Product Information

ECN 1313
EQN 1325
Absolute Rotary Encoders
with Tapered Shaft and 01r1
or 07r1 SSI interface
ID 1353127-xx
ID 1353128-xx
ID 1353130-xx

04/2022

ECN/EQN 1300 series

AbsoluteECN 1313

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

EQN 1325

Interface

SSI

Ordering designation

SSI01r1

Position values per rev.

8192 (13 bits)

Revolutions–SSI07r1

4096 (12 bits)

Electrically permissible speed/ 15 000 rpm/±12 LSBerror2)
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(maximum)4.75 V:  600 mW
30 V:  775 mW

4.75 V:  675 mW
30 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

2048

Mech. permiss. shaft speed n  15 000 rpm

Akm
1234567892= Bearing of mating shaft= Required mating dimensions= Measuring point for operating temperature= Clamping screw for coupling ring: width A/F 2; tightening torque: 1.25 Nm –0.2 Nm= Die-cast cover= Screw plug: widths A/F 3 and 4; tightening torque: 5 Nm +0.5 Nm= ECN/EQN: 16-pin PCB connector (12+4)= ECN/EQN: zero position of shaft and housing= M10 back-off thread= Self-locking screw: DIN 6912 M5x50; width A/F 4; tightening torque: 5 Nm +0.5 Nm= Compensation of mounting tolerances and thermal expansion; no dynamic movement permitted= Direction of shaft rotation for ascending position values

ECN 1313/EQN 1325 Product Information    04/2022

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)
 2000 m/s2 (EN 60068-2-27)

Operating temperature–40 °C to 115 °C

Protection EN 60529

IP40 when mountedMass 0.25 kgID number

1353127-xx
1353128-xx4)

 12 000 rpm

1353130-xx* Please select when ordering
1)More rigorous tolerances	Signal amplitude:
0.8 VPP to 1.2 VPP
Asymmetry:
0.05
Signal ratio:
0.9 to 1.1
Phase angle:
90° ±5° el.
2)
Speed-dependent deviations between absolute and incremental signals
3)
Valid as per standard at room temperature; at operating temperatures of up to 100 °C:  300 m/s2;
up to 115 °C:  150 m/s2
4)
Encoder with hybrid bearing

ECN 1313/EQN 1325 Product Information    04/2022

3

MountingElectrical connection

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.

Output cables for ECN 1313 with SSI01r1 / EQN 1325 with SSI07r1
EPG output cables inside the motor housing ¬ 4.5 mm (with shield crimp ¬ 6.1 mm); 16 × 0.057 mm2
and TPE wires 2 × 0.25 mm2 for temperature sensor

Mounting accessories

With 12-pin PCB connector
and 17-pin M23 angle flange socket (male)

ID 332201-xxMounting 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.

With 12‑pin PCB connector
and unstripped cable end

ID 332202-xx

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.

Pin layout SSI01r1 / SSI07r1
17-pin M23 coupling or flange socket

16- pin (12+ 4) PCB connector

16Power supplyInterface
SSI position values

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

16

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

16

1

104

1115

16

12

13

14

17

8

91b6a4b3a/2a5b4a3b6b1a2b5aUP

Sensor
UP0V

A+

A–

B+

B–

DATA

DATA

CLOCK CLOCK

Brown/
GreenBlueWhite/
Green

Green/Black

Yellow/BlackBlue/
BlackRed/Black

GrayPink

Violet

56//

T+1)

T–1)

Sensor Internal0VshieldWhite/

Yellow

Cable shield connected to 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!
1)	Connections for an external temperature sensor (only for output cables inside the motor, see
Temperature measurement in motors); if used, please refer to the information about electromagnetic
compatibility in the General electrical information section of the Interfaces of HEIDENHAIN Encoders
brochure.

Brown1) White1)

CLOCK and DATA notshownDR. JOHANNES HEIDENHAIN GmbH
Dr.-Johannes-Heidenhain-Str. 583301 Traunreut, Germany +49 8669 31-0
 +49 8669 32-5061
info@heidenhain.dewww.heidenhain.com

4

Serial data transmission

7

Other signals

SSI01r1
SSI07r1

Incremental signals

ECN 1313/EQN 1325 Product Information    04/2022

1375075 · 00 · A · 02 · 04/2022 · PDF

This Product Information document supersedes all previous editions, which thereby
become invalid. The basis for ordering from HEIDENHAIN is always the ProductInformation document edition valid when the order is placed.

More information:
Comply with the requirements described in the following documents to ensure correctand intended operation:• Brochure: Encoders for Servo Drives					 208922-xx• Brochure: Cables and Connectors 						1206103-xx• Brochure: Interfaces of HEIDENHAIN Encoders			1078628-xx• SSI Interface Description							391244-xx• Mounting Instructions: ECN 1313, EQN 1325, ECN 1325, EQN 1337
1139530-xx