Product Information

HMC 2Hybrid Motor Cable

08/2023

HMC 2: the single-cable solution
Power supply and communication via two wires

The universal design of the HMC 2 solution
gives motor and machine manufacturers
high flexibility, allowing them to use
standardized components on both themotor and the control.

Servomotors normally require two separate
cables:• An encoder cable for the motor’s rotary
encoder• A cable for powering the motor
With the HMC 2 hybrid motor cable,
HEIDENHAIN has integrated the encoder
cable into the power cable. As a result, onlya single cable is needed between themotor and the electrical cabinet.
The HMC 2 single-cable solution wasdesigned specifically for the HEIDENHAIN
EnDat 3 interface. It carries serial datatransmissions and power for the encoder
via two wires at cable lengths of up to100 m.

The HMC 2 solution also makes matterseasy on the control side of things, allowing
you to continue using your already existing
drives and controller units. The HMC 2cable is designed for easy assembly withthe appropriate connecting elements.

The HMC 2 single-cable solution can beused with motor encoders featuring theEnDat 3 interface (ordering designation:
E30-R2) and purely serial, two-wire datatransmission. Suitable rotary encoders are
currently the ExI 1100/1300 series forfunctionally safe applications with up toSIL 2, and the ExN 1300 for up to SIL 2.

Brake connections
Motor connections
Encoder connections

Similarly to HMC 6, HMC 2 accommodates
the wires for the encoder, motor and brakewithin a single cable. This cable isconnected to the motor via a special
connector. For connection to the frequency
inverter, the cable is split into power
connections, brake connections, and anencoder connector.
When implemented correctly, the motor
connection attains an IP67 rating.
Benefits
The HMC 2 single-cable solution offers aseries of cost and quality benefits formotor and machine manufacturers:• Smaller drag chains• Reduced mechanical requirements(flange socket on the motor and cableducts in the machine housing)• Reduced logistics for cables andconnectors• Easier and faster installation• Fewer required wear components• Smaller motor profile with cableattached, enabling easier integration intothe machine housing• HEIDENHAIN-tested combined powerand encoder cableComponentsPreparing a motor for the single-cable
solution requires only a handful ofcomponents.
Connecting element on the motor
The motor housing requires a standardized
angle flange socket that draws together
the brake wires, encoder wires and motor
power wires.

HMC 2 (M12)flange socket

HMC 2 (M12)connector

Power wires

Encoder output
cable inside themotor housing

Brake wires
Temperature wire

Encoder

Crimping tools
The crimp contacts for the brake wires,
power wires and encoder wires areassembled using typical tools.
Output cables inside the motor housing
The rotary encoder is connected via theoutput cable inside the motor housing.
Hybrid motor cable with a standardized
connector
The HMC 2 motor cable accommodates
the brake, power and encoder wires.

Downstream electronics
Encoder wires
Brake wires
Power wires

2

Product Information HMC 2    08/2023

Product Information HMC 2   08/2023

3

Components

Output cables inside the motor housing
Output cables for inside the motor housing
are available for rotary encoders of the ECI/EQI 1100, ECI/EQI 1300 and ECN/EQN 1300
series.
For information on compatible temperature
sensors, see the Encoders for Servo Drives
brochure.
Crimp connector
For joining (crimping) the wires of thetemperature sensor’s output cable to thewires of the temperature sensor in themotor winding.
ID 1148157-01

Output cable inside the motor(AGK)ECI/EQI 1100–

Service packFor field assembly of the HMC 2 hybrid
motor cable, the required components canalso be obtained individually.

–The crimp contacts for the brake, powerand encoder wires are included in theservice pack.

ECI/EQI 1300
ECN/EQN 13001)

15-pin PCB connector with wires for ID 1302347-xx
data transmission and a temperaturesensor2)

15-pin PCB connector and an M12
SpeedTEC angle flange socket fordata transmission and a 2-pin
connector for a temperature sensor

ID 1279930-xx

12-pin PCB connector for datatransmission, along with strain relief
on the encoder housing–

ID 1302701-xx1)

4-pin PCB connector and 2-pin
connector for a temperature sensor–ID 1302763-xx2)

12-pin PCB connector and an M23
SpeedTEC angle flange socket andstrain relief on the encoder’s cover–1)
2)

ID 1275042-xx

The connecting element must be suitable for the maximum data rate to be used
See Product Note D576762 regarding the temperature sensor connector

Angle flange socket

M12

M23Fastening hole circle

 23.75 mm

 28 mm

Contact pins

4x1.0 mm + 4x0.6 mm

4x2.0 mm + 4x1.0 mm

ID number

1304347-02 (0.5 mm )21304347-01 (1.5 mm2)1304347-03 (4.0 mm2)

Angle flange socket
Common angle flange sockets are used forthe electrical connection of the motor to thedownstream electronics. The two encoder
wires (communication and power), themotor power wires and the brake wires arebrought together inside the angle flange
socket.
Angle flange sockets are available with afastening hole circle in  23.75 mm and an
M12 external thread, or in  28 mm and an
M23 external thread.
Connectors and couplings
The M12 and M23 SpeedTEC connectors
are used for connection to the respective
angle flange socket. The M12 and M23
SpeedTEC couplings can be used in order
to extend cables.

M12 SpeedTEC
angle flange socket

Connectors

M12M23

Female contact

4x1.0 mm + 4x0.6 mm

4x2.0 mm + 4x1.0 mm

ID number1305176-02 (0.5 mm )21305176-01 (1.5 mm2)
1305176-03 (4.0 mm2)

M12

Hybrid motor cable with connectors
The HMC 2 cables are available withpower wires in cross sections of 0.5 mm2,
1.5 mm2 or 4.0 mm2. The cable end to beconnected with the drive is assembled
with a D-sub connector and 3-pin or 4-pin
power connector.

Hybrid motor cable with connectors (APK)The hybrid motor cable can also be used asa testing cable for the PWM 21.

Fully assembled with a straight M23
SpeedTEC connector

For other cable lengths, larger quantities,
and custom cable assemblies for the drive,please contact your HEIDENHAIN sales
agency.
EnDat 3 adapter (SA 1210)
Adapter for connecting an encoder with
EnDat 3 (E30-R2) to the PWM 21
15-pin D-sub connector (male) and15-pin D-sub connector (female)
ID 1317260-01

Fully assembled with a straight M12
SpeedTEC connector

PUR cable ¬ 9.3 mm
222(4 x 0.5 mm ) + (2 x 0.34 mm ) + (2 x 0.14 mm )10 m: ID 1279881-10
25 m: ID 1279881-25
50 m: ID 1279881-50
PUR cable ¬ 11 mm(4 x 1.5 mm2) + (2 x 0.75 mm2) + (2 x 0.25 mm2)
10 m: ID 1275291-10
25 m: ID 1275291-25
50 m: ID 1275291-50
PUR cable ¬ 15.8 mm(4 x 4.0 mm2) + (2 x 1.00 mm2) + (2 x 0.38 mm2)
10 m: ID 1352456-10
25 m: ID 1352456-25
50 m: ID 1352456-50

Please comply with the current user’s
manual for crimping tools from thecompany TE Connectivity.

4Product Information HMC 2    08/2023

Product Information HMC 2   08/2023

M23

Couplings

M12

M23

Contact pins

4x1.0 mm + 4x0.6 mm

4x2.0 mm + 4x1.0 mm

ID number

1305283-02 (0.5 mm )21305283-01 (1.5 mm2)
1305283-03 (4.0 mm2)

M12

Crimping tools
The brake, power and encoder wire
contacts for insertion into the angle flange
socket, connector or coupling are typicalcrimp contacts. Assembling them requires
only a crimping tool and adjusting aids.

M23 SpeedTEC
angle flange socket

M23

These crimping tools can be ordereddirectly from:TE Connectivity Industrial GmbH
Bernriederstraße 1594559 Niederwinkling, Germany
Tel.: +49 9962 2002-0
Fax: +49 9962 2002-70E-mail: intercontec@te.com
Web: www.te.com

5General electrical information

Use of the hybrid motor cables is subject tothe general electrical information containedin the Interfaces of HEIDENHAIN Encoders
brochure.

MotorController

EnDat 3 (E30-R2)
rotary encoder

Please also note the following:• Shielding must be implemented inaccordance with the earthing diagram.
• Unneeded brake wires must beconnected to earth on the power
module.
• The temperature range of the output
cable within the motor housing is –20 °C
to 120 °C (motor at rest).
• The NRTL certification of the HMC 2
hybrid motor cable is documented withthe following label: AWM Style 21223
80°C 1000V.
• Permissible cable length of up to 100 mand a data rate corresponding to theEnDat 3 specification• One section point is permissible for the
hybrid motor cable (extension of thehybrid motor cable).

Electrical characteristics

PEUVW

Motor

Motor
brake

Brake+Brake-

PUR jacket of
hybrid cable

Power module

1 = Accidental contact of the shield with other metal parts must be prevented
2 = Shields connected to the housing on the connector sideEarthing diagramImpulse withstand voltage

8 A2)≤ 1000 V (AC)

4 kV1)

2 x 0.34 mm (brake wires)

2–2–

2 x 0.14 mm (encoder wires)
M12 SpeedTEC connecting element
4 x ¬ 1.0 mm contact

8A≤ 630 V (AC/DC)

6 kV

4 x ¬ 0.6 mm contact

1A≤ 48 V (AC/DC)

1.5 kV1)
2)

Multi-wire PUR cable in accordance with DIN VDE 0298-4 Table 11, at an ambient temperature of +40 °C
Ampacity based on VDE 0298-4 Table 11, widened range for 0.5 mm2

SpeedTEC is a registered trademark of TE Connectivity Industrial GmbH.
Ampacity

Working voltage

Impulse withstand voltage

13.2 A1)≤ 1000 V (AC)4 kV

≤ 1000 V (AC)4 kV

PUR cable ¬ 11 mm
2

4 x 1.5 mm (power wires)2 x 0.75 mm (brake wires)2–2–

2 x 0.25 mm (encoder wires)
PUR cable ¬ 15.8 mm

System design in accordance with EN 61800-5-1

230.0 A1)

2 x 1.00 mm (brake wires)

2–2–≤ 300 V (AC)1 kV

4 x ¬ 2.0 mm contact

30 A≤ 630 V (AC/DC)

6 kV

4 x ¬ 1.0 mm contact

7A≤ 250 V (AC/DC)

2.5 kV4 x 4.0 mm (power wires)

HMC 2
Hybrid Motor Cable

MotorWorking voltage

PUR cable ¬ 9.3 mm

4 x 0.5 mm2 (power wires)
P_SD+
P_SD-Ampacity

2 x 0.38 mm (encoder wires)DriveController+ Power module

System voltage

Operating voltage
See HMC 2 components
under Electricalcharacteristics

SpeedTEC M23 connecting element1)

Ampacity in accordance with VDE 0891-1 at an ambient temperature of +40 °C

SpeedTEC is a registered trademark of TE Connectivity Industrial GmbH.

6Power wires

Encoder wires andbrake wires

System voltage(supply voltage of powermodule and controller)

300 V≤ 50 V

Voltage classC

Encoder wires: B
Brake wires: C

Overvoltage categoryIIIII

Working voltage

Test voltage< 50 V (AC/DC)

3.4 kV peak AC / DC
Test duration: 1 s

ETFE single wires
for output cables inside the motor
2

2 x 0.15 mm , twisted (power supply andencoder communication)

1)

2

2 x 0.15 mm with heat shrink tubing(temperature sensor connection)1)

In accordance with MIL-W-22759/18
Also comply with the specifications and mating dimensions for the M12 andM23 connectors from TE Connectivity Industrial GmbH.

Product Information HMC 2    08/2023

Product Information HMC 2   08/2023

7

Electrical connection

Mechanical characteristics

Outside diameter

Hybrid motor cable (0.5 mm2)with M12 connecting element

Hybrid motor cable (1.5 mm2)with M23 connecting element

9.3 mm ±0.2 mm

11 mm ±0.4 mm

Bend radius for stationary routing≥ 47 mm≥ 44 mm

Frequent flexing≥ 70 mm≥ 83 mm

Temperature for stationary routing–30 °C to 80 °C

Temperature for frequent flexing–20 °C to 60 °C1)15-pin connector (female)

2-pin connector (male)2152

HMC 2 8-pinM12 SpeedTECangle flange socket(male)
M121DCPower supply / Serial data transfer–20 °C to 80 °C

Frequent flexing ≤ 5 000 000 cycles

Connecting elementConnecting cycles ≤ 500

Protection EN 60529

IP67 on the motor side when connected

2Connections for an external temperature sensor

10562//21

M12AB//

P_SD+P_SD–1)

T+2)

T–2)

VioletYellowBrown

Green1)

SpeedTEC is a registered trademark of TE Connectivity Industrial GmbH.

1)

Power supply and data: P_SD+ contains UP (power supply)
P_SD– contains 0 V2)Connections for an external temperature sensor

Hybrid motor cable (4.0 mm2)with M23 connecting element
Outside diameter

15.8 mm

Pin layout of hybrid motor cable (0.5 mm2) with M12 connector technology

Bend radius for stationary routing≥ 79 mm

HMC 2 8-pin M12 SpeedTEC
connector (female)

Frequent flexing≥ 118.5 mm1)

M1215-pin D-sub connector(male)A4-pin header (male)

244Connecting element

Connecting cycles ≤ 500

Protection EN 60529

IP67 on the motor side when connected

32EncoderMaximum acceleration: 50 m/s at up to a 20 m traversing distance
Maximum speed: 300 m/min

SpeedTEC is a registered trademark of TE Connectivity Industrial GmbH.

VW

BrakePowerM12AB

CD123415

815//////4//

43////

3////

UVW///////

/

Earth

P_SD+

P_SD–1)

Brake+

Brake–UVWPEBlueWhite

Black 5

Black 6

Black 1

Black 2Black 3Yellow/GreenAlso comply with the specifications and mating dimensions for the M12 andM23 connecting elements from TE Connectivity Industrial GmbH.

U1MotorPower supply / Serial datatransfer2

3

15–40 °C to 90 °C (EN)–40 °C to 80 °C (UL)
Frequent flexing ≤ 5 000 000 cycles

Earth cableterminalC313-pin header(female)

4D

B–50 °C to 90 °C (EN)–50 °C to 80 °C (UL)

Drag chain

1)

1

4

9

2

Temperature for frequent flexingB15

 aximum acceleration: 5 m/s at up to a 3 m traversing distanceM
Maximum speed: 240 m/min

Temperature for stationary routing

A
3

EncoderDrag chain

1)

Pin layout for ECI/EQI 1100 output cables inside the motor housing1)

1)

Power supply and data: P_SD+ contains UP (power supply)
P_SD– contains 0 V
The HMC 2 hybrid motor cable has three cable shields (an outer shield, a shield for the encoder wires and a shield for the brake wires).
The cable shields are bonded with the M12 SpeedTEC connector housing.
Vacant pins or wires must not be assigned.

8Product Information HMC 2    08/2023

Product Information HMC 2   08/2023

9Electrical connection

Pin layout for output cables inside the motor housing for the ECI/EQI 1300 and ECN/EQN 1300

Pin layout for hybrid motor cable (4.0 mm2) with M23 connector technology

12-pin connector(female)

HMC 2 8-pin M23 SpeedTECconnector (female)

4-pin connector(female)1242-pin connector (male)
221HMC 2 8-pin
M23 SpeedTEC
angle flange socket(male)

CM23Bba

D 3
4

M23

4-pin header (male)

3-pin header(female)

4C

2A 1654321

D3

215-pin D-sub connector(male)

Earth cableterminal

3



4
B

115A

Encoder4Power supply / Serial data transfer

Connections for an external temperature sensor

2Encoder

1UVW

Motor

122b5a//4//

1a1b2//

21M23ABCD1432M23AB//

15815//////P_SD+

P_SD–1)

T+2)

T–2)

4//

43////

VioletYellow

Brown

Green3////

UVW/

//////

/

Earth

P_SD+

P_SD–1)

Brake+

Brake–UVWPEBlueWhite

Black 5

Black 6

Black 1

Black 2Black 3

Yellow/Green1)

Power supply / Serial datatransfer1)

Power supply and data: P_SD+ contains UP (power supply)
P_SD– contains 0 V2)Connections for an external temperature sensor1)

Pin layout for hybrid motor cable (1.5 mm2) with M23 connector technology
HMC 2 8-pin M23 SpeedTECconnector (female)

15-pin D-sub connector(male)

D

3

M23

4-pin header (male)

3-pin header(female)4C

2

Earth cableterminal

3



4
B

1

15

A

3

2EncoderPower1)

Power supply and data: P_SD+ contains UP (power supply)
P_SD– contains 0 V
The HMC 2 hybrid motor cable has three cable shields (an outer shield, a shield for the encoder wires and a shield for the brake wires).
The cable shields are bonded to the M23 SpeedTEC connector housing.
Vacant pins or wires must not be assigned.

1UVW

Motor
Brake

Power supply / Serial datatransferPower

M23AB

CD

143215815//////4//

43////

3////

U

VW/

//////

/

Earth

P_SD+

P_SD–1)

Brake+

Brake–UV

W

PE

GrayPink

Black 5

Black 6

Black 1

Black 2Black 3

Yellow/Green1)

Brake

SpeedTEC is a registered trademark of TE Connectivity Industrial GmbH.
4DR. JOHANNES HEIDENHAIN GmbH
Dr.-Johannes-Heidenhain-Straße 583301 Traunreut, Germany +49 8669 31-0
 +49 8669 32-5061
info@heidenhain.dewww.heidenhain.com

Power supply and data: P_SD+ contains UP (power supply)
P_SD– contains 0 V
The HMC 2 hybrid motor cable has three cable shields (an outer shield, a shield for the encoder wires and a shield for the brake wires).
The cable shields are bonded to the M23 SpeedTEC connector housing.
Vacant pins or wires must not be assigned.
Product Information HMC 2    08/2023

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: Cables and Connectors
1206103-xx• Brochure: Encoders for Servo Drives
208922-xx• Brochure: Interfaces of HEIDENHAIN Encoders
1078628-xx
For more information on EnDat 3, visit: www.endat.de
For brochures and Product Information documents, visit: www.heidenhain.com

1)1031305512 · 03 · A · 02 · 08/2023 · PDF