Product Information

KCI 120
KBI 136
Absolute Inductive Rotary
Encoders without Integral
BearingWith additional measures:suitable for safety-related
applications with up to SIL 3
EnDat 2.203/2023

KCI 120, KBI 136
Rotary encoders for absolute position values• Robust inductive scanning principle• Consisting of a scanning unit and a rotor unit

D2d1

  36

≤  29.9≥  40 30.5 

 45.5≤  39.9≥  50 40.5 

  0.08 A


2.8

 0.2 A 

 0.6 C

3x 120°2

D1

  

 0.05 A 3x  0.2 B

TK(3x)

 59.5 3x  0.1 A ± 0.1



d1



 D2  D1






TKZ
3:1







Rotor fastening via three axial countersunk head screws

 2.4 ± 0.1













   M2   Z  0.1 A–0.5
      

Rotor fastening via press-fitted hub

d2

D1

D2D3

 30

≤  25 30h6  48

 42

 

 40

≤  35

 40h6  57 52 Z4:1



d1
 

 9.3
1

 2.25°   



D1d2

D3D2



 0.2 A

 0.05 A
Rzmax 16
k12345678* Instructions for use: use screw with material bonding anti-rotation lock as per DIN 267-27(not included in delivery); see General mechanical information in the Encoders for ServoDrives brochure2Z
 59.3± 0.5

   = Bearing of mating shaft= Required mating dimensions= Measuring point for operating temperature and vibration= 15-pin PCB connector=	Cylinder head screw:
M3x10 DIN EN ISO 4762–8.8–MKL*; ID 202264-87; Md = 1 Nm ±0.06 Nm
3 = Washer: ISO 7089-3-200HV-A2
4 = Ensure space for cable
5 = Direction of shaft rotation for ascending position values
6 =	TK/TKN, separate, with different versions possible; for mounting, see the respective
dimension drawing
7 =	Mounting clearance between circular scale surface and flange surface;compensation of mounting tolerances and thermal expansion;
dynamic motion permitted over entire range(with use of ATS software for mounting inspection, the display value for the mounting
clearance is shown as 1 mm)
8 = Ensure space for electronics; see also the mating dimensions model
9 = Flange surface; ensure full-surface contact!
10 = Chamfer at start of thread is obligatory for material bonding anti-rotation lock


km12




  0.1 B

 d1Z


= Bearing of mating shaft= Required mating dimensions= Scanning unit, separate; different versions possible; for mounting, see the respective dimension drawing=	Countersunk head screw:
M2x6 DIN EN ISO 14581–A2–70; ID 576131-42; 0.25 Nm ±0.015 Nm; protrusion of screw head not permitted=	Mounting clearance between circular scale surface and flange surface of scanning unit; dynamic motion
permitted over entire range (with use of ATS software for mounting inspection, the display value for themounting clearance is shown as 1 mm)= Distance between scanning unit flange surface and circular scale surface= Circular scale surface= Use material bonding anti-rotation lock (at least medium strength)*= On the fine track ( 50.8 mm to  58.8 mm), after being screw-fastened= For press-fitting parameters, see the Mounting Instructions* Instructions for use: use screw with material bonding anti-rotation lock as per DIN 267-27(not included in delivery); see General mechanical information in the Encoders for Servo Drives brochure

Product Information KCI 120, KBI 136    03/2023

Product Information KCI 120, KBI 136    03/2023

3

Specifications

KCI 120 singleturn

KBI 136 multiturn

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 61800-5-3)• Category 3, PL d, in accordance with EN ISO 13849-1:2015
With additional measures as per document 1000344, suitable for safety-related applications with up toSIL 3 or Category 4, PL e
Safe in the singleturn range

Specifications

KCI 120 singleturn

KBI 136 multiturnRotor*

30 mm or 40 mm disk/hub assembly (press-fit version)
36 mm or 45.5 mm bolt circle diameter (screw-fastened version)

Shaft speed 10 000 rpm

Moment of inertia

Disk/hub assembly: 4
 0 mm hollow shaft: 32.2 · 10–6 kgm2;30 mm hollow shaft: 18 · 10–6 kgm2
Circular scale:40 mm hollow shaft: 7 · 10–6 kgm2;
30 mm hollow shaft: 4.43 · 10–6 kgm2
 1 · 105 rad/s2

PFH

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

Safe position1)

Encoder: ±0.88° (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 on the stator:  400 m/s2; on the rotor:  600 m/s2)

Angular acceleration of rotor1)

Interface

EnDat 2.2

Ordering designation

EnDat22

Vibration 55 Hz to 2000 Hz2)
Shock 6 ms

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

Operating temperature

Position values per revolution

1 048 576 (20 bits)–40 °C to 115 °C

Relative humidity

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

Calculation time tcal
Clock frequency≤ 5 µs≤ 16 MHz

Protection rating EN 60529

IP00Mass 0.09 kg (scanning unit + disk/hub assembly)
 0.04 kg (scanning unit + circular scale)

System accuracy±40”

Electrical connection

15-pin PCB connector (with connection for external temperature sensor)

Cable length 100 m (see the EnDat description in the Interfaces of HEIDENHAIN Encoders brochure)Supply voltage

DC 3.6 V to 14 VPower consumption2) (max.)

At 3.6 V: ≤ 650 mW
At 14 V: ≤ 700 mW

Current consumption (typical)

At 5 V: 115 mA

Normal operation at 5 V: 105 mA (without load)
Backup battery: 2
 00 µA (rotating shaft)3)
20 µA (at standstill)

ID number

AE KCI 120 scanning head
1353137-01
Circular scale (screw-fastened version)
1353144-01 (30 mm)
1353142-01 (40 mm)
Disk/hub assembly (press-fitted version)
1353143-01 (30 mm)
1353141-01 (40 mm)

AE KBI 136 scanning head
1353139-01
Circular scale (screw-fastened version)
1353144-01 (30 mm)
1353142-01 (40 mm)
Disk/hub assembly (press-fitted version)
1353143-01 (30 mm)
1353141-01 (40 mm)

65 563 (16 bits)

Axial motion of measured shaft  ±0.5 mm
22* Please select when ordering1)
With multiturn functionality in normal operation; maximum permissible acceleration in backup-battery mode upon request2)
10 Hz to 55 Hz, 4.9 mm constant peak to peak

Rotary encoder UP: DC 3.6 V to 14 V
Backup battery UBat: DC 3.6 V to 5.25 V1)Further tolerances may arise in the downstream electronics after position value comparison (contact mfr.)
See General electrical information in the Interfaces of HEIDENHAIN Encoders brochure, or visit www.heidenhain.com
3)
At T = 25 °C; UBat = 3.6 V2)

4

Product Information KCI 120, KBI 136    03/2023

Product Information KCI 120, KBI 136    03/2023

5InstallationThe KCI 120/KBI 136 is mounted either via
screw-fastening of the circular scale orthrough press-fitting of the disk/hub
assembly, followed by mounting of thescanning unit. The disk/hub assembly isthereby either press-fitted onto the shaft,or the circular scale is screw-fastened to
the given shaft with three screws. The
scanning unit is aligned and mounted via
four holes on the customer’s mounting
surface.

The press-fitting process may be
performed only once for each disk/hub
assembly. For press-fitting, adhere to thematerial properties and conditions for themating surface stated in the relevant
documents for proper use. These
requirements must be followed, evenwhen new disk/hub assemblies are press-

fitted onto customer shafts that havealready been used. The maximum pressing
force must not be exceeded throughout
the press-fitting procedure. Starting at one
millimeter before reaching the final
position, the pressing force must not fall
below the minimum pressing force.

Mounting accessories
ScrewsScrews (fastening screws) are not included in delivery; the M3x10 screws with material
bonding anti-rotation lock can be ordered separately.
KCI 120
KBI 136

ScrewsQuantity

Screw for fastening thescanning unit

ISO 4762-M3×10-8.8-MKL1)

ID 202264-87 10 or 100

Washers for fastening thescanning unit

ISO 7089-3-200HV-A2––Fastening screw forcircular scale

ISO 14581-M2×6-A2-702)––1)	With coating for material bonding anti-rotation lock (for information on use, see theEncoders for Servo Drives brochure)2)	Without anti-rotation lock; use at least a medium-strength material bonding anti-rotationlock

The following material properties andconditions must be complied with forthe customer-side mounting design:

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.
Mating stator

Mating shaft

MaterialAluminum

SteelTensile strength Rm≥ 220 N/mm2≥ 600 N/mm2

Yield strength Rp0.2 or yield point Re–≥ 400 N/mm2

Shear strength τa130 N/mm2≥ 390 N/mm2

Interface pressure PG≥ 250 N/mm2≥ 660 N/mm2

Modulus of elasticity E (at 20 °C)

70 kN/mm2 to 75 kN/mm2

200 kN/mm2 to 215 kN/mm2

Coefficient of thermal expansion therm(at 20 °C)≤ 25 · 10–6

K–1

ID 1075573-01
For more mounting information and mounting aids, see the Mounting Instructions
and the Encoders for Servo Drives brochure. The mounting quality can be inspectedwith the PWM 21 and the ATS software (see Document 1082415).

Screw-fastened version:
10 · 10–6K–1 to 17 · 10–6K–1
Press-fitted version:
10 · 10–6K–1 to 12 · 10–6K–1

Surface roughness RZ≤ 16 µmFriction values

Mounting surfaces must be clean and free of grease.
Use screws and washers from HEIDENHAIN in their condition as delivered.

Tightening procedure

Use a signal-emitting torque wrench in accordance with DIN EN ISO 6789,
with an accuracy of ±6%

Mounting temperature

15 °C to 35 °C

6Product Information KCI 120, KBI 136   

03/2023

Product Information KCI 120, KBI 136   

03/20237

Electrical connection

CablesPin layout for KCI 120
2Output cables inside the motor housing with TPE single wires (8 × 0.16 mm ) and net sleeve without shield

8-pin M12 coupling or flange socket

With 15-pin PCB connector and 8-pin M12 straightflange socket (male) with TPE single wires fortemperature sensor (2 × 0.16 mm2)

ID 1119952-xx

15-pin PCB connector and 8-pin M12 straightflange socket (male)

ID 804201-xx

With 15-pin PCB connector with TPE single wires
2
for temperature sensor (2 × 0.16 mm ) andstripped cable end

ID 1119958-xx

Power supply1)

Output cable inside the motor housing with TPE single wires (8 × 0.16 mm2) and heat shrink tubing without a shield
15-pin PCB connector and stripped cable end

ID 640055-xx1)

1)

Serial data transmission

Other signals

82513476//

131114127891056UPSensor
UP0VSensor
0VDATA

DATA

CLOCK

CLOCK

T+T–Brown/
GreenBlueWhite/
GreenWhite

GrayPink

VioletYellowBrown

GreenCable shield connected with housing; UP = Power supply; T = Temperature
Sensor: The sense line is connected in the encoder with the corresponding power line.
Vacant pins or wires must not be used!

Output cable for HMC 6:  3.7 mm EPG 1 × (4 × 0.06 mm2) + 4 × 0.06 mm2With 15-pin PCB connector and contact insert
for 6-pin HMC 6 hybrid connector (male) with
TPE single wires for temperature sensor(2 × 0.16 mm2), with cable clamp for shieldconnection

15-pin PCB connector

ID 1072652-xx

Pin layout for KBI 136
8-pin M12 flange socket

15-pin PCB connector

Connecting elements must be suitable for the maximum clock frequency used

Power supply

Serial data transmission

Other signals

13111412789105682513476//

UPUBAT

0 V1)

0 VBAT1)

DATA

DATA

CLOCK

CLOCK

T+T–Brown/
GreenBlueWhite/GreenWhite

GrayPink

VioletYellowBrown

Green

UP = Power supply; UBAT = External buffer battery (false polarity can result in damage to the encoder)
Vacant pins or wires must not be used!
1)
Connected inside encoder

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

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

8

Product Information KCI 120, KBI 136   

03/20231397134 · 00 · B · 02 · 03/2023 · 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:
1395973-xx• Operating Instructions: AE KCI 120, KBI 136
1388511-xx• Operating Instructions: TK/TKN KCI 120, KBI 136