Product Information

KCI 120 Dplus
Absolute Inductive Rotary
Encoder with Additional
Functionality:
Position measurementof output side

12/2021

General information

KCI 120 Dplus

Absolute inductive rotary encoder with additional functionality• Robust inductive scanning principle• Consisting of an AE scanning unit and two rotor units (circular scale)• Position measurement of output side

6250±0.05

 36A



A-A
5:1

1090°... 120°
 3.3±0.1

 0.08 A
gratfrei

M35504x  0.2 AASpecifications

KCI 120 Dplus

Interface

EnDat 2.2

Ordering designation

EnDat22Calculation time tcal
Clock frequency

 5 µs 16 MHzElectrical connection

15-pin PCB connector (radial); cable length  10 m

Supply voltage

DC 3.6 V to 14 V (for both axes together)

Power consumption (max.)2)

At 3.6 V:  1.2 W
At 14 V:  1.4 W

Current consumption (typical)

At 5 V: 180 mA (without load)

Vibration 55 Hz to 2000 Hz3)
Shock 6 ms

AE scanning unit:  400 m/s
 2000 m/s2 (EN 60068-2-27)

Operating temperature–40 °C to 115 °C

Relative humidity

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

Protection rating EN 60529

IP00 (read about insulation under Electrical safety in the Interfaces of HEIDENHAIN Encoders brochure)Mass 0.03 kg (scanning unit and rotors)

ID number

Individual packaging:
ID 1334444-01 (AE scanning unit)
ID 1334113-01 (circular scale: Encoder A)
ID 1332066-01 (circular scale: Encoder B)

 = Bearing of mating shaft
 = Required mating dimensions
M = Measuring point for operating temperature and vibration
1 = 15-pin PCB connector
2 = Shown with customer side
3 = Max. permissible hole diameter for non-isolated electrically conductive parts;
avoid passage of segmented shafts through the hole
4 = Encoder B mating dimension (motor side);
tolerance includes compensation of mounting tolerances and thermal expansion;
dynamic motion permitted over entire tolerance range
5 = Encoder A mating dimension (output side);
tolerance includes compensation of mounting tolerances and thermal expansion;
dynamic motion permitted over entire tolerance range
6 = ISO 4762 or ISO 14583 – M3x8 – 8.8 – MKL* (4x)with DIN 6796 – 3 – FSt (4x) spring washer and DIN 7349 – 3.2 – A2 (4x) washer;tightening torque: 1 Nm ±0.1 Nm;
ensure proper orientation of the spring washer: convex side must face the screw head
7 = Direction of rotation of both shafts for ascending position values
8 = Ensure installation space for cable
9 = Ensure space for electronics; see also the mating dimension model
10 = Chamfer at start of thread is obligatory for materially bonding anti-rotation lock
11 = Holes for aligning the scanning unit via a device or to the motor-side geometry;centered position relative to reference  after assembly:
12 = Graduation side of circular scale
13 = Mounting side of circular scale
14 = On the fine track (Ø 31.0 mm to Ø 38.5 mm), after mounting
15 = On the fine track (Ø 48.0 mm to Ø 57.0 mm), after mounting
16 = Centering circle of circular scale after mounting:17 = Centering circle of circular scale after mounting:2

Collective package:
ID 1334444-51 (AE scanning unit)
ID 1334113-51 (circular scale: Encoder A)
ID 1332066-51 (circular scale: Encoder B)

See pin layout for encoder
See General electrical information in the Interfaces of HEIDENHAIN Encoders brochure, or visit www.heidenhain.com3)
Scanning unit: 10 Hz to 55 Hz, 6.5 mm constant peak to peak
Rotors: 10 Hz to 55 Hz, 10 mm constant peak to peak

132)

1214
 0.2 A 1.5±0.15

Position measurement

17
 38

13
1215
 0.2 A 1.5±0.15*For instructions regarding screws with material bonding anti-rotation lock as per DIN 267-27,
see General mechanical information in the Rotary Encoders brochure (these screws not included!)Specifications

KCI 120 Dplus singleturn
Output side (Encoder A)

KCI 120 Dplus singleturn
Motor side (Encoder B)

Shaft speed 6000 rpm

 15 000 rpm

Moment of inertia of circularscale

3.7 · 10–6 kgm2

0.8 · 10–6 kgm2

Axial motion1)±0.3 mm±0.5 mm

Position values per revolution

1 048 576 (20 bits)

524 288 (19 bits)

System accuracy2)±40”±120”

1)
2)

21)

1)

16
 22.5

 20±0.2

4.2

 39.5±0.2

AZ

2.5±0.24x  0.2 A
 9±0.2

1
9

 18



1±0.3

50



Z2:1



 22±0.2

81





1±0.5



 58±0.257°

 20±0.231050.
5± ) (4x 74
4xCZ  0.1
 2±0.05


50±0.0529.5±0.3



11

6.4

34.5

57°

Product Information KCI 120 Dplus  12/2021

Including thermal linear expansion and mounting tolerance
At the stated radial runout of the circular scale

Product Information KCI 120 Dplus  12/2021

3

Mounting
Mounting and protection rating

Electrical resistance

Mounting and protection rating
Mounting of the KCI 120 Dplus is performed
through the mounting of two circular scales
that are fastened, for example, to therelevant shafts with plane surfaces or tothe customer-side hub mounted to theshaft. The scanning unit is mounted to thecustomer-side mounting surface via fourholes.

Check the electrical resistance between
the customer-side stator and bothcustomer-side shafts. Nominal value: < 1 ohm

Circular scale (Encoder B)

Scanning unit

More information:
To ensure proper operation, comply withthe measures in the General electricalinformation under Electromagnetic
compatibility in the Interfaces of
HEIDENHAIN encoders brochure.

Scanning unit (mounted)

Circular scale (Encoder A)

Mounting tool
To avoid damage to the cable, use themounting aid to disconnect the cableassembly. Apply pulling force only to theconnector of the cable assembly and notto the wires.
ID 1075573-01
Mounting accessories
M3 ISO 4762 – 8.8 MKL screws andDIN 6796 - 3 - FSt. spring washers
Washers: 3.2 DIN 7349 - A2
Instructions for use: use screws withmaterial bonding anti-rotation lock as per
DIN 267 27 (see General mechanicalinformation in the Rotary Encoders brochure).
Fastening screws, spring washers, andwashers are not included in delivery.

4For more mounting information andmounting aids, see the Mounting
Instructions and the Encoders forServo Drives brochure. The mounting
quality can be checked with the PWM 21and the ATS software(see document ID 1082415).

Product Information KCI 120 Dplus  12/2021

Product Information KCI 120 Dplus  12/2021

5

Testing and inspection devices, and diagnostics

HEIDENHAIN encoders provide all of theinformation needed for initial setup,monitoring, and diagnostics. The type ofinformation available depends on whether
the encoder is incremental or absoluteand on which interface is being used.
Absolute encoders employ serial datatransmission. The signals are extensively
monitored within the encoder. Themonitoring results (particularly valuationnumbers) can be transmitted to thesubsequent electronics along with theposition values via the serial interface(digital diagnostics interface). The
following information is available:• Error message: position value is notreliable• Warning: an internal functional limit of
the encoder has been reached• Valuation numbers:– Detailed information about theencoder’s function reserve– Identical scaling for all HEIDENHAIN
encoders– Cyclic reading capability

The downstream electronics are able toevaluate the current status of the encoderwith low resource expenditure, including
in closed-loop operation.
For the analysis of these encoders,
HEIDENHAIN offers the appropriate PWM
inspection devices and PWT testing
devices. Based on how these devices areintegrated, a distinction is made between
two types of diagnostics:• Encoder diagnostics: the encoder isconnected directly to the inspection or
testing device, thereby enabling adetailed analysis of encoder functions.

• Monitoring mode: the PWM inspection
device is inserted within the closed
control loop (via suitable testing adapters
as needed). This enables real-time
diagnosis of the machine or equipment
during operation. The available functions
depend on the interface.

Electrical connection

For connection to the PWM 21 diagnostic
and testing device, Encoder A (output side)and Encoder B (motor side) each require adifferent special testing cable.

HEIDENHAIN offers two testing cables forthis purpose. As a result, either a testing
cable for the output-side encoder or a testing
cable for the motor-side encoder can beconnected to the PWM 21 as needed.

Pin layout of the testing cables
Testing cable for connection to Encoder A: 1311046-xx
15-pin PCB connector
15Power supply

15

Serial data transmission(Encoder A)

14121311789100V

Sensor
0VUPSensor
UPDATAADATAACLOCKA

CLOCKAWhite/GreenWhite

Brown/GreenBlue

Gray

Pink

VioletYellow

UP = Power supply
Vacant pins or wires must not be used!

Mounting accuracy with the PWM 21 and the ATS software

Testing cable for connection to Encoder B: 1311047-xx
15-pin PCB connector
15PWM 21The PWM 21 phase-angle measuring unit,
in conjunction with the included ATSadjusting and testing software, serves as
an adjusting and testing package for thediagnosis and adjustment of HEIDENHAIN
encoders.

For more information, see the PWM 21/
ATS Software Product Information
document.

6

Power supply

Serial data transmission(Encoder B)

PWM 21
Encoder input• EnDat 2.1, EnDat 2.2, or EnDat 3 (absolute valuewith or without incremental signals)• DRIVE-CLiQ• Fanuc Serial Interface• Mitsubishi high speed interface• Yaskawa Serial Interface• Panasonic serial interface• SSI• 1 VPP/TTL/11 µAPP
• HTL (via signal adapter)

InterfaceUSB 2.0

Supply voltage

AC 100 V to 240 V or DC 24 VDimensions

258 mm × 154 mm × 55 mm

151412131112340V

Sensor
0VUPSensor
UPDATA
B

DATA
B

CLOCK
B

CLOCK
B

White/GreenWhite

Brown/GreenBlue

GrayPink

VioletYellow

UP = Power supply
Vacant pins or wires must not be used!

DRIVE-CLiQ is a registered trademark of Siemens AG.

Product Information KCI 120 Dplus  12/2021

Product Information KCI 120 Dplus  12/2021

7

Pin layout for the rotary encoder
15-pin PCB connector
15

Serial data transmission(Encoder A)

Power supply

Serial data transmission(Encoder B)

141213117891012340VSensor
0VUPSensor
UPDATAADATAACLOCKA

CLOCKA

DATA
BDATA
B

CLOCKB

CLOCKBUP = Power supply
Vacant pins or wires must not be used!
The subsequent electronics must have a common ground reference!

Cable length > 0.5 m:
To prevent crosstalk, the two EnDat inter­faces must be separately shielded fromeach other. The cable sold by the meter, withID 1347450-xx (PUR,  3.7 mm), can beused for this. Two cables must be attachedto the PCB connector in order to transmit
the EnDat signals separately. Only one cableis used for the power supply.
When using the cable sold by the meterwith ID 1347450-xx, comply with theGeneral information in the Cables andConnectors brochure; use of the cables attemperatures of up to 100 °C is possible,
provided that the exposure to hydrolysis
and harmful media is low.

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1357659 · 00 · A · 02 · 12/2021 · PDF

Cable length ≤ 0.5 m:
When single wires up to a maximum lengthof 0.5 m are used, each data and clock wirecombination must be implemented as atwisted wire pair in order to avoid coupledinterference. As an alternative, the cablewith ID 605090-51 (EPG,  4.5 mm) and alength of 0.3 m can be used. The General
information in the Cables and Connectors
brochure must be noted.

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		208922-xx• Brochure: Interfaces of HEIDENHAIN Encoders		1078628-xx• Brochure: Cables and Connectors		1206103-xx• Mounting Instructions: KCI 120 Dplus		1363647-xx• Product Notes for JAE connecting element		 576762-xx(Sheet 1)• Setup instructions		 1082415-xx