Product Information

RCN 2000
RCN 5000
RCN 8000
Absolute Angle Encoders for
Safety-Related Applications

07/2018

RCN 2000 series
Absolute angle encoders for safety-related applications• Safe absolute position• Hollow through shaft ¬ 20 mm• System accuracy of ±2.5” and ±5”

kShaft coupling with ring nut and catch

Shown without ring nut and catch

11

k11

Alternative mounting option
with front-end shaft coupling

A = Bearing of mating shaft
d = Compressed air inlet
k = Required mating dimensions
1 = Mark for 0° position ±5°
2 = Cable support
3 = Free space for customer
4 = Thread engagement: 4.5 ±0.5 mm
5 = Accessory: Ring nut ID 336669-03
6 = Accessory: Catch ID 817921-01
7 = Thread engagement: > 7.5 mm
8 = 2x spring pins ISO 8752 – 2.5x10 – St
9 = Provide additional M3 back-off thread if spring pins are used
10 = Direction of shaft rotation for ascending position values
11 = Tolerance specification includes mounting tolerances and thermal expansion;
no dynamic movement permitted

2Product Information RCN 2000/5000/8000   07/2018

AbsoluteRCN 2510

RCN 2310

Measuring standard

DIADUR circular scale with absolute track and incremental track (16 384 lines)

System accuracy

±2.5”

±5”

Position error per signal period

 ±0.3”

 ±0.4”

Functional safetyfor applications up to• 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

PFH

 25 · 10

Safe position1)

Encoder: ±0.22° (safety-related measuring step SM = 0.088°)
Mechanical connection: Fault exclusions for the loosening of housing/flange andhollow shaft (page 10/11)

Interface

EnDat 2.2

Ordering designation

EnDat22Positions per revolution

268 435 456 (28 bits)

Electrically permissible speed 3000 rpm for continuous position value

Clock frequency
Calculation time tcal

 16 MHz 5 µsElectrical connection

Separate adapter cable connectable to encoder via quick disconnect

Cable length 100 m (with HEIDENHAIN cable; clock frequency:  8 MHz)

Supply voltage

DC 3.6 V to 14 V

Power consumption2) (maximum)

3.6 V:  1.1 W
14 V:  1.3 W

Current consumption (typical)

5 V: 140 mA (without load)

Shaft

Hollow through shaft D = 20 mm

Mechanically permissible speed

 1500 rpm
Temporarily:  3000 rpm3) (consultation required for speeds of over 1500 rpm)

Starting torque (at 20 °C)≤ 0.08 Nm (typical)

Moment of inertia

Rotor (hollow shaft): 180 · 10–6 kgm2
Stator (housing/flange): 670 · 10–6 kgm2

Permissible axial motionof measured shaft±0.3 mm4)Natural frequency

 1000 Hz

Vibration 55 Hz to 2000 Hz
Shock 6 ms

 200 m/s2 (EN 60068-2-6)
 200 m/s2 (EN 60068-2-27)

Operating temperature

0 °C to 50 °C

Protection EN 60529

IP64Mass 1.0 kg–967108 864 (26 bits)

0 °C to 60 °C
3)–20 °C to 60 °C1)	Further tolerances may apply in the subsequent electronics after position value comparison(contact manufacturer of subsequent electronics)
2)
See General electrical information in the Interfaces of HEIDENHAIN Encoders brochure3)
No fault exclusion for the loosening of the mechanical connection
4)
Range includes mounting tolerances and thermal expansion; no dynamic movement permitted

Product Information RCN 2000/5000/8000   07/2018

3RCN 5000 series
Absolute angle encoders for safety-related applications• Safe absolute position• Hollow through shaft ¬ 35 mm• System accuracy of ±2.5” and ±5”

kShaft coupling with ring nut and catch

Shown without ring nut and catch

1111

kAlternative mounting option
with front-end shaft coupling

A = Bearing of mating shaft
d = Compressed air inlet
k = Required mating dimensions
1 = Mark for 0° position ±5°
2 = Cable support
3 = Free space for customer
4 = Thread engagement: 4.5 ±0.5 mm
5 = Accessory: Ring nut ID 336669-17
6 = Accessory: Catch ID 817921-02
7 = Thread engagement: > 7 mm
8 = 2x spring pins ISO 8752 – 2.5x10 – St
9 = Provide additional M3 back-off thread if spring pins are used
10 = Direction of shaft rotation for ascending position values
11 = Tolerance specification includes mounting tolerances and thermal expansion;
no dynamic movement permitted

4

Product Information RCN 2000/5000/8000   07/2018

AbsoluteRCN 5510

RCN 5310

Measuring standard

DIADUR circular scale with absolute track and incremental track (16 384 lines)

System accuracy

±2.5”

±5”

Position error per signal period

 ±0.3”

 ±0.4”

Functional safetyfor applications up to• 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

PFH

 25 · 10–9

Safe position1)

Encoder: ±0.22° (safety-related measuring step SM = 0.088°)
Mechanical connection: Fault exclusions for the loosening of housing/flange and hollow
shaft (page 10/11)

Interface

EnDat 2.2

Ordering designation

EnDat22

Positions per revolution

268 435 456 (28 bits)

Electrically permissible speed 3000 rpm for continuous position value

Clock frequency
Calculation time tcal

 16 MHz 5 µsElectrical connection

Separate adapter cable connectable to encoder via quick disconnect

Cable length 100 m (with HEIDENHAIN cable; clock frequency:  8 MHz)

Supply voltage

DC 3.6 V to 14 VPower consumption2) (maximum)

3.6 V:  1.1 W
14 V:  1.3 W

Current consumption (typical)

5 V: 140 mA (without load)

Shaft

Hollow through shaft D = 35 mm

Mechanically permissible speed

 1500 rpm
Temporarily:  3000 rpm3) (consultation required for speeds of over 1500 rpm)

Starting torque (at 20 °C)≤ 0.2 Nm (typical)

Moment of inertia

Rotor (hollow shaft): 130 · 10–6 kgm2
Stator (housing/flange): 1010 · 10–6 kgm2

Permissible axial motionof measured shaft±0.3 mm4)Natural frequency

 1000 Hz

Vibration 55 Hz to 2000 Hz
Shock 6 ms

 200 m/s2 (EN 60068-2-6)
 200 m/s2 (EN 60068-2-27)

Operating temperature

0 °C to 50 °C

Protection EN 60529

IP64Mass

 0.9 kg

67 108 864 (26 bits)

0 °C to 60 °C
3)–20 °C to 60 °C1)	Further tolerances may apply in subsequent electronics after position value comparison(contact manufacturer of subsequent electronics).
2)
See General electrical information in the Interfaces of HEIDENHAIN Encoders brochure3)
No fault exclusion for the loosening of the mechanical connection
4)
Range includes mounting tolerances and thermal expansion; no dynamic movement permitted

Product Information RCN 2000/5000/8000   07/2018

5RCN 8000 series(3x)Absolute angle encoders for safety-related applications• Safe absolute position• Hollow through shaft ¬ 60 mm• System accuracy of ±1” and ±2”

kShaft coupling with ring nut and catchk

Alternative mounting option with front-end shaft coupling

1212Shown without ring nutand catch

A = Bearingd = Compressed air inlet
k = Required mating dimensions
1 = Mark for 0° position ±5°
2 = Cable support
3 = Free space for customer
4 = Shown rotated by 45°
5 = Thread engagement: 5.5±0.5 mm
6 = Accessory: Ring nut ID 336669-11
7 = Accessory: Catch ID 817921-03
8 = Thread engagement: > 10 mm
9 = 2x spring pins ISO 8752 – 4x10 – St
10 = Provide additional M4 back-off thread if spring pins are used
11 = Direction of shaft rotation for ascending position values
12 = Tolerance specification includes mounting tolerances and thermal expansion; no dynamic movement permitted

6

Product Information RCN 2000/5000/8000   07/2018

Absolute
RCN 8510

RCN 8310

Measuring standard

DIADUR circular scale with absolute track and incremental track (32 768 lines)

System accuracy

±1”

±2”

Position error per signal period

 ±0.15”

 ±0.2”Functional safety
for applications up to• 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 for standstill monitoring and speed monitoring
Category 2, PL d as per EN ISO 13849-1:2015 for safe absolute position(Category 3, PL d as per EN ISO 13849-1:2015 for safe absolute position in conjunction with
HEIDENHAIN controls or Siemens Sinamics S120)

PFH 25 · 10–9

Safe position1)

Encoder: ±0.11° (safety-related measuring step: SM = 0.044°)
Mechanical connection: Fault exclusions for the loosening of housing/flange andhollow shaft (page 10/11)

Interface

EnDat 2.2

Ordering designation

EnDat22

Positions per revolution

536 870 912 (29 bits)

Electrically permissible speed 1500 rpm for continuous position value

Clock frequency
Calculation time tcal

 16 MHz 5 µsElectrical connection

Separate adapter cable connectable to encoder via quick disconnect

Cable length 100 m (with HEIDENHAIN cable; clock frequency:  8 MHz)

Supply voltage

DC 3.6 V to 14 V

Power consumption2) (maximum)

3.6 V:  1.1 W
14 V:  1.3 W

Current consumption (typical)

5 V: 140 mA (without load)

Shaft

Hollow through shaft D = 60 mm

Mechanically permissible speed 500 rpm
Temporarily:  1500 rpm3) (consultation required for speeds of over 500 rpm)

Starting torque (at 20 °C)≤ 0.7 Nm (typical)

Moment of inertia

Rotor (hollow shaft): 1.22 · 10–3 kgm2
Stator (housing/flange): 11.0 · 10–3 kgm2

Permissible axial motionof measured shaft±0.3 mm4)Natural frequency

 900 Hz

Vibration 55 Hz to 2000 Hz
Shock 6 ms

 200 m/s2 (EN 60068-2-6)
 200 m/s2 (EN 60068-2-27)

Operating temperature

0 °C to 50 °C

Protection EN 60529

IP64Mass

 2.8 kg1)

 urther tolerances may apply in the subsequent electronics after position value comparisonF(contact manufacturer of subsequent electronics).
2)
See General electrical information in the Interfaces of HEIDENHAIN Encoders brochure3)
No fault exclusion for the loosening of the mechanical connection4)	Range includes mounting tolerances and thermal expansion; no dynamic movement permitted
Sinamics is a registered trademark of Siemens AG
Product Information RCN 2000/5000/8000   07/2018

7RCN 8000 series
Absolute angle encoders for safety-related applications• Safe absolute position• Hollow through shaft ¬ 100 mm• System accuracy of ±1” and ±2”

kShaft coupling with ring nut and catchkAlternative mounting option with front-end shaft coupling

1212Shown without ring nutand catch

A = Bearingd = Compressed air inlet
k = Required mating dimensions
1 = Mark for 0° position ±5°
2 = Cable support
3 = Free space for customer
4 = Thread engagement: 5.5±0.5 mm
5 = Shown rotated by 45°
6 = Accessory: Ring nut ID 336669-16
7 = Accessory: Catch ID 817921-04
8 = Thread engagement: > 10 mm
9 = 2x spring pins ISO 8752 – 4x10 – St
10 = Provide additional M4 back-off thread if spring pins are used
11 = Direction of shaft rotation for ascending position values12 = Tolerance specification includes mounting tolerances and thermal expansion; no dynamic movement permitted.

8Product Information RCN 2000/5000/8000   07/2018

AbsoluteRCN 8510

RCN 8310

Measuring standard

DIADUR circular scale with absolute track and incremental track (32 768 lines)

System accuracy

±1”

±2”

Position error per signal period

 ±0.15”

 ±0.2”Functional safety
for applications up to• 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 for standstill monitoring and speed monitoring
Category 2, PL d as per EN ISO 13849-1:2015 for safe absolute position(Category 3, PL d as per EN ISO 13849-1:2015 for safe absolute position in conjunction withHEIDENHAIN controls or Siemens Sinamics S120)

PFH 25 · 10–9

Safe position1)

Encoder: ±0.11° (safety-related measuring step SM = 0.044°)
Mechanical connection: Fault exclusions for the loosening of housing/flange andhollow shaft (page 10/11)

Interface

EnDat 2.2

Ordering designation

EnDat22

Positions per revolution

536 870 912 (29 bits)

Electrically permissible speed 1500 rpm for continuous position value

Clock frequency
Calculation time tcal

 16 MHz 5 µsElectrical connection

Separate adapter cable connectable to encoder via quick disconnect

Cable length 100 m (with HEIDENHAIN cable; clock frequency:  8 MHz)

Supply voltage

DC 3.6 V to 14 V

Power consumption2) (maximum)

3.6 V:  1.1 W
14 V:  1.3 W

Current consumption (typical)

5 V: 140 mA (without load))

Shaft

Hollow through shaft D = 100 mm

Mechanically permissible speed 500 rpm
Temporarily:  1500 rpm3) (consultation required for speeds of over 500 rpm)Starting torque (at 20 °C)≤ 1.0 Nm (typical)

Moment of inertia

Rotor (hollow shaft): 3.20 · 10–3 kgm2
Stator (housing/flange): 10.0 · 10–3 kgm2

Permissible axial motionof measured shaft±0.3 mm4)Natural frequency

 900 Hz

Vibration 55 Hz to 2000 Hz
Shock 6 ms

 200 m/s2 (EN 60068-2-6)
 200 m/s2 (EN 60068-2-27)

Operating temperature

0 °C to 50 °C

Protection EN 60529

IP64Mass

 2.6 kg1)

 urther tolerances may apply in the subsequent electronics after position value comparisonF(contact manufacturer of subsequent electronics).
2)
See General electrical information in the Interfaces of HEIDENHAIN Encoders brochure3)
No fault exclusion for the loosening of the mechanical connection4)	Range includes mounting tolerances and thermal expansion; no dynamic movement permitted
Sinamics is a registered trademark of Siemens AG
Product Information RCN 2000/5000/8000   07/2018

9Functional safety

With its RCN 2000/5000/8000 series ofabsolute angle encoders, HEIDENHAIN offers
the ideal solution for position acquisition for
rotary axes in safety-related applications.
In conjunction with a safe control, theencoders can be used as single-encoder
systems in applications with control category
SIL 2 (as per EN 61508) or performancelevel d (as per EN ISO 13849).
Reliable transmission of the position is basedon two independently generated absolute
position values and on error bits that areprovided to the safe control. The functionsof the encoder can be used for numerous
safety functions in the complete system as
per EN 61800-5-2 (see table).

In addition to the data interface, themechanical connection of the encoder to themotor is also relevant to safety. Table D16of the EN 61800-5-2 standard for electrical
drives includes the loosening of themechanical connection between theencoder and drive as a fault that requiresconsideration. Since the control is notnecessarily able to detect such errors, fault
exclusion for the loosening of the mechanicalconnection is required in many cases.

Electrical connection
Mechanical connection
Safe encoder

Safe control

The RCN 2000/5000/8000 angle encoders
provide a safe absolute position value at all
times—including immediately upon switch-on.
Purely serial data transfer takes place via
the bidirectional EnDat 2.2 interface.
Safety-related position
measuring system

Safety-related position measuring system with mechanical connection and electrical interface

Fault exclusion for the loosening of themechanical connection
There are various ways of connecting theRCN 2000, RCN 5000, and RCN 8000 series
for providing this kind of fault exclusion.
Whereas the housing or flange is standardly
mounted with fastening screws, special
factors must be taken into consideration
for the hollow-shaft connection. For more
information on this topic and on limitations
to the specifications, please refer to thefollowing table.

Fault exclusion is thereby possible for theloosening of the mechanical connection
between the encoder and the machine shaft
or customer-side fastening components.
For the design of the mechanical fault
exclusion for other purely customer-sideconnections, the following torque of theencoder must be taken into account:
MMax = J · Þ + MFriction

1)

J:	Moment of inertia of the encoder (rotoror stator; see the specifications) and of
the mechanical connection (e.g., ring nutand catch when acceleration is applied
over the hollow shaft and shaft coupling
via the given components)
Þ:	Max. angular acceleration in the application
MFriction: RCN 2000:
RCN 5000:
RCN 8000 ( 60 mm):
RCN 8000 ( 100 mm):

4.5 Nm
4.5 Nm
7.5 Nm
8.5 NmMechanicalconnection

Fastening

Safe position for themechanical coupling2)

Restricted
specifications3)

Housing/flange

RCN 2000/5000: ISO 4762 8.8 M4 screws
RCN 8000:
ISO 4762 8.8 M5 screws±0°

Hollow shaft
Shaft couplingwith ring nut

Ring nut and catch (see Mounting)See the specifications:• Mechanicallypermissible speed• Operating temperature(only for RCN 2000/5000)

Hollow shaft
Front-end
shaft coupling

RCN 2000/5000:	ISO 4762 8.8 M3 screws
ISO 8752 – 2.5x10 – St spring pins
RCN 8000:	ISO 4762 8.8 M4 screws
ISO 8752 – 4x10 – St spring pins

RCN 2000: ±0.55°
RCN 5000: ±0.35°
RCN 8000:  60 mm: ±0.15°
 100 mm: ±0.10° See Mounting:• Usable materials
RCN 2000: ±0.07°• Permissible angular
RCN 5000: ±0.06°
acceleration
RCN 8000: ±0.02°1)

A suitable anti-rotation lock must be used for the screw connections (in the case of mounting/servicing)
Fault exclusions are given only for the explicitly mentioned mounting options
3)
Compared with standard encoders (see the Angle Encoders with Integral Bearing brochure)
Product Information RCN 2000/5000/8000   07/2018102)

Mounting

Mounting
For the RCN angle encoders, the shaft
connection is implemented with a ring nutand catch.

Alternatively, a front-end shaft couplingwith mounting screws and spring pins isalso possible.

Catch for RCN 2000:
ID 817921-01
Catch for RCN 5000:
ID 817921-02
Catch for RCN 8000:– Hollow shaft  60 mm:  ID 817921-03– Hollow shaft  100 mm:  ID 817921-04

3.
2.
Catch2xISO 8752 – 2.5x10 – St

1.
4x

Ring nut

Shaft coupling with ring nut and catch

Front-end shaft coupling with mounting screws and spring pins

D (mm)

Moment of inertia ofring nut and catch

29.6

4.8 · 10kgm2

RCN 500045.8–624 · 10kgm2

RCN 8000 (¬ 60 mm)

70

87 · 10–6 kgm2

RCN 8000 (¬ 100 mm)

114

550 · 10–6 kgm2

RCN 2000–6CatchProduct Information RCN 2000/5000/8000   07/2018

11Materials to be used
The materials stated in this table must beused for the machine shaft and fastening
components.

Mating shaft

Mating stator

Material

Ferrous materials (steel/cast iron materials)

Tensile strength Rm

 600 N/mm2

 250 N/mm2

Shear strength τB 390 N/mm2

 290 N/mm2

Interface pressure pG

 660 N/mm2

 275 N/mm2

Elastic modulus E

110 000 N/mm to 215 000 N/mm22

Coefficient of expansion 10 · 10–6 K–1 toÞtherm (at 20 °C)
17 · 10–6 K–1
Mounting temperature

Permissible angular acceleration
Based on where acceleration is applied andthe mounting type, the following values
apply to the angular acceleration:• Permissible angular acceleration of therotor when acceleration is applied via thehollow shaft and shaft coupling with ringnut and catch:
RCN 2000 series: 20 000 rad/s2
RCN 5000 series: 25 000 rad/s2
RCN 8000 series:–  60 mm: 4500 rad/s2–  100 mm: 3500 rad/s2• Permissible angular acceleration of therotor when acceleration is applied via thehollow shaft and a front-end shaft
coupling with fastening screws andspring pins:
RCN 2000 series: 5500 rad/s2
RCN 5000 series: 10 000 rad/s2
RCN 8000 series:–  60 mm: 3000 rad/s2–  100 mm: 3000 rad/s2

12All of the specifications on screw connections are based ona mounting temperature of 15 °C to 35 °C• Permissible angular acceleration of thestator when acceleration is applied via
the flange/housing:
2RCN 2000 series: 4000 rad/s
RCN 5000 series: 2500 rad/s2
RCN 8000 series:–  60 mm: 1000 rad/s2–  100 mm: 1000 rad/s2

Product Information RCN 2000/5000/8000   07/2018

Electrical connection

Cables222

 4.5 mm; 1 × (4 × 0.09 mm ) + 4 x 0.16 mm ; AP = 2 x 0.16 mm

PUR adapter cables
With 8-pin M12 coupling (male)

729681-xx

With 15-pin D-sub connector (female)

1119394-xx

2)
22 6 mm; 2 × (2 x 0.09 mm + 2 × (2 x 0.16 mm ); AP = 2 x 0.16 mm

Adapter cables and connecting cable
Connecting cable with 8-pin M12 connector(female) and 8-pin M12 coupling (male)1036372-xx

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

1036521-xx

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

1036526-xx

AP: Cross section of power supply lines¬: Cable diameter (for bend radii, see the Interfaces of HEIDENHAIN Encoders brochure)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.
For more cables, see the Angle Encoders with Integral Bearing brochure.

Pin layout
8-pin M12 coupling

15-pin D-sub connector

Voltage supply

Absolute position values

8251

347

6192

11581415UP

Sensor UP0VSensor 0 VDATADATACLOCKCLOCKBrown/GreenBlueWhite/GreenWhiteGrayPink

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!

Product Information RCN 2000/5000/8000   07/201813       
   
 

1079323 · 04 · A · 02 · 07/2018 · 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 made.

More information:
Comply with the requirements described in the following documents to ensure thecorrect operation of the encoder:• Brochure: Angle Encoders with Integral Bearing
591109-xx• Brochure: Interfaces of HEIDENHAIN Encoders
1078628-xx• Mounting instructions: RCN 2310/2510
765742-xx
RCN 5310/5510
765743-xx
RCN 8310/8510 ( 60 mm)
765744-xx
RCN 8310/8510 ( 100 mm)
765745-xx• Safety-Related Position Measuring Systems Technical Information
596632-xx
14
For implementation in a control:• Specification for safe control
533095-xx
For brochures and product information sheets, visit www.heidenhain.de.