Product Information

LS 1679
Incremental Linear Encoderwith Integrated Roller GuideApril 2016

LS 1679

32• Incremental linear encoder for measuring steps to 5 µm or 1 µm
• Integrated wear-free roller guide with steel ball bearings on steel rods
• Large mounting tolerances when connected by coupling rod or spring rod• Reference marks selectable every 50 mm

Ö,= Mounting options
F= Machine guideway
P= Gauging points for alignment= Required mating dimensions
= Reference mark position= Beginning of measuring length (ML)
 = Direction of scanning unit motion for output signals in accordance with interface description

2Product Information LS 1679

4/2016

Specifications

LS 1679

Measuring standard
Coefficient of linear expansion

Glass scale with DIADUR graduation–6 –1
therm  (8 ±1) · 10 K

Accuracy grade±10 µmMeasuring length ML* in mm

70 120 170 220 270 320 370 420 4701)

Reference marks*

One, located 35 mm from the beginning or end of the measuring length, or selectable via magnet
every 50 mmInterface

 TTL

Measuring step(after 4-fold evaluation)

5 µm

1 µm

Edge separation a1.6µs

 0.8 µsElectrical connection

Connecting cable, cable outlet at mounting block, left or right

Length*3 m/6 m1)

Connecting element*

With connector, male, 12-pin; coupling, male, 12-pin or with D-sub connector, 9-pin

Voltage supply(without load)

DC 5 V ±0.25 V/< 120 mA

Traversing speed 60 m/min

Required moving force

5N

Vibration 55 Hz to 2000 Hz
Shock 11 ms
Acceleration

150m/s (EN60068-2-6)
 300 m/s2 (EN 60 068-2-27)
 30 m/s2 in measuring direction

Operating temperature

0 °C to +50 °C

Protection EN 60 529

IP53 when mounted as per Mounting Instructions

Mass

0.46 kg + 1.34 kg/m measuring length2

Coupling the scanning unit* By coupling rod (accessory) or spring rod* Please select when ordering1)
Further lengths up to 2270 mm upon request

Product Information LS 1679

4/20163

Mounting accessories

Coupling rod
For coupling the LS 1679 to press brakes
and bending machines, includes bolts
ID 538768-01

Included in delivery

Coupling the scanning unit via coupling rod

F = Machine guideway

4

Product Information LS 1679

4/2016Electrical connection
Pin layout

12-pin M23 flange socket
or M23 coupling12-pin connector M23

Voltage supply

Incremental signals

Other signals

12210115681347/

UPSensor
UP0VSensor
0V

Ua1



Ua2

Ua0

Brown/GreenBlueWhite/
GreenWhite

Brown

GreenGray

Pink

RedBlack

Violet1)

9

Vacant Vacant2)–Yellow

Shield is on housing; UP = Power supply
Sensor: The sensor line is connected internally to the respective power supply.

9-pin
D-sub connector
for DELEM
control
Voltage supply

HEIDENHAIN

Incremental signals

953

82

71

6UP0V

Ua1



Ua2



Ua0

T1T1

T2

T2

T0

T0Brown

GreenGrayPinkRedBlack

DELEM
Brown/Green White/Green+ Blue+ White

Shield is on housing; UP = Power supply
Sensor: The sensor line is connected internally to the respective power supply.

Product Information LS 1679

4/2016

5

Cables and connecting elements

PUR connecting cable  8 mm
for encoders with coupling or flange socket

PUR connecting cable  8 mm
for encoders with connector

Complete with M23 connector(female), and M23 connector (male)

12-pin 298399-xx

Complete with M23 coupling (female), 12-pin 298400-xx
and M23 connector (male)With one M23 connector (female)

12-pin 309777-xx

With one M23 connector (female)

Cable only

12-pin 816317-xx

12-pin 298402-xx[4(2 · 0.14 mm2) + (4 · 0.5 mm2)]; AP 0.5 mm2

M23 connectors and couplings
Coupling on encoder cable

M23 coupling (male)Connector on encoder cable

M23 connector (male)

For cable

12-pin 291698-03

For cable

12-pin 291697-07

Mating element for coupling toencoder cable or flange socket

M23 connector (female)Mating element on connecting
cable for encoder connector

M23 coupling (female)

For connecting cable  8 mm12-pin 291697-05

For connecting cable  8 mm

12-pin 291698-02

Connector for connection an tosubsequent electronics

M23 connector (male)

For connecting cable  8 mm

12-pin 291697-08

 6 mm

 6 mmCouplings and M23 flange socket for mounting
M23 flange socket(female)
12-pin 315892-08

M23 mounted couplingwith flange (male)
For cable

 8 mm

M23 mounted couplingwith flange (female)

AP: Cross section of power supply lines

For cable

DR. JOHANNES HEIDENHAIN GmbH
Dr.-Johannes-Heidenhain-Straße 583301 Traunreut, Germany{ +49 8669 31-0| +49 8669 32-5061
E-mail: info@heidenhain.dewww.heidenhain.de358588 · 04 · B · 02 · 12/2016 · PDF

12-pin 291698-31

 8 mm12-pin 291698-07

This Product Information 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 made.
Related documents: Comply with the information in the following documents to ensure
the correct and intended operation of the encoder:• Catalog Linear Encoders for Numerically Controlled Machine Tools
571470-xx• Catalog: Interfaces of HEIDENHAIN Encoders
1078628-xx