Product Information

ECN 1313
EQN 1325
ECN 1325
EQN 1337
Absolute Rotary Encoders
with Tapered Shaft
ID 768295-xx
ID 1178020-xx
ID 827039-xx
ID 1178019-xx
ID 1353127-xx
ID 1353128-xx
ID 1353130-xx
08/2023

ECN/EQN 1300 series

Absolute
ECN 1313

Absolute rotary encoders• 06 stator coupling for axial mounting• 65B tapered shaft

Akm
1
2
34
567892= Bearing of mating shaft= Required mating dimensions= Measuring point for operating temperature= Clamping screw for coupling ring; width A/F 2= Die-cast cover= Screw plug; widths A/F 3 and 4=	ECN/EQN: 12-pin PCB connector
ECN/EQN: 12-pin + 4-pin PCB connector= ECN/EQN: zero position of shaft and housing= M10 back-off thread= Self-locking screw: DIN 6912 – M5x50 – 08.8 SW4= Compensation of mounting tolerances and thermal expansion; no dynamic movement permitted= Direction of shaft rotation for ascending position values

Product Information ECN 1313/EQN 1325/ECN 1325/EQN 1337   

ECN 1325

EQN 1325

EQN 1337

Interface

EnDat 2.2

Ordering designation

EnDat01

EnDat22

EnDat01

EnDat22

Position values per revolution

8192 (13 bits)

33 554 432 (25 bits)

8192 (13 bits)

33 554 432 (25 bits)

Revolutions–Elec. permiss. speed/deviations2)

512 lines:
5 000 rpm/±1 LSB
12 000 rpm/±100 LSB
2048 lines:
1500 rpm/±1 LSB
12 000 rpm/±50 LSB

15 000 rpm(for continuous
position values)

512 lines:
5 000 rpm/±1 LSB
12 000 rpm/±100 LSB
2048 lines:
1500 rpm/±1 LSB
12 000 rpm/±50 LSB

15 000 rpm(for continuous
position values)

Calculation time tcal
Clock frequency

 9 µs
 2 MHz 7 µs 8 MHz 9 µs 2 MHz 7 µs 8 MHz

Incremental signals» 1 VPP1)–» 1 VPP1)–

Line count*

512

2048

512

2048

Cutoff frequency –3 dB

2048 lines:  400 kHz
512 lines:  130 kHz–2048 lines:  400 kHz
512 lines:  130 kHz–

System accuracy

512 lines: ±60”; 2048 lines: ±20”Electrical connection

12-pin12-pin16-pin with connection
for temp. sensor3)

Supply voltage

DC 3.6 V to 14 V

Power consumption(maximum)3.6 V:  0.6 W
14 V:  0.7 W

3.6 V:  0.7 W
14 V:  0.8 W

Current consumption (typical)

5 V: 85 mA (without load)

5 V: 105 mA (without load)

Shaft

Tapered shaft ¬ (9.25 mm); taper: 1:10

Mech. permiss. speed n

 15 000 rpm

Starting torque (typical)

0.01 Nm (at 20 °C)

Moment of inertia of rotor

2.6 · 10–6 kgm2

Natural frequency fN (typical)

1800 Hz

Permissible axial motion ofmeasured shaft±0.5 mm

Vibration 55 Hz to 2000 Hz
Shock 6 ms

 300 m/s2 4) (EN 60068-2-6); 10 Hz to 55 Hz constant over 4.9 mm peak to peak
 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

IP40 when mountedMass 0.25 kg

ID number

768295-03/-11768295-515)/-535)

4096 (12 bits)

2048

16-pin with connection
for temp. sensor3)

 12 000 rpm

1178019-011178019-515)* Please select when ordering1) Deviating tolerances Signal amplitude:
0.8 VPP to 1.2 VPP
Asymmetry:
0.05
Amplitude ratio:
0.9 to 1.1
Phase angle:
90° elec. ±5° elec.
Signal-to-noise ratio E, F:  100 mV2) Speed-dependent deviations between absolute and incremental signals

08/2023

2048

Product Information ECN 1313/EQN 1325/ECN 1325/EQN 1337   

08/2023827039-04/-06
827039-515)/-555)

1178020-01
1178020-515)

3) Evaluation optimized for KTY 84-1304) 	Valid in accordance with standard at room

temperature; at operating temperatures ofup to 100 °C:  300 m/s2;
up to 115 °C:  150 m/s2(≥ 100 °C: 10 Hz to 55 Hz constant over 2.45 mmpeak to peak)5) In collective package upon request3Mounting

Absolute
ECN 1313

EQN 1325

InterfaceSSI

Ordering designation

SSI01r1

Position values per revolution

8192 (13 bits)

Revolutions–

Electrically permissiblespeed/error2)

15 000 rpm/±12 LSB

Calculation time tcal

 5 µsIncremental signals» 1 VPP1)

Line count*

512

Cutoff frequency –3 dB

 500 kHz

System accuracy

512 lines: ±60”; 2048 lines: ±20”Electrical connection

16-pin (12+4) PCB connector

Supply voltage

4.75 V to 30 V DC

Power consumption (max.)

4.75 V:  600 mW
30 V:  775 mW

4.75 V:  675 mW30 V:  875 mW

Current consumption (typical)

5 V: 70 mA (without load)

5 V: 85 mA (without load)

Shaft

Tapered shaft ¬ (9.25 mm); taper: 1:10

Mech. permiss. shaft speed n 15 000 rpm

Starting torque (typical)

0.01 Nm (at 20 °C)

Moment of inertia of rotor

2.6 · 10–6 kgm2

Natural frequency fN (typical)

1800 Hz

Permissible axial motion of
measured shaft±0.5 mm

Vibration 55 Hz to 2000 Hz
Shock 6 ms

 300 m/s2 3) (EN 60068-2-6); 10 Hz to 55 Hz constant over 4.9 mm peak to peak 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

IP40 when mountedMass 0.25 kg

ID number1353127-02/-074)
1353128-01/-06
1353128-035)

SSI07r1
The tapered shaft of the rotary encoder is pressed onto the measured shaft and fastenedwith a central screw. The stator coupling is clamped by means of an axially tightenable
screw in a location hole.

4096 (12 bits)

Mounting accessories
Mounting aid
To avoid damage to the cable, use the mounting aid to connect and disconnect the cable
assembly. The pulling force must be applied solely to the connector and not to the wires.

2048

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 ATS software.

Interface
SSI position values 12 000 rpm

The position value is transmitted, startingwith the most significant bit (MSB), overthe data lines (DATA) in synchronism with aclock signal (CLOCK) provided by the control. The SSI-standard data word length forsingleturn encoders is 13 bits, and for multiturn encoders, 25 bits. In addition to theabsolute position values, incremental signals can also be transmitted. For a description of the signals, see 1 VPP incremental
signals in the Rotary Encoders brochure.
The following functions cannot beactivated via programming inputs:• Direction of rotation• Zero reset (setting to zero)

1353130-01/-03

Data transmission
T = 1 to 10 µs
tcal	See thespecifications
t1 	0.4 µs(without cable)
t2 = 17 to 20 µs
tR  5 µsn =	Data word length
13 bits for
ECN/ROC
25 bits for
EQN/ROQSSI01r1
SSI07r1

CLOCK and DATA
not shown* Please select when ordering
Signal amplitude: 0.8 VPP to 1.2 VPP
Asymmetry:
0.05
Amplitude ratio: 0.9 to 1.1
Phase angle:
90° elec. ±5° elec.
2) Speed-dependent deviations between absolute and incremental signals3) 	Valid in accordance with standard at room temperature; at operating temperatures ofup to 100 °C:  300 m/s2;
up to 115 °C:  150 m/s2 (≥ 100 °C: 10 Hz to 55 Hz constant over 2.45 mm peak to peak)4) Encoder with hybrid bearing
5) In collective package upon request
1) Deviating tolerances

4

Product Information ECN 1313/EQN 1325/ECN 1325/EQN 1337   

08/2023

Product Information ECN 1313/EQN 1325/ECN 1325/EQN 1337   

08/20235

Electrical connection

Pin layout SSI01r1 / SSI07r1
16-pin (12 + 4) PCB connector

ba16123456

Power supply
12+41b6a4bUPSensor
UP0V

12

Incremental signals
3a/Sensor Internal
0Vshield

Serial data transmission

2a5b4a3b6b1aA+A–

B+B–DATADATA

2b5aCLOCK CLOCK

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!

EnDat22 pin layout
16-pin PCB connector

ba16123456

12Power supply12+4

Other signals1)

Serial data transmission

1b6a4b3a6b1a2b5a1a1bUPSensor
UP0V

Sensor0V

DATADATA

CLOCKCLOCKT+2)

T–2)

1) Only for adapter cables inside the motor housing

2) Connections for external temperature sensor; evaluation optimized for KTY 84-130(see Temperature measurement in motors in the Encoders for Servo Drives brochure)
Cable shield connected with housing; UP = Power supply voltage; T = Temperature
Sensor: The sense line is connected in the encoder with the corresponding power line.
Vacant pins or wires must not be used!

EnDat01 pin layout
12-pin PCB connector

12Power supply
121b6a4bUP

SensorUP0V

Incremental signals
3a/

Sensor Internal0V
shieldSerial data transmission

2a5b4a3b6b1aA+

A–

B+

B–

DATA

DATA2b5aCLOCK CLOCK

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

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

1372211 · 01 · B · 02 · 08/2023 · 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.

Further information:
Comply with the requirements described in the following documents to ensure correctand intended operation:• Operating Instructions
1403368