21 and the ATS software. For selecting the software,please contact HEIDENHAIN.

Product Information ECI 1319, EQI 1331  

01/20235

Integrated temperature evaluation

This rotary encoder features 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 the EnDat protocol. Please bearin mind that neither the temperature measurement nor the transmission of the temperature
value is safe in terms of functional safety. With regard to the internal temperature sensor(FID 0x21 SENSOR_TEMP_INT), the rotary encoder supports the two-stage cascaded
signaling of a temperature exceedance. It consists of an EnDat warning and an EnDat error
message. In compliance with the EnDat specification, when the temperature reaches thewarning threshold for temperature exceedance of the internal temperature sensor, anEnDat warning is issued (HPF.STATUS.W "collective warning bit"). In addition, bit 26 (W10)"Temperature warning threshold exceeded" is set in the LPF with the FID=ERRMSG.
This warning threshold for the internal temperature sensor is stored in the parameter
SET.tempWarnLevel and can be individually adjusted. A device-specific default value issaved here before shipping. The temperature measured by the internal temperature sensor
is higher by a device-specific and application-specific amount than the temperature atmeasuring point M1, as shown in the dimension drawing.
The encoder features a further, albeit non-adjustable trigger threshold for the EnDat error
message (HPF.STATUS.F "collective error bit"). In addition, bit 8 (A8) "Permissible ambientconditions exceeded" is set in the LPF with the FID=ERRMSG. This trigger threshold mayvary depending on the encoder model and is stated in the specifications. HEIDENHAIN
recommends adjusting the warning threshold based on the application such that thisthreshold is sufficiently below the trigger threshold for the “Temperature exceeded”
EnDat error message. Compliance with the operating temperature at measuring point M1
is required for adherence to the encoder’s intended and proper use.

6Product Information ECI 1319, EQI 1331  

01/2023

Electrical connection
CablesETFE output cable inside the motor housing  1.8 mm 2 x 0.15 mm2, without shield; AP = 0.15 mm2
12-pin PCB connector (female), with strain relief( 6.2 mm) and 8-pin M23 SpeedTEC
rotatable angle flange socket (male, for communication)

ID 1275042-xx

12-pin PCB connector (female),with strain relief  6.2 mm and2 x ETFE twisted single wires (communication)

ID 1302701-xx

1)

ETFE cable inside the motor 2 x 0.15 mm2 for temperature sensor
4-pin PCB connector (female) with heat shrink tubing
and 2-pin connector (male, for temperature sensor)

ID 1302763-xx

PUR adapter cable  11 mm with external shield (testing cable for the PWM 21);
4 × 1.5 mm2 (power wires)2 × 0.75 mm2 (shielded brake wires)2 × 0.25 mm2 (shielded communication wires); AP = 0.25 mm2
8-pin M23 SpeedTEC straight connector (female) and
3-pin connector (female, for power) and
4-pin connector (male, for brake) and15-pin D-sub connector (male, for communication)

ID 1275291-xx1)

Connecting elements must be suitable for the maximum data rate used.
Please comply with the General electrical information chapter in the Interfaces of HEIDENHAIN encoders brochure.
SpeedTEC is a registered trademark of TE Connectivity Industrial GmbH.

Product Information ECI 1319, EQI 1331  

01/2023

7Electrical connection

Pin layout of ECI, EQI
8-pin M23 SpeedTEC
HMC 2 angle flange socket

16-pin (12+4)
PCB connector

D 3CM234

1222baB
A 1123456

21412Encoder
Power supply / Serial data transfer

Other signals

M23AB//122b5a//4//

1a1b2//21

P_SD+1)

P_SD–

T+T–

VioletYellowBrownGreen1)2)2)MotorBrakeCD1432

Brake +Brake –UVWPEM231)
2)

Power

Supply voltage and data: P_SD+ contains UP (power supply); P_SD– contains 0 V	Connections for external temperature sensor; evaluation optimized for a KTY 84-130, PT 1000, and other sensors(see Temperature measurement in motors in the Encoders for Servo Drives brochure)

Vacant pins or wires must not be used!
SpeedTEC is a registered trademark of TE Connectivity Industrial GmbH.

           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.
Further 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 ConnectorsID 1206103-xx• Brochure: Interfaces of HEIDENHAIN Encoders
ID 1078628-xx• Product Information document: HMC 2ID 1305512-xx• Technical Information document: EnDat 3
ID 1305415-xx• Mounting Instructions: ECI 1319, EQI 1331
ID 1327848• EnDat 3 Application Conditions for Functional Safety
ID 3000003-xx• Supplementary Application Conditions for EnDat 3for Step Monitoring (SIL 3, PLe)
ID 1277016-xx• EnDat Application Notes
ID 722024-xx
For information about EnDat 3, visit www.endat.de.
For brochures and Product Information documents, visit www.heidenhain.de.

1303979 · 00 · C · 02 · 01/2023· PDF