Product Information

ROC 425
ROQ 437
Absolute Rotary Encoders
with EnDat 2.2 for SafetyRelated Applications
ID 1322270-xx
ID 1322271-xx
ID 1322275-xx
ID 1322276-xx

06/2022

ROC 425, ROQ 437 with synchro flange
Rotary encoders for absolute position measurement with safe singleturn information• Rotary encoders for separate shaft coupling• 01 C synchro flange• 92A solid shaft with flatSpecifications

ROC 425 singleturn

Functional safety
for applications with up toFor monitoring and closed-loop functions in the singleturn range:• SIL 2 as per EN 61508 (further basis for testing: IEC 61800-5-3)• Category 3, PL d, according to EN ISO 13849-1:20151)

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

Safe position2)

Encoder: ± 1.76° (safety-related measuring step: SM = 0.7°); mechanical coupling: ±0°(fault exclusion for stator coupling and shaft breakage, designed for accelerations ≤ 300 m/s2)

Interface

EnDat 2.2

Ordering designation

EnDat22

Position values per revolution

33 554 432 (25 bits)

Revolutions–Calc. time tcal/ clock freq.

 7 μs /  16 MHz

System accuracy±20”

Electrical connection**

8-pin M12 radial* or axial flange socket (male), or 1 m PUR cable with 8-pin M12 coupling (male)3)

A = Encoder bearing
M1 = Measuring point for operating temperature
M2 = Measuring point for vibration; see also D 741714
1 = M4 – 8.8 screw with material bonding anti-rotation lock; tightening torque: 2.65 Nm ±0.1 Nm; minimum engagement depth: 6 mm
2 = At a permissible interface pressure PG of  280 N/mm2, use a washer
3 = For material properites, see Mounting
4 = Direction of shaft rotation for ascending position values
5 = Connector coding

2

Product Information ROC 425, ROQ 437   06/2022

4096 (12 bits)

Cable length 100 m (at clock frequency ≤ 8 MHz) 20 m (at clock frequency ≤ 16 MHz)

Supply voltage

DC 3.6 V to 14 V

Power consumption4)(maximum) At 3.6 V:  600 mW; at 14 V:  700 mW

At 3.6 V:  700 mW; at 14 V:  800 mW

Current consumption (typical)

5 V: 80 mA (without load)

5 V: 95 mA (without load)

Shaft

92A solid shaft ¬ 6 mm with flat

Shaft speed 15 000 rpmStarting torque (typical)

0.01 Nm (at 20 °C)

Moment of inertia of rotor

2.9 · 10–6 kgm2

Angular acceleration of rotor 1 · 105 rad/s2

Shaft load

Axial:  40 N; radial:  60 N at shaft end

Vibration 55 Hz to 2000 Hz
Shock 6 ms

≤ 300 m/s2 (EN 60068-2-6); 10 Hz to 55 Hz constant over 4.9 mm peak to peak
≤ 2000 m/s2 (EN 60068-2-27)

Min. operating temp.

Flange socket or fixed cable: –40 °C; moving cable: –10 °C5)

Required mating dimensions

ROQ 437 multiturn 12 000 rpm

Max. operating temp.

100 °C

Trigger threshold6) for exceeded
temperature error message

125 °C in the scanning ASIC (measuring accuracy of the internal temperature sensor: ±1 K)

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

Protection EN 60529

Housing: IP67; shaft inlet: IP64 (read about insulation under Electrical safety in the Interfaces ofHEIDENHAIN Encoders brochure; contamination from the ingress of fluids must be avoided)

Mass 0.3 kg

ID number1322270-01* / 1322270-02* This preferred version is available on short notice		1)1322275-01* / 1322275-02** Please select when ordering

For use at  2000 m above sea level ( 6000 m above sea level upon request)
Further tolerances may arise in subsequent electronics after position value comparison (contact mfr. of subsequent electronics)
3)
See the EnDat description in the Interfaces of HEIDENHAIN Encoders brochure4)
See General electrical information in the Interfaces of HEIDENHAIN Encoders brochure5)	For the relationship between operating temperature / shaft speed / supply voltage, see General mechanical information in theRotary Encoders brochure6)The internal temperature evaluation is not designed for functional safety2)

Product Information ROC 425, ROQ 437   06/2022

3

ROC 425, ROQ 437 with clamping flange
Rotary encoders for absolute position measurement with safe singleturn information• Rotary encoders for separate shaft coupling• 03 C clamping flange• 03 D solid shaft with flatSpecifications

ROC 425 singleturn

Functional safety
for applications with up toFor monitoring and closed-loop functions in the singleturn range:• SIL 2 as per EN 61508 (further basis for testing: IEC 61800-5-3)• Category 3, PL d, according to EN ISO 13849-1:20151)

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

Safe position2)

Encoder: ± 1.76° (safety-related measuring step: SM = 0.7°); mechanical coupling: ±0°(fault exclusion for stator coupling and shaft breakage, designed for accelerations ≤ 300 m/s2)

Interface

EnDat 2.2

Ordering designation

EnDat22

Position values per revolution

33 554 432 (25 bits)

Revolutions–Calc. time tcal/ clock freq.

 7 μs /  16 MHz

System accuracy±20”

Electrical connection**

8-pin M12 radial* or axial flange socket (male), or 1 m PUR cable with 8-pin M12 coupling (male)3)

Cable length 100 m (at clock frequency ≤ 8 MHz) 20 m (at clock frequency ≤ 16 MHz)

Supply voltage

DC 3.6 V to 14 V
At 3.6 V:  700 mW; at 14 V:  800 mW

Current consumption (typical)

5 V: 80 mA (without load)

5 V: 95 mA (without load)

Shaft

03 D solid shaft ¬ 10 mm with flat

Shaft speed 15 000 rpm

Starting torque (typical)

0.01 Nm (at 20 °C)

Moment of inertia of rotor

2.9 · 10–6 kgm2

Angular acceleration of rotor 1 · 105 rad/s2

Shaft load

Axial:  40 N; radial:  60 N at shaft end

Vibration 55 Hz to 2000 Hz
Shock 6 ms

≤ 300 m/s2 (EN 60068-2-6); 10 Hz to 55 Hz constant over 4.9 mm peak to peak
≤ 2000 m/s2 (EN 60068-2-27)

Min. operating temp.

Flange socket or fixed cable: –40 °C; moving cable: –10 °C

 12 000 rpm

Max. operating temp.

100 °C

Trigger threshold6) of
temperature exceedance error
message

125 °C in the scanning ASIC (measuring accuracy of the internal temperature sensor: ±1 K)

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

Protection EN 60529

Housing: IP67; shaft inlet: IP64 (read about insulation under Electrical safety in the Interfaces ofHEIDENHAIN Encoders brochure; contamination from the ingress of fluids must be avoided)Mass 0.3 kg

ID number1322271-01* / 1322271-02 / 1322271-03

A = Encoder bearing
M1 = Measuring point for operating temperature
M2 = Measuring point for vibration; see also D 741714
1 = M4 – 8.8 screw with material bonding anti-rotation lock; tightening torque: 2.65 Nm ±0.1 Nm; minimum engagement depth: 6 mm
2 = At a permissible interface pressure PG of  280 N/mm2, use a washer
3 = For material properties, see Mounting
4 =	Direction of shaft rotation for ascending position values
5 = Connector coding* This preferred version is available on short notice		1)

4

Product Information ROC 425, ROQ 437   06/2022

Product Information ROC 425, ROQ 437   06/2022

4096 (12 bits)

Power consumption4) (maximum) At 3.6 V:  600 mW; at 14 V:  700 mW5)

Required mating dimensionsROQ 437 multiturn1322276-01* / 1322276-02** Please select when ordering
For use at  2000 m above sea level ( 6000 m above sea level upon request)
2)
Further tolerances may arise in subsequent electronics after position value comparison (contact mfr. of subsequent electronics)
3)
See the EnDat description in the Interfaces of HEIDENHAIN Encoders brochure4)
See General electrical information in the Interfaces of HEIDENHAIN Encoders brochure5)	For the relationship between operating temperature / shaft speed / supply voltage, see General mechanical information in theRotary Encoders brochure6)
The internal temperature evaluation is not designed for functional safety

5Mounting

Electrical connection

Mounting
The rotary encoders are centered bymeans of the centering collar of thesynchro flange or of the clamping flange
and are secured with screws at their front.
Mechanical fault exclusion can be ensured
only when mounting with three M4 screwsof strength class 8.8 and at a minimum
engagement depth of 6 mm in the rotary
encoder flange. Screws are not included
in delivery. The machine designer isresponsible for specifying a material
bonding anti-rotation lock for the screws
depending on the application.

Pin layout

Fault exclusion was calculated based on amaterial bonding anti-rotation lock with athread friction coefficient of between 0.1
and 0.16. The holes for the screws must be
designed in accordance with EN 20273(medium). The washers must be used formaterials with permissible interfacepressures of ≤ 280 N/mm2.

8-pin M12 couplingPower supply

Rotary encoder with synchro flange

Rotary encoder with clamping flange

Serial data transmission

82513476UP

Sensor UP0V

Sensor 0 VDATADATACLOCK

CLOCKBrown/GreenBlueWhite/GreenWhite

GrayPink

VioletYellow

Cable shield connected to housing; UP = Power supply voltage
Sensor: The sense line is connected in the encoder with the corresponding power line.
Vacant pins or wires must not be used!
Note for safety-related applications: Only completely assembled HEIDENHAIN cables are qualified.
Do not modify cables or exchange their connectors without first consulting with HEIDENHAIN Traunreut!

Further information:
For the customer-side mounting design,
the material specifications for steel applyto the customer-side shaft. For thecustomer-side stator, the material
specifications for aluminum apply.
Note the other material properties in theRotary Encoders brochure (ID349529-xx).

Further information:
For mounting information and mounting
aids, see the mounting instructions inthe Rotary Encoders brochure.

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

6

Product Information ROC 425, ROQ 437   06/2022

1380308 · 00 · A · 02 · 06/2022 · 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:• Operating Instructions				
1379860