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8KS

b

c

d

.

ee

nnn

ff

gg

-

h

Cooling / Construction type

Size

Length

Motor encoder system

Nominal speed

Motor options

Special motor options

Motor version

Order keys only provide information about possible combinations in exceptional cases.

Cooling / Construction type (b)

8KS three-phase synchronous motors are available in cooling types 8KSC, 8KSD, 8KSJ, 8KSL and 8KSM.

Sizes

Type

Cooling type (b)

Cooling unit installation direction

Available mounting types

8KSC

Fan-cooled

Radial, left or right

Flange, B-side base

8KSD

Fan-cooled

Radial, left or right

Flange, A- and B-side base

8KSJ

Water-cooled

Right

Flange, B-side base

8KSL

Fan-cooled

Axial

Flange, B-side base

8KSM

Fan-cooled

Axial

Flange, A- and B-side base

Cooling type 8KSC has external cooling and a centrifugal fan installed on the side (left or right). The motor is installed with the mounting flange, which also serves as a cooling surface, on a mounting base in the B-side bearing area.

Cooling type 8KSD is based on motors of cooling type 8KSC and has an additional mounting base in the A-side bearing area.

8KSJ cooling type has external cooling and cooling water connections. The motor is installed with the mounting flange, which also serves as a cooling surface, on a mounting base in the B-side bearing area. Due to the design, base mounting on the A-side is not possible with this cooling type!

Size 9 8KSJ motors are equipped with two independent cooling circuits. The connection direction of size 8 8KSJ motors is always on the right. Size 9 must always be connected on both sides.

8KSL cooling type has external cooling and an axial fan installed on the back of the motor. The motor is installed with the mounting flange, which also serves as a cooling surface, on a mounting base in the B-side bearing area.

Size (c)

8KS motors are available in various sizes (8 or 8 and 9) depending on their construction. These different sizes are indicated by a number represented by (c) in the model number. The larger the number, the larger the flange dimensions and power rating for the respective motor.

Cooling type

Available sizes

8

9

C

Yes

Yes

D

Yes

--

J

Yes

Yes

L

Yes

Yes

M

Yes

---

Length (d)

8KS three-phase synchronous motors are available in four different lengths. These different lengths are indicated by a number represented by (d) in the model number.

Length

Available sizes

8

9

2

Yes

Yes

4

Yes

Yes

5

Yes

Yes

6

Yes

Yes

Motor encoder system (ee)

Resolver

LTN resolvers are used in 8KS servo motors.

Technical data for the resolver

Name

Order code (ee)

R0

Accuracy

± 6 angular minutes

Vibration during operation
55 < f ≤ 2000 Hz

≤ 500 m/s²

Shock during operation
Duration 11 ms

≤ 1000 m/s²

The shock values for the motor must be observed at all times!

EnDat 2.1 encoder

EnDat is a standard developed by Johannes Heidenhain GmbH that incorporates the advantages of absolute and incremental position measurement while also offering a read/write parameter memory in the encoder. With absolute position measurement (the absolute position is sampled serially), a homing procedure for referencing is usually not required. Where necessary, a multi-turn encoder should be installed. To reduce costs, a single-turn encoder and a reference switch can also be used. In this case, a homing procedure must be carried out. The incremental process allows the short deceleration periods necessary for position measurement when using drives with highly dynamic characteristics. With the sinusoidal incremental signal and the fine resolution in the EnDat module, a very high positioning resolution is achieved in spite of the moderate signal frequencies used.

Different types of EnDat 2.1 encoders can be used depending on requirements:

Technical data – EnDat 2.1 encoders

Name

Order code (ee)

E6

E7

Encoder type

EnDat single-turn

EnDat multi-turn

Operating principle

Optical

Optical

EnDat protocol

EnDat 2.1

EnDat 2.1

Resolution

2048-line

2048-line

Recognizable
Revolutions

---

4096

Number of lines

2048

2048

Accuracy

±20"

±20"

Cutoff frequency

≥400 kHz (-3 dB)

≥400 kHz (-3 dB)

Vibration during operation
55 < f ≤ 2000 Hz

≤ 300 m/s²

≤ 300 m/s²

Shock during operation
Duration 6 ms

≤ 2000 m/s²

≤ 2000 m/s²

Manufacturer's product ID

ECN 1313 EnDat01

EQN 1325 EnDat01

EnDat 2.2 encoder - safety-related position measurement systems

In machine and system manufacturing, the topic of safety is becoming more and more important. This is mirrored in legislation and stricter safety criteria in national and international standards. Most importantly, stricter requirements serve to protect personnel, but they also increasingly serve to protect property and the environment. The goal of functional safety is to minimize or eliminate dangerous situations that can occur in machines and systems either with or without operational errors. This is generally achieved by implementing redundant systems. Moving axes in safety-oriented applications require position information in order to be able to carry out their corresponding safety functions. Different system configurations can be implemented to get independent position values. One possibility is using two measuring instruments per axis. To keep costs down, the aim is often to create a solution with only one position measuring instrument. Until now, analog measuring instruments with sine/cosine signals were used for this purpose. The encoder manufacturer Heidenhain – as the first manufacturer with the purely serial EnDat 2.2 protocol for safety position measurement systems – offers a serial single-encoder solution in accordance with IEC 61 508 SIL2. All the advantages of serial data transfer – such as cost optimization, diagnostics possibilities, automatic commissioning and high-speed generation of position values – can now benefit safety applications as well.

100% inspection during production and additional measures during final testing ensure errors have not occurred related to shaft and coupling connections on rotary encoders when using motors with S encoders (in accordance with EN ISO 13849-2).

There are also a number of safety functions that are already possible with D encoders.

For information about the area of application and procedure for setting up the various safety functions, please refer to the SafeMOTION user's manual (MAACPMSAFEMC-ENG) in the Downloads section of the B&R website www.br-automation.com.

Technical data

EnDat 2.2 encoders can be used for functional safety in single-turn or multi-turn form, depending on requirements.

Name

Order code (ee)

S0

S1

Encoder type

EnDat single-turn functional safety

EnDat multi-turn functional safety

Operating principle

Optical

Optical

EnDat protocol

EnDat 2.2

EnDat 2.2

Position values per revolution

33 554 432 (25-bit)

33 554 432 (25-bit)

Distinguishable revolutions

---

4096

Precision

±20"

±20"

Vibration during operation

10 to 2000 Hz

≤300 m/s2 (IEC 60068-2-6)

≤300 m/s2 (IEC 60068-2-6)

Shock during operation

Duration 6 ms

≤2000 m/s2 (IEC 60068-2-27)

≤2000 m/s2 (IEC 60068-2-27)

Manufacturer's product ID

ECN 1325 FS EnDat22

EQN1337 FS EnDat22

Nominal speed (nnn)

8KS three-phase synchronous motors can be delivered with different nominal speeds depending on the size and length.

Motor size and length

Available nominal speeds nN [rpm]

1000

1100

1500

1600

2000

2500

3000

8KSC8

--

Yes

--

Yes

Yes

Yes

Yes

8KSD8

--

Yes

--

Yes

Yes

Yes

Yes

8KSL8

--

Yes

Yes

Yes

Yes

Yes

8KSM8

--

Yes

--

Yes

Yes

Yes

Yes

8KSC92,94

Yes

--

Yes

--

Yes

Yes

Yes

8KSC95

Yes

--

Yes

--

Yes

Yes

--

8KSC96

Yes

--

Yes

--

Yes

--

--

8KSL92,94

Yes

--

Yes

--

Yes

Yes

Yes

8KSL95

Yes

--

Yes

--

Yes

Yes

--

8KSL96

Yes

--

Yes

--

Yes

--

--

Motor size and length

Available nominal speeds nN [rpm]

1000

1500

2000

2500

3000

8KSJ82, 84, 85

Yes

Yes

Yes

Yes

Yes

8KSJ86

Yes

Yes

Yes

Yes

--

8KSJ92

Yes

Yes

Yes

Yes

--

8KSJ94

Yes

Yes

Yes

--

--

8KSJ95

Yes

Yes

--

--

--

8KSJ96

Yes

--

--

--

--

Determining the order code for motor options (ff)

The respective code (ff) for the order key can be found in the following table:

Motor options for cooling types C, D and J (centrifugal fans and water cooling)

Motor option

Connectiondirection

Oil seal

Holding brake

Shaft end

Mounting direction / connection direction

Cooling unit

Code for the order key (ff)

Terminal box on the top, cable outlet is 270° (right)

No

No

Smooth

Fan on the left

A0

Keyed

Fan on the left

A1

Normal

Smooth

Fan on the left

A2

Keyed

Fan on the left

A3

No

Smooth

Fan/Water lines on the right

B0

Keyed

Fan/Water lines on the right

B1

Normal

Smooth

Fan/Water lines on the right

B2

Keyed

Fan/Water lines on the right

B3

NOTE: For 8KSJ motors, it is onlypossible to select "B" options since the water lines on the 8KSJ8 are always located on the right side. For size 8KSJ9, it must always be connected on both sides since two cooling circuits must be supplied.

Motor options for cooling types L and M (axial fans)

Motor option

Connection direction

Oil seal

Holding brake

Shaft end

Mounting direction / connection direction for the cooling unit

Code for the order key (ff)

Terminal box on the top, cable outlet is 270° (right)

No

No

Smooth

Axial

C0

Keyed

Axial

C1

Normal

Smooth

Axial

C2

Keyed

Axial

C3

Special motor options (gg)

The respective code (gg) for the order key can be found in the following table.

Determining the order code for special options (gg)

Special option

Order code

No special option

00

Reinforced bearings

04

Square filter for centrifugal fans (cooling type C and D)

15

Motor version (h)

The motor version is automatically specified by the configurator and can be seen in the technical data.

Example order 1

A fan-cooled 8KS three-phase synchronous motor with size84 is selected for the application. The motor should be equipped with a mounting base on the A side in addition to the existing mounting base on the B side. The name is therefore 8KSD. A single-turn encoder with functional safety was chosen. The required speed is 2500 rpm. The radially-mounted fan should be on the left side of the motor. A brake is not required, the output shaft should be smooth. The fan should be equipped with a filter that is available as a special option.

The code (ee) for the encoder system is S0.

The code (nnn) for a nominal speed of 2500 rpm is 025.

The option code (ff) for fan-cooled 8KS motors with the fan on the left side is always "A". All 8KS motors are equipped with a terminal box (position on the top and cable channel outlet on the right, that corresponds to 270°). The no holding brake and smooth shaft options result in "0", so the option code is "A0"

The special option code (gg) for the filter (square filter) is 15.

The model number for the required motor is 8KSD84.S0025A015-0

Example order 2

A water-cooled 8KSJ three-phase synchronous motor with size92 is selected for the application. A multi-turn encoder with functional safety was chosen. The required speed is 2000 rpm. A brake is not required, the output shaft should have a keyway.

The code (ee) for the encoder system is S1.

The code (nnn) for a nominal speed of 2000 rpm is 020.

The option code (ff) for water-cooled 8KSJ motors is always "B". All 8KS motors are equipped with a terminal box (position on the top and cable channel outlet on the right, that corresponds to 270°). The no holding brake and shaft key options result in "1", so the option code is "B1"

No special options.

The model number for the required motor is 8KSJ92.S1020B100-0

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