Product Information

ECN 424 S
EQN 436 S
Absolute Rotary Encoders
with DRIVE-CLiQ Interface for
Safety-Related Applications
Firmware 5302/2022

ECN 424 S, EQN 436 S
Rotary encoders for absolute position measurement with safe singleturn information• Blind hollow shaft with steel clamping ring:¬ 12 mm (68S)¬ 10 mm (68T)

Required mating dimensions

Specifications

ECN 424 S

EQN 436 S

Functional safety
for applications with up toAs a single-encoder system for monitoring functions and control-loop functions:• SIL 2 as per EN 61508 (further basis for testing: IEC 61800-5-2)• Category 3, PL d as per EN ISO 13849-1:2015
Safe in the singleturn rangePFH1)

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

Safe position2)

Encoder: ±1.76° (safety-related measuring step: SM = 0.7°)
Mechanical coupling: ±2° (fault exclusion for loosening of the shaft and stator coupling,
designed for accelerations of  150 m/s2)

Interface/ordering designation

DRIVE-CLiQ / DQ01

Firmware01.32.26.53

SINAMICS SIMOTION3) V4.4 HF4SINUMERIK with Safety3)

 V4.4 SP2

SINUMERIK without safety3)

 V4.4 SP1 HF3Position values per revolution

16 777 216 (24 bits)

Revolutions–Calc. time TIME_MAX_ACTVAL6) 8 µsSystem accuracy (at 20 °C)±20”Electrical connection4)8-pin M12 radial flange socket or 1 m cable (EPG) with 8-pin M12 coupling5)

Supply voltage

DC 24 V (10 V to 28.8 V)(up to DC 36.0 V possible without impairment of functional safety)

Power consumption (max.)

At 10 V: 950 mW
At 28.8 V:  1000 mW

At 10 V:
 1050 mW
At 28.8 V:  1150 mW

Current consumption (typical)

At 24 V: 38 mA (without load)

At 24 V: 43 mA (without load)

Cable length 40 m5)4096 (12 bits)

Bold: This preferred version is available on short notice.
1)
For use at  1000 m above sea level ( 6000 m above sea level upon request)2)	Further tolerances may arise in the downstream electronics after position value comparison (contact manufacturer)3)	See Siemens document “Certified encoders with DRIVE-CLiQ Dependencies on SIMOTION / SINUMERIK and SINAMICS Hardware
and Software versions”4)	Cable outlet with cable length > 0.5 m requires strain relief for the cable;flange socket versions may be used only with plastic-coated M12 mating connector
5)
See also the Cables and Connectors brochure, as well as the Interfaces of HEIDENHAIN Encoders brochure6)	The calculation time TIME_MAX_ACTVAL specifies the earliest time (relative to the request time) after which the transfer of data fromthe encoder to the control can begin (data such as position or diagnostic data)
DRIVE-CLiQ is a registered trademark of Siemens AG
A = Bearing of mating shaft
M1 = Measuring point for operating temperature
M2 = Measuring point for vibration
1 = Connector coding
2 = X8 clamping screw with hexalobular socket; tightening torque: 1 Nm ±0.06 Nm
3 = Compensation of mounting tolerances and thermal expansion; no dynamic motion permitted
4 = Protection against contact as per EN 60529
5 = Chamfer at start of thread is obligatory for material bonding anti-rotation lock;screw: ISO 4762 – M3x8– 8.8–MKL; tightening torque: 1 Nm ±0.06 Nm
6 = Direction of shaft rotation for ascending position values

2Product Information ECN 424 S/EQN 436 S   02/2022

Product Information ECN 424 S/EQN 436 S   02/2022

3

MountingSpecifications

ECN 424 S

EQN 436 S

Shaft*

Blind hollow shaft ¬ 12 mm / ¬ 10 mmSpeed1)

 6000 rpm

Starting torque (at 20 °C)

 0.01 Nm

Moment of inertia of rotor 6 · 10–6 kgm2

Angular acceleration of rotor 4 · 104 rad/s2

Axial motion of the measured shaft

 ±1 mm

Vibration 55 Hz to 2000 Hz2)
Shock 6 ms2
 150 m/s (EN 60068-2-6)
 1000 m/s2 (EN 60068-2-27)

Operating temperature3)–30 °C to 100 °C

Trigger threshold of error message4)
for excessive temperature

117 °C in the scanning ASIC (measuring accuracy of the internal temperature sensor:±2 K at 117 °C)

Relative humidity

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

Protection rating EN 60529

IP67 for housing; IP64 at shaft inlet(read about insulation under Electrical safety in the Interfaces of HEIDENHAIN Encoders
brochure; contamination from the ingress of fluids must be avoided)Mass 0.3 kg

ID number

1179146-07
1179146-08
1179146-09
1179146-11

Mounting
The rotary encoder’s hollow shaft is pressed
onto the measured shaft and clamped on
its rotor side via a screw (tightening torque:
1 Nm ±0.06 Nm). The stator is connected
to a flat surface without a centering collar.
For the hollow-shaft connections 68S and68T, repeated fastening reduces the screw
retaining force. In order to maintain therequired safety factor for friction-locked
connections, the maximum permissible
number of fastening procedures is limited
to four. Beyond this number of repetitions,mechanical fault exclusion cannot beguaranteed. In these cases, new clamping
rings must be ordered separately.
Clamping ring for 10 mm
ID 540741-06
Clamping ring for 12 mm
ID 540741-07
To fasten the stator coupling, use fourscrews (ISO 4762 – M3 – 8.8 – MKL) witha material bonding anti-rotation lock as per
DIN 267-27 and one flat washer each as
per ISO 7092. Minimum engagement of6 mm. Note the curing time for the material
bonding anti-rotation lock!

1179147-08
1179147-09
1179147-10
1179147-11

Bold: This preferred version is available on short notice* Please select when ordering1)
At  2 position requests per revolution2)
10 Hz to 55 Hz constant over 4.9 mm peak to peak3)	For information on operating temperature, shaft speed and supply voltage, see General mechanical information in the Rotary Encoders
brochure4)
The internal temperature evaluation is not designed for functional safety

With standard stator coupling
Blind hollow shaft

Further information:
For the customer-side mounting design,
the material specifications for steel apply
to the customer-side shaft, and thespecifications for aluminum apply to thecustomer-side stator.

The firmware version can be read out overthe DRIVE-CLiQ parameter “Act_FW_Version”(index 0). The final two digits of the displayed
value are decisive.

In addition, take into account the material
properties, mounting information andmounting aids in the mounting instructions
and in the Rotary Encoders brochure.

4Product Information ECN 424 S/EQN 436 S   02/2022

Product Information ECN 424 S/EQN 436 S   02/2022

With EnDat 2.2 encoders, valuation numbers
can be read cyclically from the encoder toevaluate its functioning. The valuation
numbers provide the current state of theencoder and ascertain the encoder’s“function reserves.” These function reserves
are also transmitted via the DRIVE-CLiQ
interface and can be displayed in thehigher-level control. Further information isavailable from HEIDENHAIN upon request.

5Integrated temperature evaluation

These rotary encoders feature an internal
temperature sensor integrated into the­encoder electronics. The digitized temperature value is transmitted purely serially via theDRIVE-CLiQ interface. Please bear in mind
that neither the temperature measurement
nor the transmission of the temperature
value is safe in terms of functional safety.
The temperature measured by the internal
temperature sensor is higher by a devicespecific and application-specific amountthan the temperature at measuring point
M1, as shown in the dimension drawing.

Electrical connection

Upon reaching a trigger threshold for theinternal temperature sensor, these rotary
encoders issue an “Alarm 405” error­message. This threshold may vary depending on the encoder and is stated in thespecifications. During operation, it is­recommended that the temperature bekept adequately below the error-message
threshold.

Pin layout
8-pin M12 flange socket or 8-pin M12 couplingPower supply

Serial data transmission
Transmit dataThe encoder’s intended use requires
compliance with the operating temperature
at measuring point M1.

Receive data

15763428UP0V

TXP

TXN

RXPRXN//WhiteWhite/Green

VioletYellow

GrayPinkBlueBrown/Green

Cable shield connected to housing; UP = Power supply voltage
Unused pins must not be assigned!

More information:
For connecting cables and adapter
cables, see the Cables and Connectors
brochure.

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

6

Product Information ECN 424 S/EQN 436 S   02/2022

1233742 · 01 · A · 02 · 02/2022 · 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: Rotary Encoders							 349529-xx• Brochure: Interfaces of HEIDENHAIN Encoders			1078628-xx• Brochure: Cables and Connectors						1206103-xx• Mounting Instructions: ECN 424 S / EQN 436 S			1163012-xx