HEIDENHAIN PWM 8 User Manual

Software
246 199-11

Operating Instructions

Diagnostic Set

03/2003

1. Contents

1. Contents ......................................................................................................................................................1

2. General Information....................................................................................................................................... 5

2.1 Safety Instructions................................................................................................................................. 5

2.2 Description of the PWM 8 Phase Angle Measuring Unit....................................................................... 5

2.3 Functions of PWM 8.............................................................................................................................. 5

2.4 Power Supply ........................................................................................................................................ 6

2.5 Items Supplied....................................................................................................................................... 6

2.6 Software ................................................................................................................................................ 7

2.7 Explanation of the Display..................................................................................................................... 7

2.8 Setting the Display Contrast................................................................................................................ 10

3. Operation..................................................................................................................................................... 11

3.1 Display after Power-On ....................................................................................................................... 11

3.2 Standard Soft-Key Row....................................................................................................................... 11

4. Description of the PWM 8 MODE................................................................................................................ 15

4.1 Switching the PWM 8 MODE ..............................................................................................................15

4.2 PWM 8 MODE: UNIVERSAL COUNTER with Frequency Display .....................................................15

4.3 PWM 8 MODE: DETERMINE PULSE NUMBER with Frequency Display .......................................... 16

4.4 PWM 8 MODE: MEASURE U/I ...........................................................................................................17

4.4.1 Display of the PWM 8 MODE: MEASURE U/I in the Mode Window........................................ 18

4.5 PWM 8 MODE: MEASURE AMPLITUDES ......................................................................................... 20

4.5.1 Measuring the Signal Amplitudes with 11µApp Interface Board: ............................................. 21

4.5.2 Measuring the Signal Amplitudes with 1Vpp Interface Board .................................................. 21

4.5.3 Measuring the Signal Amplitudes with TTL or HTL Interface Boards ......................................22

5. EXPERT MODE ..........................................................................................................................................23

5.1 Activating the EXPERT MODE............................................................................................................ 23

5.2 Auxiliary Functions in the EXPERT MODE ......................................................................................... 23

5.2.1 The PRESET Editor ................................................................................................................. 24

5.2.2 The Parameters .......................................................................................................................25

5.2.3 Parameter Overview ................................................................................................................25

6. Practical Application .................................................................................................................................... 29

6.1 Power Supply of PWM 8 and Encoder................................................................................................ 29

6.1.1 Power Supply of PWM 8 and Encoder via DC-IN Socket ........................................................ 29

6.1.2 Power Supply of PWM 8 and Encoder via the Encoder Output (OUT) of the

Interface Board......................................................................................................................... 30

6.1.3 PWM 8 Power Supply via DC-IN Socket and Encoder Output (OUT) of the

Interface Board......................................................................................................................... 32

6.1.4 Voltage Monitoring Function of Encoder Supply...................................................................... 33

6.1.5 Block Diagram: PWM 8 Power Supply Unit .............................................................................35

7. Calibration ................................................................................................................................................... 36

- 2 -

8. Specifications .............................................................................................................................................. 37

8.1 Pin Layouts of the Interface Boards .................................................................................................... 37

8.1.1 Pin Layout of the 11µApp Interface Board ............................................................................... 37

8.1.2 Pin Layout of the 1Vpp Interface Board ................................................................................... 37

8.1.3 Pin Layout of the TTL Interface Board .....................................................................................38

8.1.4 Pin Layout of the HTL Interface Board.....................................................................................38

8.2 Pin Layout of the Power Supply Socket on PWM 8 ............................................................................38

8.3 Specifications of PWM 8 Base Unit..................................................................................................... 39

8.4 Specifications of 11µApp Interface Board ........................................................................................... 40

8.5 Specifications of 1Vpp Interface Board ............................................................................................... 40

8.6 Specifications of TTL Interface Board ................................................................................................. 41

8.7 Specifications of HTL Interface Board................................................................................................. 42

8.8 Specifications of Power Supply Unit ................................................................................................... 42

9. Description of FST 2 Leak Tester................................................................................................................ 43

9.1 Explanation of the Controls and Displays ........................................................................................... 43

9.2 Example for Application....................................................................................................................... 44

9.3 Specifications of FST 2 .......................................................................................................................45

10. Description of ROD 450 Rotary Encoder .................................................................................................. 46

10.1 Specifications of ROD 450 ................................................................................................................ 46

11. Description of Connecting Cable 10-30V DC ............................................................................................ 46

12. Measuring Setup and Tolerances of the Output Signal............................................................................. 47

12.1 Description of the Output Signal ....................................................................................................... 51

12.1.1 Output Signals........................................................................................................................ 51

12.1.2 Output Signals........................................................................................................................ 52

12.1.3 Output Signals........................................................................................................................ 53

12.1.4 Output Signals........................................................................................................................ 55

13. Adapter Connectors .................................................................................................................................. 57

13.1 Overview of the Adapter Connectors ................................................................................................57

13.2 Adapter connector for exposed linear encode .................................................................................. 58

13.3 Adapter-connector for ERN 1387...................................................................................................... 59

14. Pin Layouts of Standard HEIDENHAIN Cables......................................................................................... 60

15. Description of the interface board, 1 Vpp, absolute (with Zn/Z1-track; EnDat/SSI;

SSI-programmable) ................................................................................................................................... 64

15.1 General information........................................................................................................................... 64

15.1.1 1 Vpp measuring systems with Zn/Z1 track .......................................................................... 64

15.1.2 1 Vpp measuring systems with EnDat interface.................................................................... 65

15.1.3 1 Vpp measuring systems with SSI interface and 5V supply voltage ...................................65

15.1.4 1 Vpp measuring systems with SSI interface and HTL supply voltage ................................. 66

15.1.5 1 Vpp measuring systems with programmable SSI interface................................................ 66

16 Items supplied ............................................................................................................................................ 67

16.1 Hardware........................................................................................................................................... 67

16.2 Adapter Cables overview ..................................................................................................................67

16.3 Incremental Zn/Z1 ............................................................................................................................. 68

16.4 Absolute EnDat/SSI .......................................................................................................................... 69

16.5 Absolute EnDat/SSI motor encoder ..................................................................................................70

- 3 -

17 Software Description ..................................................................................................................................71

Note: The successor is PWM 9, Id.Nr. 512 134-01.
PWM 8 can be upgraded to PWM 9 by a hardware update.
The upgrade is available for a fee!
(More information: HEIDENHAIN Spare Parts Sales
Phone: [phone])

17.1 Required software version................................................................................................................. 71

17.2 Selecting the encoders via soft keys................................................................................................. 71

17.2.1 Via the selection screen......................................................................................................... 71

17.2.2 Via parameter P9 in the EXPERT MODE .............................................................................. 71

17.2.3 Switching the AB and CD tracks for 1Vpp encoders with Zn/Z1............................................ 72

17.3 1 Vpp measuring systems with programmable SSI interface........................................................... 73

17.3.1 Activating the menu for additional functions........................................................................... 73

17.3.2 Switching the encoder supply to HTL..................................................................................... 74

17.3.3 Parameter P10 "sensor connection" with programmable SSI encoders ................................ 75

18 Specifications: Interface Board 1Vpp, absolute.......................................................................................... 76

18.1 Encoder input (IN) ............................................................................................................................. 76

18.2 Encoder output (OUT)....................................................................................................................... 76

18.3 Signal assignment of the BNC sockets ............................................................................................. 76

18.4 Measuring encoder current/voltage................................................................................................... 76

18.5 Measuring signal amplitudes............................................................................................................. 76

18.6 Display of /UaS interference signal .................................................................................................. 76

18.7 Terminating resistors......................................................................................................................... 76

18.8 Pin layouts of drive encoders and absolute encoders....................................................................... 77

18.8.1 1 Vpp measuring system with Zn/Z1 track............................................................................ 77

18.8.2 1 Vpp measuring system with EnDat interface .....................................................................77

18.8.3 1 Vpp measuring system with programmed SSI interface .................................................... 78

18.9 Adapter kit for non-HEIDENHAIN wiring .......................................................................................... 79

18.9.1 Adapter kit 1 (Zn/Z1) for operation with Siemens and JH drives with

HEIDENHAIN Zn/Z1 encoders and non-HEIDENHAIN wiring................................................ 79

18.9.2 Adapter kit 2 (EnDat/SSI) for operation with Siemens drives with HEIDENHAIN

18.10 Adapter cables for direct connection of PWM8 to the PCB connector of the encoder ..................81

18.10.1 Adapter cable with 12-pin PCB connector ...........................................................................81

18.10.2 Adapter cable with 14-pin PBC connector ...........................................................................82

18.11 Adapter cable 17/17-pin; PWM to motor (Pos.Enc.EnDat) ............................................................83

18.12 Adapter cable to IK 115 interface card........................................................................................... 84

18.13 Adapter cable 17/17-pin; PWM to motor (Mot.Enc.EnDat) ............................................................ 85

18.14 Adapter cable 17/17-pin; PWM to motor (Mot.Enc.EnDat) ............................................................ 86

18.15 Adapter cable 17/25-pin; PWM to subsequent electronics (Mot.Enc.1Vpp) .................................. 87

18.16 Adapter cable 17/25-pin; PWM to subsequent electronics (Mot.Enc.EnDat)................................. 88

18.17 Adapter cable 17/17-pin; PWM to motor (Mot.Enc.EnDat) ............................................................ 89

EnDat/SSI encoders and non-HEIDENHAIN wiring ............. 80

- 4 -

2. General Information

2.1 Safety Instructions

Do not put defective units into operation!

1.

0

Fig 1: Connecting the PWM 8 in the position control loop of a machine tool controlled by TNC

In order to correctly judge the problems in a machine tool controlled by TNC, fundamental knowledge of the
machine tool and its drives as well as their interaction with the measuring systems is required.

Inexpert handling may cause considerable damage and personal injury.

HEIDENHAIN is not liable for any damage or personal injury caused directly or indirectly or by improper use
or incorrect operation.
Warning: Do not change any parameters or encoder voltages at the PWM while the machine tool is

I

moving and a PWM is connected.

2.

2.2 Description of the PWM 8 Phase Angle Measuring Unit

The PWM 8 phase angle measuring unit is a universal measuring unit for inspecting and adjusting
HEIDENHAIN linear and rotary encoders.
The unit is operated by means of 5 soft keys. All values are displayed in a graphics display field. For each of
the different encoder interfaces (11µApp, 1Vpp, TTL and HTL) a separate interface board is required. Each
interface board is equipped with an encoder input (IN) and an encoder output (OUT). The unaltered scanning
signals are available at the encoder output to be fed into e.g. a subsequent electronics. The PWM 8 may
also be connected in series between the measuring system and the subsequent electronics. The axis
functions of the machine tool are not impaired. It is also possible to use the PWM 8 separately for inspecting
and adjusting measuring systems.

2.3 Functions of PWM 8

The main functions of PWM 8 are:

• Display of phase angle and on-to-off ratio

• Display of the scanning frequency

• Measurement of signal amplitude, current consumption and supply voltage of the encoder

• Display of the internal universal counter or the signal periods of a rotary encoder (pulse count)

• Display of reference signal, fault detection signal and counting direction

• Output of the amplified scanning signals (interface board: 11µApp, 1Vpp) or the original scanning signals

(interface board: TTL, HTL) via 3 BNC sockets (e.g. to an oscilloscope)

- 5 -

The following functions are available in the EXPERT MODE:

• Input of a preset for the internal universal counter

• Encoder voltage selectable

• Settings (e.g. dialogue language) programmable via parameters

2.4 Power Supply

Possibilities of powering PWM 8

• Line-powered via a separate 24V power supply unit (standard set)

• By an external, non-floating dc voltage source of 10 - 30 V / approx. 1 Ampere (adapter cable supplied

with PWM 8).

• Via the subsequent electronics; encoder, PWM 8 and subsequent electronics must be connected in

series (Caution: power consumption of PWM 8 approx. 5.5W).
The power supply of the measuring systems (external power supply unit or subsequent electronics) is
selected via the soft keys of PWM 8.
If a voltage is connected to the DC-IN socket of PWM 8, the PWM base unit is always operated with this
voltage.

If PWM 8 and/or the encoder are to be powered via the subsequent electronics,

• the encoder monitoring function of the subsequent electronics is active;

• it can be selected, how the encoder voltage of the subsequent electronics is fed to the encoder via

PWM 8:

1. directly to the encoder (via parameter: P2 in EXPERT MODE)

2. via the switching regulator (integrated in PWM 8) with potential segregation and possibility of setting
the encoder voltage.

2.5 Items Supplied

Diagnostic Set Items Id.No.

Id.No. 312 431 01 Id.No. 312 431 02

+ + PWM 8 309 956 ..
+ Option FST 2 251 697 ..
+ Option ROD 450 295 455 A1
+ + Power supply unit 313 797 ..
+ +
+ + Adapter 10-30V DC 317 293 01
+ + BNC cable (3 pcs.) 254 150 02
+ + Connecting cable 9-pin 309 773-01
+ + Connecting cable 12-pin 298 399-01
+ + Operating instructions 312 737 ..
+ Option Interface board 11µApp 323 083 ..

Option Option Interface board 1Vpp 323 077 ..
Option Option Interface board TTL 323 079 ..

Power cord 240V∼

223 775 01

Option Option Interface board HTL 322 732 ..
Option Option Interface board Zn/Z1, EnDat,

SSI

1)

Description of the Interface board Id. Nr. 312 186 .. in section 15.

- 6 -

312 186 ..

1)

2.6 Software

For the PWM 8 phase angle measuring unit the following dialogues are available:

Dialogue Software - Id.No.

English / German 246 199-xx
English / French 246 200-xx

2.7 Explanation of the Display

Structure of the display

The following information is permanently displayed:
a): Information on the encoder:

Display: The supply voltage for the encoder is switched on.

Display: The supply voltage for the encoder is switched off.

Display: Reference signal
(no reference signal available)

The reference signal is displayed;
no real-time display of the reference signal!

Display: Fault detection signal
(no fault detection signal generated)

Fault detection signal generated, (active: low); at the same time
the fault detection signal memory (ERROR) is set.

No fault detection signal generated; the fault detection signal memory
(ERROR) has been set by an earlier fault.
The fault-detection memory can be deleted by:

1. activating another PWM 8 mode

2. switching the encoder voltage off and on

The last two places (xx) of the Id.No. represent
the software version.

Information on the encoder

Measuring range and scaling of the PHA/TV display

PHA/TV display with peak hold
(here: maximum error: +TV2)

Display field for PWM 8 modes (here: UNIVERSAL
COUNTER and frequency display)

Soft-key row for operation

Current assignment of the BNC sockets

3. by pressing the soft key
Display of the counting direction: Encoder moves in forward direction

Display of the counting direction: Encoder moves in backward direction

of the INFO soft-key row.

- 7 -

b): Measuring range and scaling of the PHA/TV display:

Definitions:

TV1, TV2 : On-to-off ratio incremental signal 1, incremental signal 2.

At the zero crossover analogue incremental signals are triggered, i.e. converted into square-wave signals.
One period (= on-time plus off-time of a square-wave signal) is subdivided into 360°.
If on-time and off-time of a square-wave signal are the same, i.e. 180° each (180° + 180° = 360°), the
on-to-off ratio is 0°. If the on-time of a square-wave signal exceeds the off-time, the on-to-off ratio is positive.
An on-to-off ratio of e.g. +10° means the on-time of the square-wave signal is 190° (180° + 10°) and the
off-time 170° (180° - 10°).

PHA: Phase angle error between incremental signal 1 and incremental signal 2.
If the incremental signal 1 leads the incremental signal 2 by 90°, the phase angle error is 0°. The phase
angle error is the deviation from the optimum phase shift of 90° dimensioned in degrees.

PHA/TV Display:

PHA and TV are displayed as bars. The scaling of the PHA/TV display can be set for different measuring
ranges.

With automatic switch-over of the measuring range the (graduated) range of the PHA/TV display is
automatically adapted to the biggest error (longest bar).

If the measuring range is exceeded with manual switch-over of the measuring range, an
error is displayed. Switching over the measuring range: see standard soft-key row in section 3.2

Measuring range of the PHA/TV display (here ± 25°)

With automatic switch-over of the measuring range the
longest bar defines the measuring range.

Symbol for automatic switch-over of the measuring range.

Error display for: on-to-off ratio incremental signal 1 (TV1),
on-to-off ratio incremental signal 2 (TV2), phase angle error
between the two incremental signals (PHA)

Measuring range exceeded in negative direction

Measuring range exceeded in positive direction

Manual switch-over of the measuring range

- 8 -

c): Peak hold of the PHA/TV display:

The peak hold holds and displays the maximum positive and negative value of the PHA/TV error.
It can be deleted by selecting a MODE or if the measuring range is exceeded. With automatic switch-over of
the measuring range, peak hold is not active for PHA/TV display.

Manual start and stop of peak hold:

If the peak-hold display is to be valid only for a certain measuring range, it can be started and stopped by
hand. Manual operation is made by means of the MODE soft-key row:

Display of positive peak hold

Display of negative peak hold

Soft key for manual control of the peak-hold display

Soft key for manual start of the peak-hold display in standard operation. The already existing
peak-hold display is deleted.

After pressing the START soft key the STOP soft key is displayed. If this soft key is pressed, the
peak-hold display is frozen and the bars of the PHA/TV display are hidden. Now the peak-hold
display can be read.

After pressing STOP, this soft key is displayed inverted which signals "frozen status". By pressing
the inverted soft key, the peak-hold display switches back to its initial status (standard operation).

d): Display field for PWM 8 MODE:

All MODES are displayed in the MODE window:

See section 4, Description of the PWM 8 MODES

Headline MODE
(here additionally: edge evaluation of the
UNIVERSAL COUNTER))

Display field for the different MODES:

• UNIVERSAL COUNTER

• DETERMINE PULSE NUMBER

• MEASURE CURRENT/VOLTAGE

• MEASURE AMPLITUDES

- 9 -

e): Soft-key row for operation of PWM 8:

The soft-key row makes PWM 8 easy to operate. It automatically configures itself according to the functions
currently available.

Example: Soft-key row after power-on:

f): Display field for the current assignment of the BNC sockets A, B and C:

Standard setting of the soft-key row

This field contains the encoder signals currently fed to the
three BNC sockets BNC A, B and C.

2.8 Setting the Display Contrast

The contrast of the LC display of PWM 8 (Id.No. 309 956 X2) can be set from outside. The trimmer for
contrast adjustment is located next to the BNC socket C. A trimming screwdriver is required to change the
contrast. The contrast of PWM 8 units with the Id.No. 309 956 X1 can only be set internally.

- 10 -

3. Operation

3.1 Display after Power-On

Note on software compensation data:

The software compensation display is intended for calibration by HEIDENHAIN staff.
The settings displayed can only be changed by HEIDENHAIN, Traunreut.

Software-Id.No. 246 199-xx;
the last two places symbolize the software
version (here: version 01)

Automatic recognition of the interface board
(here: TTL interface)

EXPERT MODE is active;
see section 5

Software compensation data
(for calibration by HEIDENHAIN staff)

3.2 Standard Soft-Key Row

After the power-on display, the standard soft-key row is displayed.

Possibilities of setting the standard soft-key row:

Switches to the soft-key row PWM 8 MODE
(see PWM 8 MODE in section 4)

Assignment of the BNC sockets A, B and C to different encoder signals;
after pressing the BNC soft-key, you can choose from the following options:

The default setting of the BNC memories made by HEIDENHAIN can be changed any time.

By pressing this soft key the BNC sockets A
to C can be assigned to the encoder signals
from memory 1 to 3.

Terminate assignment of BNC sockets

- 11 -

If e.g. the soft key BNC A is pressed, the assignment of the BNC socket A can be changed:

Terminate BNC assignment

Switching the BNC memory:

The assignment of the BNC sockets is stored in three BNC memories that can be called
successively.

Each time the soft key

is pressed, the next BNC memory is activated.

The display of the active BNC memory is highlighted:

Changing the signals in the BNC memories 1 to 3:

The signal in the active BNC memory is automatically stored each time it is changed by

Assignment of sockets B and C can be selected

Arrow keys to change the encoder signals of the
selected BNC socket A

pressing the soft keys

or

.
After power interruption the signals of the BNC memory active last are allocated to the BNC
sockets.

Notes on the use of the BNC sockets:

• When using the BNC sockets to measure the encoder signals with an oscilloscope,

be sure that the workstation and the operator are properly grounded!

• A floating oscilloscope should be used to display the encoder signals with as little interference

as possible. Always connect the oscilloscope to the socket of the switch cabinet of the machine
tool to avoid signal distortions caused by different ground potentials.

The following encoder signals can be connected with the BNC sockets:

Interface Board Encoder signals on BNC socket BNC

memory

11µApp Ue1

1Vpp A

TTL, HTL Ua1

BNC A BNC B BNC C

U1+2

Ue0

A+B

R

/Ua1

Ua0

Ue2

U1+2

Ue0

B

A+B

R

Ua2
/Ua2
/Ua0

Ue0

NTR

/UaS *)

R

NTR

/UaS *)

Ua0

/Ua0

/UaS

1
2
3

1
2
3

1
2
3

*) Signal is generated in the PWM 8.

- 12 -

Switching over the measuring range of the PHA/TV scaling.
The following measuring ranges can be selected:

The scaling currently selected is highlighted. When choosing automatic scaling (auto), the scaling
is adapted to the biggest error (longest bar).

This soft key serves to activate the Options soft-key row.
The following functions are available:

Terminate Options

EXPERT-MODE; see section 5

The encoder can be powered INTERNALLY
(by the power supply unit) or EXTERNALLY (by
the subsequent electronics). Current setting:
encoder powered INTERNALLY

The power supply for the encoder can be switched
ON and OFF.

The terminating resistors for the scanning signals
(with TTL or HTL and 1 Vpp interface board only)
can be switched ON and OFF. The current setting is
stored in PWM 8 and reloaded after power
interruption.

1)

only possible with interface board Id.No. 323 077-XX or 312 246-01, index A

Interface board

0 V +U

TTL 91 215 yes
HTL 1200 1200 yes
1Vpp 121 yes

11µApp not available

Terminating resistor [Ω]

Switch-

encoder

able

1)

The active setting is highlighted in the Options soft-key row.

Note:

The soft key
subsequent electronics (with encoder supply voltage) is connected to the encoder output of the
interface board.

- 13 -

is only displayed, if the PWM 8 is part of the encoder circuit, i.e. if a

This soft key serves to display the Info soft-key row:

Terminate INFO

If more information is available, the PWM switches
to the next INFO screen.

The interfering signal memory (ERROR) can be
erased

The background lighting of the display can be
switched on and off.

Information on PWM 8 and on the interface board can be displayed on the INFO screen.

Possible displays:

Encoder voltage of the subsequent electronics too
low to ensure proper function; see section 6:
Practical Application

11µApp, 1Vpp, TTL or HTL interface board

Terminating resistors for encoder signals: ON
here: 200 Ω on + and 91 Ω on GND

The supply voltage for the encoder is provided
INTERNALLY (power supply unit).

Counting direction of the UNIVERSAL COUNTER
(here: backward counting when encoder moves in
forward direction).

The power supply of the encoder can be set to 10V
max. without limit (except HTL); see section 3.2.2
Parameter Programming

The UNIVERSAL COUNTER starts with the next
reference pulse.

With the interface board 11µApp the amplification of
the output signals is indicated. The output signal of
e.g. 11µApp is displayed as a 3.3 Vpp voltage
signal at the oscilloscope.

The EXPERT MODE has been activated
(see section 3)

The PRESET entered for the UNIVERSAL
COUNTER is displayed.

- 14 -

4. Description of the PWM 8 MODE

4.1 Switching the PWM 8 MODE

After the power-on message, the standard soft-key row is displayed, from which the MODE soft-key row of
PWM 8 can be called:

The following PWM 8 modes can be selected from the MODE soft-key row:

Soft key to call PWM 8 MODE

Start/stop of peak hold

Measure signal amplitudes

Measure the current consumption of the encoder and the
encoder voltage (and the sensor voltage)

Determine the pulse count of the encoder
(e.g. rotary encoder) and frequency display

UNIVERSAL COUNTER with frequency display

For each PWM 8 MODE the following auxiliary displays are active:
(Description see section 2.7: Explanation of the display)

• Display of the reference signal

• Encoder monitor with memory function

• Display of the counting direction

• PHA/TV display

• Assignment of the BNC sockets

After power interruption the last active mode is loaded again.

4.2 PWM 8 MODE: UNIVERSAL COUNTER with Frequency Display

The UNIVERSAL COUNTER counts the triggered edges of the incremental signals 1 and 2 of the encoder.

Note:

The function of the UNIVERSAL COUNTER is defined by the counter parameters P5 to P7. The
UNIVERSAL COUNTER can be loaded with a preset. See section 5: EXPERT MODE, parameters and
PRESET editor.

MODE UNIVERSAL COUNTER with edge evaluation (see
parameter P4)

Display of universal counter

Frequency display

Sign

- 15 -

Clearing the UNIVERSAL COUNTER:

The UNIVERSAL COUNTER is cleared by pressing the soft key

Frequency counter:

The frequency counter operates up to a frequency of 2 MHz.
The frequency is derived from the incremental signal 1.

a second time.

4.3 PWM 8 MODE: DETERMINE PULSE NUMBER with Frequency Display

The MODE DETERMINE PULSE NUMBER is intended to find the pulse count of a rotary encoder.
The parameter P5: EDGE EVALUATION is automatically set to 1-fold, the parameter
P6: COUNTING MODE to 0-1-2!

Proceeding to determine the pulse count:

First reference signal starts the pulse counter
Break of approx. 1 second (= display time of the pulse count)

Display of intermediate pulse counts

Next reference signal stops the pulse counter
Display of the pulse count

MODE DETERMINE PULSE NUMBER

Pulse number (line count)

Frequency display

Each time "DETERMINE PULSE NUMBER" is activated, the pulse counter is reset, i.e. the
next reference signal starts the counter, the next but one stops it. This function can be of use e.g. when
operating with measuring systems with distance-coded reference marks.

- 16 -

4.4 PWM 8 MODE: MEASURE U/I

The PWM MODE: MEASURE U/I the current consumption and the power supply of the encoder can be
measured.
Depending on the interface board also the sensor voltages can be measured as well.
In the subsequent electronics the sensor lines serve to tap the encoder voltage directly at the encoder at
high resistance and to feed it back to the subsequent electronics. Voltage drops on the supply lines of the
encoders are then compensated in subsequent electronics offering compensation.
TTL, HTL and 1Vpp encoders are equipped with sensor lines.
If an error is detected during measurement of the sensor voltages, a blinking error field is displayed in
MODE: MEASURE U/I.

A sensor-voltage error is displayed, if:

+ sensor smaller than 90 % of U-MSYS, or

- sensor larger than 10 % of U-MSYS

Note:

In the PWM 8 MODE: MEASURE U/I the supply lines of the encoder and the sensor lines are separated,
whereas in all other PWM 8 MODES they are connected to each other!
The current consumption of the terminating resistors (with TTL and HTL interface boards) is displayed
together with the current consumption of the encoder. I.e. even if no encoder is connected, the current

consumption of the encoder is displayed, if the terminating resistors and the encoder supply voltage
are switched on.

Error display during measurement
of the sensor voltage

- 17 -

4.4.1 Display of the PWM 8 MODE: MEASURE U/I in the Mode Window

Depending on the power supply of the encoder and of PWM 8, the MODE MEASURE U/I may be displayed
differently in the MODE window:

MODE: MEASURE U/I of encoders with sensor lines

(TTL, HTL, 1Vpp interface boards):

• and internally powered encoder (= via power supply unit) or

• externally powered encoder and parameter: P2 U-MSYS EXTERN = FLOATING

Special feature of HTL interface board:
A floating power supply of the encoder is not possible. The parameter P2 has no function.
The MODE MEASURE U/I is displayed as follows with HTL interface board:

• externally powered encoder and parameter: P2 U-MSYS EXTERN = FROM CUSTOMER

Floating power supply of the encoder with relation to the
subsequent electronics.

Current consumption of the encoder

Power supply of the encoder
(here: floating)

Sensor lines of the encoder

Special feature of HTL interface board:
The encoder is powered by the power
supply unit (= internally) without potential segregation.

The encoder is powered directly by the subsequent
electronics without potential segregation.

Current consumption of the encoder

Power supply of the encoder
(here: customer voltage)

Sensor voltages of the encoder

- 18 -

MODE: MEASURE U/I of encoders without sensor lines

(11µApp interface boards):

• und interner Meßsystemversorgung (= aus Externem Netzteil) oder

• externer Meßsystemversorgung und Parameter: P2 U-MSYS EXTERN = POTENTIALFREI

• externer Meßsystemversorgung und Parameter: P2 U-MSYS EXTERN = VON KUNDE

Floating power supply of the encoder with relation to the
subsequent electronics.

Current consumption of the encoder

Power supply of the encoder

The encoder is powered directly by the subsequent
electronics (customer) without potential segregation

Current consumption of the encoder

Note: No potential segregation between encoder
and subsequent electronics

Power supply of the encoder (= customer voltage)

- 19 -

4.5 PWM 8 MODE: MEASURE AMPLITUDES

In this mode the vertices of the amplitudes of the incremental signals 1 and 2 are measured. The result
always refers to an individual signal period. With sinusoidal encoder signals (11µApp and 1Vpp) the positive
and the negative vertices are measured versus U
and high level are measured versus 0V.

In the table below the maximum measuring ranges are listed for the different interface boards:

Interface board: 11µApp 1Vpp TTL HTL

0, with square-wave encoder signals (TTL and HTL) low

Maximum measuring range 33 µApp 1.66 Vpp low: 0 – 2.5 V

high: 2.5 – 7.5 V

If the EXPERT MODE is active (see section 5) and the 11 µApp or 1Vpp interface board used, the encoder
supply voltage can be set in the mode MEASURE AMPLITUDES:

For this purpose the standard soft-key row has been expanded by the soft key

After pressing the soft key

the encoder voltage can be set:

Soft key to switch to setting of encoder voltage

Soft key to switch back to the standard
soft-key row

Display of encoder voltage

Soft keys to set the encoder voltage

low: 0 – 7.5 V
high: 7.5 – 22.5 V

.

- 20 -

4.5.1 Measuring the Signal Amplitudes with 11µApp Interface Board:

Definitions:

I

SYM.1: Symmetry 1, ratio of positive to negative
half wave of incremental signal Ie1 (versus U

)

0

0

a

SYM.2: Symmetry 2, ratio of positive to negative
half wave of incremental signal Ie2 (versus U

)

0

ab

Calculation:

-

Result: ideal = 0

2c

´

I1 / I2: Amplitude ratio, amplitudes of incremental signals Ie1 versus Ie2

C

Calculation:

Ie1

Result: ideal = 1

C

Ie2

Result is displayed in µApp

Datum for measurement of sign. amplitude (U

Bar display of incremental signal 1.
The position of the bars stands for the symmetry
of the incremental signals.

Bar display of incremental signal 2.

Range for measurement of the signal amplitude;
here: 33 µApp (± 16.5µApp)

Numerical peak-to-peak value of the signal amplitudes of the
incremental signals 1 and 2 in µApp.

4.5.2 Measuring the Signal Amplitudes with 1Vpp Interface Board

Definitions:

SYM.A: Symmetry A, ratio of positive to negative

half wave of incremental signal A, (versus U

).

0

SYM.B: Symmetry B, ratio of positive to negative
half wave of incremental signal B, (versus U

).

0

ab

Calculation:

-

Result: ideal = 0

2c

´

A / B: Amplitude ratio, amplitudes of incremental signals Ie1 versus Ie2

C

A

Calculation:

Result: ideal = 1

C

B

U

0

a

c

t

b

)

0

c

t

b

- 21 -

Result is displayed in Vpp.

Datum for measurement of sign. amplitude (U

)

0

Bar display of incremental signal A.
The position of the bars stands for the symmetry
of the incremental signals.

Bar display of incremental signal B.

Range for measurement of the signal amplitude;
here: 1.66 Vpp

Numerical peak-to-peak value of the signal amplitudes of the
incremental signals A and B in Vpp.

4.5.3 Measuring the Signal Amplitudes with TTL or HTL Interface Boards

The following options are available in the corresponding soft-key row:

Special feature of HTL interface board:

Up to software version 05:

With HTL encoders the inverted signals may not be available depending on the encoder.
Check whether the inverted signals are available before measuring the signal amplitudes. PWM 8 cannot
recognize, whether there are inverted signals or not!
If the inverted signals are missing, incorrect values are displayed for the signal amplitudes!

From software version 05:

If the encoder does not provide inverted signals, "------" is displayed for the signal levels of
the inverted signals.

Result is displayed in V

Incremental signal 1

Incremental signal 2

High level of a signal amplitude in V

Low level of a signal amplitude in V

Terminate measurement of signal amplitudes

Switch the BNC memory for BNC sockets A to C

Switch to inverted signals

Switch terminating resistors on and off (defined load of the
square-wave signals). The highlighted option is active.

- 22 -

5. EXPERT MODE

In addition to the standard functions PWM 8 offers further possibilities in the EXPERT MODE:

• Input of a PRESET

• Possibility of adjusting the encoder voltage

• Parameter programming

5.1 Activating the EXPERT MODE

The EXPERT MODE is activated by pressing the left and the right soft key while the power-on screen is
displayed.

The message:
With parameter P4: SAVE EXPERT MODE the activation of the EXPERT MODE can be automated.
After the power-on screen the standard soft-key row is displayed:

After pressing the soft key OPT. (OPTIONS) in this soft-key row, the OPTIONS soft-key row is displayed.
From there you can switch to the EXPERT MODE.

When pressing the soft key EXPERT MODE, the following options are displayed.
Soft-key row of the EXPERT MODE:

is displayed.

Press soft key: OPT.

Press soft key: EXPERT MODE

5.2 Auxiliary Functions in the EXPERT MODE

Reduce U-MSYS:
The power supply of the encoder can be reduced to approx. 3V
(HTL interface board: 10V).

Increase U-MSYS:
The power supply of the encoder can be increased to approx. 6V (HTL interface board
19V when operating with an external 24V power supply unit).
See parameter P3: U-MSYS Limit

Activating the PRESET editors:
In the PWM 8 MODE: UNIVERSAL COUNTER a PRESET can be entered.

Activating PARAMETER programming
The PWM 8 can be configured by means of parameters.

To terminate the EXPERT MODE press the soft key ESC.

- 23 -

5.2.1 The PRESET Editor

The UNIVERSAL COUNTER (PWM 8 MODE: UNIVERSAL COUNTER) can be loaded
with a PRESET. In this case the UNIVERSAL COUNTER starts counting from this value.

After pressing the soft key:
activated.

in the soft-key row of the EXPERT MODE the PRESET editor is

PRESET editor

The highlighted figure can be edited.

Display field for the PRESET

By pressing the soft key SET P-SET the
displayed PRESET is transferred into the
UNIVERSAL COUNTER.

These soft keys serve to move the highlight to
the figure (or to the sign) to be changed.

With these soft keys the highlighted figure
(or the sign) can be edited.

- 24 -

5.2.2 The Parameters

By means of parameter programming several PWM 8 settings can be changed.

After pressing the soft key
programming is displayed. When commissioning PWM 8 the parameter default setting is as follows:

If parameters are changed, PWM 8 internally stores the changes. When the PWM 8 is switched on again,
the stored parameter values are loaded.
If parameter values have been stored that are different from the standard setting and the EXPERT MODE is
not active, the standard setting can be loaded from the Options soft-key row.
However, the parameter P1 Dialogue is not changed.

in the soft-key row of the EXPERT MODE, the menu for parameter

Current parameter setting

Terminate parameter programming

All parameters are reset to their default values (fig.:
parameter default setting)

The highlighted parameter can be changed by
pressing the soft key CHANGE

By pressing these soft keys the highlighted field can
be moved to the parameter to be edited.

With this soft key the parameter default setting can
be loaded in the Options soft-key row.

5.2.3 Parameter Overview

Parameter P1: Dialogue Language

[GERMAN, ENGLISH] Software Id.No.: 246 199 xx
[GERMAN, FRENCH,] Software Id.No.: 246 200 xx

The dialogue of PWM 8 can be switched. Possible language combinations are German/English and
German/French.

- 25 -

Parameter P2: U-MSYS EXTERN [FLOATING, FROM CUSTOMER]

Note: Parameter P2 is only effective, if the encoder is powered externally (= by a subsequent electronics,

e.g. a counter, a control or customer electronics). In this case PWM 8 can be switched to EXTernal
power supply of the encoder in the Options soft-key row:

If the encoder is powered EXTERNALLY, parameter 2 serves to choose whether the encoder supply of the
subsequent electronics is to be

• floating with relation to PWM 8 (potential segregation)

(parameter setting: FLOATING), or

• directly fed to the encoder without being changed by PWM 8

(parameter setting: FROM CUSTOMER).

Special feature of HTL interface board:
When using a HTL interface board, parameter P2 is not available. The measuring system
can only be powered with the potential of the subsequent electronics. Potential segregation is not possible!

Why is potential segregation required between PWM 8 and subsequent electronics?

Owing to different reference potentials of the encoder signals 11µApp/1Vpp (U
(0V) the signals may be shifted, which can cause counting errors in the subsequent electronics and in the
most unfavorable case result in a measuring circuit error. Potential segregation avoids signal shifts and
ensures that the encoder circuit operates correctly, when PWM 8 is switched on.

Notes on floating encoder supply from the subsequent electronics:

(Parameter P2: FLOATING)

1. To ensure trouble-free functioning of subsequent electronics with 11µApp and 1Vpp
encoder inputs.

2. In the PWM 8 the power supply of the encoder is generated by a switching regulator, providing 5.0V
(standard setting) irrespective of the encoder power supply of the subsequent electronics. If required, the
encoder voltage can be set manually.

Soft key to switch to EXTernal power supply of the enocder.
This soft key is only displayed, if an encoder voltage of a
subsequent electronics has been connected to the encoder
output of the interface board.
Shown setting: encoder is powered externally.

0) and the interface boards

For this purpose the soft keys
available.

Note on HTL interface boards:
When using a HTL interface board the standard setting of the encoder voltage is 12V, if there is no supply
voltage of the subsequent electronics at the OUT flange socket of the interface board. If there is a
voltage, PWM 8 "connects" the HTL encoder voltage to the encoder voltage of the subsequent
electronics. With HTL interface boards potential segregation is not possible.

3. The current intensity of the encoder voltage is set to 500 mA; if the terminating resistors (with TTL and
HTL interface boards) are switched on, it is 700 mA.

4. Owing to potential segregation the power consumption of the encoder supply by the subsequent
electronics is approx. 50% higher than it would be without potential segregation (due to the efficiency of
the DC/DC converter and the switching regulator). Please also note the increased voltage drop on the
encoder supply line caused by the higher current intensity!

- 26 -

in the soft-key row of the EXPERT MODE are

Notes on encoder supply directly from the subsequent electronics:

(Parameter P2: FROM CUSTOMER)

1. Trouble-free functioning of subsequent electronics with 11µApp and 1Vpp encoder interfaces cannot be
guaranteed due to signal shifts of the subsequent electronics!

2. The encoder voltage of the subsequent electronics is fed directly to the encoder without being changed
by PWM 8; it cannot be altered.

3. There is no current limitation for the encoder voltage.

4. The power consumption of the subsequent electronics for the encoder supply is only slightly higher than
that of the encoder. About 10 mA are required for the voltage monitor of the subsequent electronics.

Parameter P3: U-MSYS LIMIT

Parameter P3 defines the maximum limits for the encoder voltage. By switching off the
U-MSYS limit the encoder voltage can be set in the range of 9V ±1V.

Caution: The measured object may be destroyed by overvoltage!
Standard encoders are operated with a voltage of 5V ± 5%.

Special feature of HTL interface boards:
When using the HTL interface board, parameter P3 is not available!

[ON (6 VOLTS), OFF (9 VOLTS)]

In the EXPERT MODE the encoder voltage can only be set with the soft keys
parameter P2 is set to FLOATING.

if the

Parameter P4: EXPERT MODE

If parameter P4 is set to SAVE, the EXPERT MODE is reactivated after power interruption;
if it is set to NOT SAVE, the EXPERT MODE must be reactivated each time power is switched on.

[NOT SAVE, SAVE]

Parameter P5: EVALUATION

In parameter P5 the edge evaluation of the UNIVERSAL COUNTER (PWM 8 MODE UNIVERSAL
COUNTER) is set. It defines how many edges per signal period of incremental signal 1 and incremental
signal 2 are transferred to the UNIVERSAL COUNTER and used for measurement of the frequency.
In the PWM 8 MODE: DETERMINE PULSE NUMBER the evaluation is automatically set to 1-FOLD. The
EVALUATION is displayed next to the headline of the UNIVERSAL COUNTER:

[1-FOLD, 2-FOLD, 4-FOLD]

Display of edge evaluation of the universal counter
(here: 1-FOLD)

Parameter P6: COUNTING MODE

Parameter P6 defines the COUNTING MODE of the last digit of the UNIVERSAL COUNTER.

[0-1-2, 0-2-4, 0-5-0]

- 27 -

Parameter P7: COUNTING DIRECTION [FORWARD, BACKWARD]

P7: FORWARD = positive counting direction
P7: BACKWARD = negative counting direction

Parameter P8: COUNTER START

P8: NORMAL
UNIVERSAL COUNTER starts immediately after selection.

P8: WITH REF
The UNIVERSAL COUNTER starts with the next reference signal. The current count is frozen until the first
reference mark is reached. This "time-out" is marked by the symbol
UNIVERSAL COUNTER.

[NORMAL, WITH REF]

Symbol for "timeout":
start with the next reference signal

in the display field of the

- 28 -

6. Practical Application

6.1 Power Supply of PWM 8 and Encoder

6.1.1 Power Supply of PWM 8 and Encoder via DC-IN Socket

In general PWM 8 and the encoder can be powered from different sources. The table below contains an
overview of possible power supplies:

PWM 8 powered from

Power supply of encoder

24 V power

supply unit

only 24V power supply unit

x x1)

subsequent
electronics

directly from
subs. electronics

floating

connected (DC-IN socket)
only voltage from

subsequent electronics

x

x

1)

x

connected (encoder output)
24 V power supply unit and

voltage of subsequent

x

x

x

1)

electronics connected

1)

When using a HTL interface board, potential segregation is not possible.

As already mentioned in section 2 "General Information", PWM 8 may either be powered by the
24V power supply unit (standard set) or another dc voltage source of 10 - 30 V via the DC-IN socket. The
voltage at the DC-IN socket is referenced to the encoder voltage generated by PWM 8, i.e. if potential
segregation is required between PWM 8 and subsequent electronics, the voltage at the DC-IN socket must
be floating with relation to the subsequent electronics. The 24V power supply unit supplied with PWM 8
complies with this requirement.
If the PWM 8 is operated via the DC-IN socket, it is always powered from this current source, irrespective of
whether an encoder voltage is fed at the encoder output of the interface board or not.

PWM 8 detail

Socket for external power supply
(see section SPECIFICATIONS)

5

8

76

4

12

3

- 29 -

Basic circuit diagram of the power supply of the encoder with the power supply unit connected:

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The standard setting of the encoder power supply is 5V; when operating with HTL interface board without
subsequent electronics 12V.

Current consumption of PWM 8 when powered via DC-IN socket:

(measured with 11µApp interface board)

Voltage at DC-IN 10 V 12 V 15 V 20 V 24 V 30 V
PWM 8 current consumption 500 mA 420 mA 350 mA 270 mA 230 mA 200 mA
PWM 8 current consumption

580 mA 480 mA 400 mA 310 mA 260 mA 220 mA

with encoder (100 mA)

6.1.2 Power Supply of PWM 8 and Encoder via the Encoder Output

(OUT) of the Interface Board

PWM 8 can be integrated into the encoder circuit. For this purpose the subsequent elec-tronics must be
connected to the encoder output (OUT) of the interface board. The supply voltage for PWM 8 is taken from
the subsequent electronics. In order to reduce the power consumption of the subsequent electronics, the
background lighting of the display is auto-matically switched off!

Basic circuit diagram of the power supply of encoder and PWM 8 with subsequent electronics
connected (with interface board 11µApp, 1Vpp, TTL):

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- 30 -

Basic circuit diagram of the power supply of encoder and PWM 8 with subsequent electronics
connected (with HTL interface board):

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Current consumption of PWM 8 powered by subsequent electronics:

(measured with 11µApp interface board)

Supply voltage at interface
board OUT

PWM 8 current consumption
(without background lighting)

PWM 8 current consumption
with encoder (100 mA)

From the table can be seen that PWM 8 and encoder can only be powered by subsequent electronics
equipped with power supply units with large power reserve.

Note:

When using (long) connecting cables between the subsequent electronics and PWM 8 the voltage drop may
be considerable (current on the line to and from the encoder) which additionally reduces the voltage of the
subsequent electronics!
In the PWM 8 MODE: MEASURE AMPLITUDES the current consumption from the subsequent electronics is

approx. 0.4 A higher!

Note:

If parameter P2: U-MSYS EXTERN is set to FLOATING, potential segregation and the switching regulator in
PWM 8 can be switched off by setting P2 to FROM CUSTOMER. This reduces the power consumption from
the subsequent electronics (see section 5.2.2, PARAMETERS, Parameter P2).
When using the HTL interface board, parameter P2 is not available and potential segregation not possible!

4.5 V 4.8 V 5 V 5.2V

1.15 A 1.05 A 1.0 A 0.95 A

1.4 A 1.25 A 1.2 A 1.15 A

- 31 -

Voltage monitoring function of PWM 8 power supply:
If the voltage of the subsequent electronics falls below 4.8V, a warning is displayed:

Warning: The voltage of the subsequent electronics is too low
to power PWM 8! The encoder supply was switched off to be
on the safe side.

Press this soft key to ignore the warning.

When this warning appears, we recommend to power PWM 8 via the power supply unit.
The warning can be ignored, if desired. It is then no longer displayed (however a warning is displayed in the
INFO MODE). After power interruption the voltage monitor is reactivated.
To be on the safe side, the encoder supply is switched off.
The operator must reactivate it in the OPTIONS soft-key row. Afterwards, trouble-free functioning of PWM 8
can no longer be guaranteed and must be observed by the operator

6.1.3 PWM 8 Power Supply via DC-IN Socket and Encoder Output (OUT)

of the Interface Board

If the 24V power supply unit and the subsequent electronics are simultaneously connected, PWM 8 is always
powered by the 24V power supply unit. In the OPTIONS soft-key row the power supply of the encoder can
be selected:

Basic circuit diagram of power supply of encoder and PWM 8 with 24V power supply unit and
subsequent electronics connected (with interface board 11µApp, 1Vpp, TTL):

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The encoder can be powered INTernally (by the 24V power
supply unit) or EXTernally (by the subsequent electronics)
(current setting: INTernally)

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- 32 -

Basic circuit diagram of power supply of encoder and PWM 8 with 24V power supply unit and
subsequent electronics connected (HTL with interface board):

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Note on HTL interface boards:
If the encoder voltage of the HTL interface board is set to INTERNAL and at the same time a subsequent
electronics connected to the OUT flange socket of the interface board, the switching regulator in PWM 8 tries
to set (clamp) the encoder voltage to that of the subsequent electronics. PWM 8 is not permanently adjusted
to the encoder voltage of the subsequent electronics; it is only adjusted when the PWM 8 is switched on,
when the encoder voltage is switched on or off or the encoder supply is set to INTERNAL. If there is no
subsequent electronics connected, the switching regulator provides 12V in the standard setting. With the
HTL interface board potential segregation of voltage, subsequent electronics and encoder voltage is not
possible.

6.1.4 Voltage Monitoring Function of Encoder Supply

If the encoder supply is set to EXTERNAL and parameter P2 U-MSYS EXTERN set to FLOATING, PWM 8
checks the voltage of the subsequent electronics. In order to switch the encoder voltage to EXTERNAL the
subsequent electronics must at least provide the power-on current for potential segregation and for the
switching regulator. If this is not the case, the following message is displayed:

Note:
If parameter P2 U-MSYS EXTERN is set to FLOATING, the potential segregation and the switching regulator
in PWM 8 can be switched off by setting P2 to FROM CUSTOMER.
This reduces the power consumption from the subsequent electronics (see section 5.2.2 PARAMETERS,
Parameter P2).
When using the HTL interface board, parameter P2 is not available. Potential segregation is not possible in
this case.

This soft key serves to confirm the message.
The encoder supply is reset to INTERNAL

- 33 -

If in the OPTIONS soft-key row the encoder supply is set to EXTERNAL and parameter P2
U-MSYS EXTERN to FLOATING, PWM 8 checks the voltage of the subsequent electronics. If the voltage
drops to approx. 4.5V trouble-free functioning of potential segregation and switching regulator can no longer
be guaranteed; a warning is displayed:

When this warning is displayed, the encoder supply must be switched to INTERNAL. The warning can be
ignored, if desired.
In this case the warning is no longer displayed. (However a warning is displayed in the INFO MODE). To
be on the safe side, the encoder supply is switched off. The operator must reactivate it in the OPTIONS
soft-key row. Afterwards, trouble-free functioning of PWM 8 can no longer be guaranteed and must be
observed by the operator.

If the voltage of the subsequent electronics falls below 3V, another warning is displayed requesting the
operator to switch the encoder supply to INTERNAL:

Warning: The voltage of the subsequent electronics is too
low to power the encoder. The power supply of the encoder
has been switched off to be on the safe side.

The warning can be ignored by pressing this soft key

Press this soft key to switch the encoder supply to
INTERNAL and clear the warning

Press this soft key to switch the encoder supply
to INTERNAL

- 34 -

s

6.1.5 Block Diagram: PWM 8 Power Supply Unit

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- 35 -

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7. Calibration

In general no maintenance is required for PWM, since there are no components that are subject to wear.
However, to ensure reliable and trouble-free operation we recommend to send your PWM 8 including the
interface boards (especially 11µApp and 1Vpp) every 2 years to HEIDENHAIN, Traunreut for calibration.

Note:
Calibration of the PWM always includes a software upgrade!

- 36 -

8. Specifications

8.1 Pin Layouts of the Interface Boards

8.1.1 Pin Layout of the 11µApp Interface Board

9-pin HEIDENHAIN flange socket
at

IN flange socket of interface board

1 2 5 6 7 8 3 4 9

I1 I

+ – + – + –

9-pin HEIDENHAIN flange socket
at

OUT flange socket of interface board

1 2 5 6 7 8 3 4 9

I1 I

+ – + – + –

I

2

I

2

0

0

5 V 0 V 0 V

UP U

5 V 0 V free

UP U

N

internal shield

N

8.1.2 Pin Layout of the 1Vpp Interface Board

12-pin HEIDENHAIN flange socket
at

IN flange socket of the interface board

at OUT flange socket of the interface board

5 6 8 1 3 4 12 10 2 11 9 7

A B R 5 V 0 V 5 V 0 V free free

+ – + – + – U

The sensor lines are connected to the corresponding supply lines
(exception: PWM 8 MODE: MEASURE U/I).

U

P

N

sensor sensor

- 37 -

8.1.3 Pin Layout of the TTL Interface Board

12-pin HEIDENHAIN flange socket
at

IN flange socket of the interface board

at OUT flange socket of the interface board

1 2 3 4 5 6 7 8 9 10 12 11

+5 V

sensor

U

a2

The sensor lines are connected to the corresponding supply lines
(exception: PWM 8 MODE: MEASURE U/I).

Ua0

U

a0

Ua1

U

a1

UaS

Ua2

chassis 0 V

UN

+5 V

UP

8.1.4 Pin Layout of the HTL Interface Board

12-pin HEIDENHAIN flange socket
at

IN flange socket of the interface board
OUT flange socket of the interface board

at

1 2 3 4 5 6 7 8 9 10 12 11

a2

10-30 V

sensor

U

The sensor lines are connected to the corresponding supply lines
(exception: PWM 8 MODE: MEASURE U/I).

Ua0

a0

Ua1

U

a1

UaS

U

Ua2

chassis 0 V

UN

10-30 V

UP

8.2 Pin Layout of the Power Supply Socket on PWM 8

0 V

sensor

0 V

sensor

8-pin power supply socket DC-IN

1 2 3 4 5 6 7 8

10-30V 0V

876

543

2

1

- 38 -

8.3 Specifications of PWM 8 Base Unit

Power supply PWM 8:

• at DC-IN socket:
Power supply: 10 - 30 V
Current consumption of PWM 8
without encoder: approx. 230 mA (5.5 W) with 24 V
power-on current approx. 1 A
Current consumption with power supply unit: approx. 15 W

• at OUT flange socket of the interface board:
Power supply: 3 - 10 V (11µApp, 1Vpp, TTL)
10 - 30 V (HTL)
Current consumption of PWM 8
without encoder: approx. 1.0 A (5 W) with 5 V

Power supply of the encoder by PWM 8:

Note: Parameter P2: U-MSYS EXTERN set to FLOATING

Encoder voltage (11µApp,
standard setting: 5 V ± 0´.1 V

Encoder voltage (HTL) 10 - 19 V with 24 V power supply unit
(without voltage of subsequent electronics) 10 - 25 V with 30 V at DC-IN
standard setting: 12 V ± 0.2 V
Encoder voltage (HTL) 10 - 19 V with 24 V power supply unit
(„clamp“ to voltage of subsequent electronics) tolerance ± 0.5 V

Encoder current 500 mA max.
Encoder current
with termin. resistor switched on: 700 mA max.

Frequency display:
Measuring range of the frequency counter: 20 Hz - 2 MHz

Frequency range of the universal counter:

Maximum input frequency approx. 2 MHz

Bar display PHA, TV1, TV2:

Measuring ranges in degrees [ ° ]: 5, 10, 20, 50, autom. measuring range
standard setting: ±50°
Frequency range: 10 Hz - 10 MHz
Error PHA/TV display: 10 Hz - 10 kHz ± 0.5 degrees
(for interface board TTL, HTL) 10 kHz - 500 kHz ± 2 degrees
500 kHz - 1 MHz ± 3 degrees

Error PHA/TV display: 10 Hz - 10 kHz ± 1 degree
(for interface board 11µApp, 1Vpp) 10 kHz - 500 kHz ± 2.5 degrees

(Note: The offset adjustment of the trigger on 500 kHz - 1 MHz ± 3.5 degrees
the interface board must have been carried out!)

Temperature range:
Operating temperature 0 °C - + 40 °C
Storage temperature - 20 °C - +60 °C

1Vpp, TTL) 3 - 9 V selectable

,

- 39 -

8.4 Specifications of 11µApp Interface Board

mV

Signal amplification (Ie1, Ie2, Ie0): 300

Input amplifier:

Maximum signal current: Ie0, Ie1, Ie2: 66 µApp

Maximum frequency at encoder input:

-3 dB: approx. 300 kHz

Note:
The maximum input frequency only stands for the cutoff frequency of current/voltage converter in PWM 8
(signal source: frequency generator). In real operation with encoders the frequency highly depends on the
photocells and their capacitance, as well as on the cable lengths.

Measure current/voltage:

Measuring range current: 0 - 500 mA
Measuring range voltage: 0 - 10 V
Tolerance: ± 3 %

Measure amplitudes:

Measuring range: 2 µApp - 33.3 µApp (0.6 - 10 Vpp)
Measuring frequency: 10 Hz - 50 kHz
Tolerance:
without adjustment via software: ± 5 %
with adjustment via software: ± 3 %

Fault detection signal: Ie1 and Ie2 < 4 µApp

Encoder output:

Output signal: like input signal without U

A

m

0

8.5 Specifications of 1Vpp Interface Board

Input amplifier:

Maximum signal voltage: ± 5 Vpp

Maximum frequency at encoder input:

for encoder voltage on interface board: approx. 500 kHz
for signals on BNC sockets (- 3dB): approx. 1 MHz

Note:
Input frequencies over 1 MHz are possible; however, the tolerance of the PHA/TV display can no longer be
guaranteed!
The maximum input frequency only stands for the cutoff frequency of the voltage input of PWM 8 (signal
source: frequency generator). In real operation with encoders the frequency highly depends on the encoder
and on the cable lengths.

Measure current/voltage

Measuring range current: 0 - 500 mA
Measuring range voltage: 0 - 10 V
Tolerance: ± 3 %

- 40 -

Measure amplitudes:

Measuring range: 0.2 Vpp - 1.6 Vpp
Measuring frequency: 10 Hz - 50 kHz
Tolerance:
without adjustment via software: ± 5 %
with adjustment via software: ± 3 %

Terminating resistance: 121 Ω

Fault detection signal: A and B < 0.3 Vpp

Encoder output:

Output signal: like input signal with U

0

8.6 Specifications of TTL Interface Board

Maximum input voltage: ± 7V
Maximum input frequency: approx. 2 MHz

Note:
The maximum input frequency only stands for the cutoff frequency of the square-wave input at PWM 8
(signal source: frequency generator).

Measure current/voltage:

Measuring range current: 0 - 500 mA
Measuring range voltage: 0 - 10 V
Tolerance: ± 3 %

Measure amplitudes:

Measuring range high level: 2.5 - 7.5 V
Measuring range low level: 0 - 2.5 V
Resolution: 50 mV
Measuring frequency: 10 Hz - 200 kHz
Tolerance: ± 50 mV

Terminating resistance:

From encoder signal to U-MSYS 215 Ω
From encoder signal to GND 90,9 Ω

Special feature of TTL interface board:

Owing to the input wiring, the PHA/TV display works properly even in the case of a cable break. The missing
signals are generated internally and output at the encoder output. Cable breaks can be found in the mode
"Measure Signal Amplitudes" or by checking the encoder signals at the BNC sockets.

- 41 -

8.7 Specifications of HTL Interface Board

Maximum input voltage: 0 - 30 V
Maximum input frequency: approx. 2 MHz

Note:
The maximum input frequency only stands for the cutoff frequency of the square-wave input at PWM 8
(signal source: frequency generator).

Measure U/I:

Measuring range current: 0 - 500 mA
Measuring range voltage: 0 - 30 V
Tolerance: ± 5 %

Measure amplitudes:

Measuring range high level: 17.5 - 22.5 V
Measuring range low level: 0 - 7.5 V
Resolution: 100 mV
Measuring frequency: 10 Hz - 200 kHz
Tolerance: ± 100 mV

Terminating resistance:

From encoder signal to U-MSYS 1200 Ω
From encoder signal to GND 1200 Ω

Special feature of HTL interface board:

If the inverted are missing at the encoder output, they are generated internally and output
at the encoder output.

8.8 Specifications of Power Supply Unit

Input voltage: 100 - 240 V ac, 50 - 60 Hz
Output voltage: 24 V dc, 1.0 A
Protection grade: 1
Maximum ambient temperature: 40 °C

- 42 -

9. Description of FST 2 Leak Tester

The leak tester serves to check NC-linear encoders and rotary encoders with sinusoidal output signals and
9-pin connector for leak circuits (up to 3 MΩ) at the cabling and the photocell board.
The FST2 is switched on automatically as soon as a test piece (e.g. a linear encoder) is connected. The
current conduction through the lamp (LED) of the encoder is used for testing. When testing equipment
without a lamp (e.g. an extension cable or if the lamp is defective) the automatic test is not active. In this
case the button "Start man." must be pressed.
Encoders with integral pre-amplifiers can only be tested for leak circuits between internal shield (
external shield(
Owing to the internal resistance of the pre-amplifier (< 3 MΩ) the remaining 4 LEDs always indicate a leak
circuit when a test unit is connected.

).

) and

9.1 Explanation of the Controls and Displays

1 Input socket, 9-pin:

For connection of measuring systems with sinusoidal output signals and extension cables with 9-pin
connector.

2 Manual start button:

When testing equipment without lamp/LED or encoders with defective lamp/LED the manual start button
must be pressed to activate the FST2. The leak tester is then active as long as the button is pressed.
The manual start button also serves to test the battery. The battery voltage is in order,
if the LEDs light up in a sequence like a running light as long as the button is pressed.

3 LED display:

Leak circuits are displayed by permanently lit LEDs. The LED running light indicates that there is no leak
circuit in the test piece.
The figure on the FST2 housing indicates the location of the leak circuits.

4 Brief operating instructions

Brief operating instructions in German are printed on the rear side of the leak tester.
A sticker in English language is supplied with FST2.

- 43 -

9.2 Example for Application

Testing a rotary encoder showing the following defects (leak circuits):

1. leak circuit between

2. leak circuit between Ie1 and 0V/5V

Instruction Display Error Cause

and

Battery test:
press manual start button

Connect rotary encoder;
test starts automatically!

Test is not started.
(LEDs dark)

Press manual start button;
test is started.

Eliminate leak circuit in rotary encoder!
Connect rotary encoder;

test starts automatically.

Running light = battery o.k.

LEDs dark = battery
defective

Leak circuit is displayed between

and (1. leak circuit).

Light unit of the rotary encoder
defective or connection to light unit
interrupted.

Leak circuit is displayed between

and (1. leak circuit)

The running light stops at the
"0V/5V" LED.
The leak circuit between 0V/5V
and Ie1 is indicated by the LEDs
0V/5V and Ie1 permanently lit.
(2. leak circuit)

Eliminate 2. leak circuit in rotary encoder!
Connect rotary encoder;

test starts automatically.

Each of the 6 LEDs lights up for a
moment (running light) as long as
the rotary encoder is connected or
the manual start button pressed.

No leak circuit in the rotary
encoder!

After repair the test must be repeated until all LEDs light up like a running light.



Then there is no leak circuit in the test piece!

- 44 -

9.3 Specifications of FST 2

Sensitivity:

leak circuits ≤ 3MΩ

Test sequence

1.

2.

3. Ie0

4. Ie2

5. 0V/5V

6. Ie1

Test cycle

1 second

Power supply

9 V monobloc battery
Exchange the batteries every 2 years;
use leak-proof trademarked batteries (e. g. Alkaline)

Battery voltage

≥ 5.5 V
Below 5.5 V the tester is inoperative!

Current consumption

10 mA (in operation)
≤ 0.1 µA (quiescent current)

Cable lengths (depend on capacitance)

- 45 -

10. Description of ROD 450 Rotary Encoder

The ROD 450 serves to test counting function and interpolation of ND, VRZ, IBV EXE etc.
Moreover, it is suited to preset the oscilloscope trigger for checking the reference mark with PWM 8.

10.1 Specifications of ROD 450

Power supply

5V ± 5%/85 mA

Output signals

Incremental signals Ie1 / Ie2
7 ... 16µApp
Reference signal Ie0
2 ... 8 µA (usable component)

Line count

1000 lines/revolution
1 ref. signal/ revolution

Cable length

1m

11. Description of Connecting Cable 10-30V DC

farbig/coloured

The connecting cable serves to power the PWM externally with 24V dc (e.g. control voltage of
the machine tool).

Note: The potential of the control voltage must be separated from the encoder voltage.
measuring circuit error may occur without potential segregation.

- 46 -

A

IN

OUT

B

C

12. Measuring Setup and Tolerances of the Output Signal

Example: Checking sinusoidal output signals

Equipment required for adjustment:
a) Oscilloscope (2 channels)
b) PWM 8
c) Interface board for 11 µApp or 1 Vpp

Connection of a linear encoder to an
oscillloscope via PWM 8

- 47 -

Analog Output signals (~ 11 µApp/1 Vpp)

Prepare the oscilloscope as described below:

• Vertical deflection

– Switch channels A and B to chop mode (CHOP
– Set the deflection coefficient (Sensitivity

channels A and B to 0.5 V/DIV
(1Vpp).

• Horizontal deflection

– Set time coefficient (Time basis

• Triggering

– Trigger automatically (AUTO

– Trigger Channel A
– Trigger positive edge

)

(11µApp), 0.2 V/DIV

) to 0.5 ms/DIV.

) of the

• Calibration

– Switch the input coupling switch (AC/DC/GND) of
the channels A and B to GND
– Use the Y-position potentiometers of the channels
A and B to shift the electron rays congruently to the
center of the screen
– Switch the input coupling switch (AC/DC/GND) of

the channels A and B to DC

(fig.)

(ç or 0)

.

).

PWM 8 Settings analog signals

BNC BNC A Ue1

BNC B Ue2

[°] 25°

MODE

Measure amplitude

* Interface board 1 Vpp

(A)*

(B)*

Possible oscilloscope display x - t or x - y

- 48 -

Reference mark signal

Oscilloscope display x - t

• Change the trigger setting of the oscilloscope basic setting

as follows:

– Trigger channel A
– Manual triggering (AC or DC)
– Trigger negative edge

• Traverse the reference mark to be checked

oscillatorily (“forward“/“backward“).

• At the oscilloscope turn the trigger

potentiometer to set the trigger threshold
(LEVEL) such that the reference mark
signal is depicted as “stationary“ image
on the screen.

Note:
Schematic display of Ue1+2 on the oscilloscope.
The actual amplitude is higher than displayed.

- 49 -

PWM 8 Settings reference mark

BNC BNC A Ue0

BNC B 1+2

* Interface 1 Vss

(A)*

(A+B)*

* Old LS series:
LS 50x; LS 80x
(e.g. LS 503; LS 803)
I

0 = 5 ... 15µAss

Schematic display of I1+I2 (A+B) on the
oscilloscope.

Example:
Reference mark signal

Caution: The reference-mark edges (ref. Mark / Uo line) must not intersect outside

the tolerance range!

Note:

The quality of the output signals has an influence on the measuring accuracy of the linear and rotary
encoders.
The tolerances stated are valid for standard applications of HEIDENHAIN encoders (e.g. LS on machine tools
with measuring steps up to 1 µm).
For operation with encoders with higher accuracy (e.g. exposed, contactless encoders, angle encoders and
encoders with highly interpolated output signals) the tolerances for the output signals are smaller.
HEIDENHAIN compares precision encoders to a measuring standard after adjustment.

- 50 -

12.1 Description of the Output Signal

12.1.1 Output Signals

11 µApp

Current signals

The sinusoidal incremental signals I1 and I2 are phase-shifted by 90°; their level is approx.
11 µApp. The peaks of the ref. mark signals I0 have a usable component of ca. 5.5 µA.
The current signal of the incremental linear encoders can be interpolated and digitized either in the

subsequent electronics, e.g. HEIDENHAIN ND position display or TNC numeric control or in a separate
HEIDENHAIN EXE interpolation and digitizing electronics. For current signals the maximum cable length
between linear encoder and subsequent electronics is 30 m provided that original HEIDENHAIN cables are
used.

Incremental signals

2 sinusoidal signals I1 and I2
signal amplitude*

I1, I2: 7 to 16 µApp

Reference mark signals

1 or several peaks I0
signal amplitude with 1 kΩ load

I0 ca. 5.5 µA (usable component)

* These values apply for Up = 5 V ± 5% at the source, cable lengths up to 30 m and a
cross-section of the power supply line of 1 mm². The signal amplitude changes with
increasing scanning frequency.

Recommended input circuit of the subsequent electronics

Example:

Cable length

Max. 30 m (distributed capacitance 90 pF/m)
when using original HEIDENHAIN cables

-3dB cutoff frequency of input circuit

approx. 60 kHz

Dimensioning

Differential line receiver RC4157
C = 27 pF
R = 100 kΩ ± 2%
U0 = UB/2

UB = +15 V

- 51 -

12.1.2 Output Signals

1Vpp

Voltage signals

The sinusoidal incremental signals A and B are phase-shifted by 90°; their level is approx. 1 Vpp. The peaks
of the ref. mark signals have a usable component of ca. 0.5 V.
Encoders with a Z1 track additionally output the signals C and D. The specification of these signals is
identical to that of the incremental signals (see section 13, adapter connector).

When using original HEIDENHAIN cables, voltage signals can be transferred over a distance of 150 m to the
subsequent electronics. For this purpose a supply voltage of 5 V ± 5% or 5 V ± 10% (depending on the
encoder model) must be ensured at the encoder. Encoders that output voltage signals feature connectors for
the sensor lines which serve to measure the supply voltage at the unit. By means of appropriate controlling
means in the subsequent electronics the tolerance of the supply voltage can be observed.
Sinusoidal voltage signals can be highly interpolated.

Output signals measured with PWM 8

Incremental signals

2 sinusoidal signals A and B

signal amplitude* approx. 1Vpp

A, B: 0.6 to 1.2 Vpp
with terminating resistor Z0 = 120 Ω

Reference mark signal

1 or several peaks R

signal amplitude approx. 0.5 V

R: 0.2 to 0.8 V (usable component)
with terminating resistor Z0 = 120 Ω

* These values apply for Up = 5 V ± 5% or Up = 5 V ± 10% at the encoder.
The signal amplitude changes with increasing scanning frequency.

Recommended input circuit of the subsequent electronics

Example:

Cable length

Max. 150 m (distributed capacitance 90 pF/m)
when using original HEIDENHAIN cables

-3dB cutoff frequency of input circuit

approx. 100 kHz

Dimensioning

Differential line receiver RC4157
R1 = 10 kΩ and C1 = 220 pF

R2 = 34,8 kΩ and C2 = 10 pF
UB = ± 15V

- 52 -

12.1.3 Output Signals

TTL

TTL square-wave signals

Encoders that output TTL square-wave signals feature electronics that digitize the sinusoidal scanning
signals without interpolation.
Two TTL square-wave signals Ua1 and Ua2 that are phase-shifted by 90° are output together with the
reference pulse Ua0 gated with the incremental signals Ua1 and Ua2. Encoders with distance-coded
reference marks output several Ua0 reference pulses.
The measuring step results from the distance between two edges of the signals Ua1 and Ua2.
To each square-wave signal the integral electronics in addition outputs the corresponding inverted signal.

Incremental signals TTL square-wave signal trains Ua1, Ua2 and their inverted
signal trains

Ua2 lags Ua1 with ccw rotation (view on shaft or on encoder
flange) or when the scanning unit moves away from the ID plate ­ of the linear encoder.
Edge separation a ≥ 0.4 µs at 400 kHz scanning frequency
a ≥ 0.45 µs at 300 kHz scanning frequency
a ≥ 0.8 µs at 160 kHz scanning frequency
a ≥ 1.3 µs at 100 kHz scanning frequency
The scanning frequency depends on the encoder model.

Reference mark signal 1 square-wave pulse Ua0 and its inverted pulse
Pulse width 90° elec.
Delay time Itdl ≤ 50 ns

Fault detection signal 1 square-wave pulse
(single-ended signal: max. cable length 50m)

UaS = LOW: fault detected
UaS = HIGH: device operates properly

Ua1 and Ua2 .

Ua0

UaS

- 53 -

TTL signal level U
U

≥ 2.5 V with −IH = 20 mA

H

≤ 0.5 V with IL = 20 mA

L

Load capacity − IH ≤ 20 mA
I
C

≤ 20 mA

L

≤ 1000 pF

Load

Switching times Rise time: t+ ≤ 100 ns
Fall time: t− ≤ 100 ns

The fault detection signal

UaS indicates a malfunction, such as break of a supply line, lamp failure etc.

TTL square-wave signals can be transferred over cable lengths up to 300 m to the subsequent electronics.
For this purpose a supply voltage of 5 V ± 10% (for RAN 460: range between 10 and 30 V) must be ensured
at the linear or rotary encoder.
In the subsequent electronics TTL square-wave signals can be interpolated 100-fold max. by means of
phase-locked control loops.

Recommended input circuit of the subsequent electronics

Recommended differential line receivers

AM 26 LS 32
MC 3486
SN 75 ALS 193
SN 75 ALS 195

We recommend not to exceed the cable length related to the scanning frequency, since otherwise the
switching times resp. the edge gradient cannot be maintained.

- 54 -

UaS

12.1.4 Output Signals

HTL

HTL square-wave signals

The design of encoders with HTL square-wave signals is similar that of encoders with TTL square-wave
signals. Output signals are HTL square-wave pulse trains Ua1 and Ua2 together with the reference pulse
Ua0 that is gated with the incremental signals Ua1 and Ua2.
To each square-wave pulse train the integral electronics in addition outputs the corresponding inverted
signal (not with ERN 1030). The outputs of encoder with HTL square-wave signals are short-circuit proof at
room temperature.

Incremental signals: HTL square-wave pulse trains Ua1 and Ua2 and their inverted
pulse trains

Ua2 lags Ua1 with ccw rotation (view on shaft or encoder flange).
Edge separation a ≥ 0.45 µs at 300 kHz scanning frequency
a ≥ 0.8 µs at 160 kHz scanning frequency

The scanning frequency depends on the encoder model and can be seen from the specifications.
Ref. mark signal 1 square-wave pulse Ua0 and its inverted pulse
ERN 1030: no

Pulse width 90° elec.
Delay time Itdl ≤ 50 ns for gated ref. pulse

Fault detection signal 1 square-wave pulse

(short circuit not permissible after Up)
ERN 1030: no fault detection signal

Signal level HTL U
U
if supply voltage is +24 V, without cable

Load capacity − IH ≤ 200 mA (not true for
I
C
Switching times Rise time: t+ ≤ 200 ns
Fall time: t− ≤ 200 ns

UaS = LOW: fault detected
UaS = HIGH: encoder operates properly

≥ 21 V with −IH = 20 mA

H

≤ 2.8 V with IL = 20 mA

L

≤ 200 mA

L

Load

Ua1 and Ua2 (ERN 1030: no inverted pulse trains).

Ua0

UaS

≤ 1000 pF

Ua0

UaS )

- 55 -

HTL square-wave signals can be transferred over cable lengths up to 300 m (ERN 1030: 100 m) to the
subsequent electronics (PLC etc.).

We recommend not to exceed the cable length related to the scanning frequency and to the power supply,
since otherwise the switching times resp. the edge gradient cannot be maintained.
In the subsequent electronics HTL square-wave signals can be interpolated 100-fold max. by means of
phase-locked control loops.

If the cable is longer than 50 m, the 0V signal lines
must be connected to 0V of the subsequent
electronics to increase noise immunity.

The permissible cable length depends on the scanning frequency and on the power supply.

- 56 -

13. Adapter Connectors

13.1 Overview of the Adapter Connectors

Meßsystem 1Vss

15pol. (Lage)

Encoder 1Vpp

Encoder TTL

15pin (position)

Meßsystem TTL

15pin (position)

Kabel, Adapter-

Adapter connector

Id.-Nr. 310 199 02

2,0m

15pol. (Lage)

Kabel, Adapter-

Adapter connector

Id.-Nr. 310 199 02

2,0m

Meßsystem 11µAss

Control

Steuerung

TNC 410/426/430

Meßsystem 1Vss u. Z1

(25pol.)

Drehzahl

Encoder 1Vpp a. Z1

(25pin)

Encoder 11µApp

15pin (position)

15pol. (Lage)

Kabel, Adapter-

Adapter connector

Id.-Nr. 310 198 02

oder

Id.-Nr. 289 439 02

2,0m

Kabel, Verbindungs-

Connecting cable

1:1 1m

Id.-Nr. 345 723-01

Speed

Kabel, Adapter- 25pol. (Zn/Z1 Spur-Test)

Adapter connector 25pin (Track Test Z1)

Id.-Nr. 324 556 01

Siehe auch Kap. 13.3

See also section 13.3

OUT

IN

PWM 8

1Vss

Stecker, Adapter-

Adapter connector

15/12pol.

Id.-Nr. 324 555 01

ROD

Encoder 1Vpp

ohne Z1-Spur

Meßsystem 1Vss

oder

ROD

oder

Stecker, Adapter-

Meßsystem TTL

Adapter connector

Encoder TTL

OUT

IN

PWM 8

TTL

15/12pol.

Id.-Nr. 324 555 01

OUT

IN

PWM 8

11µA

Stecker, Adapter-

Adapter connector

15-/9pol.

Id.-Nr. 294 894 01

OUT

IN

PWM 8

1Vss

Meßsystem 1Vss u. Z1

Encoder 1Vpp / Z1

RON 3350, ERN 1387

ROD

Encoder 11µApp

Meßsystem 11µAss

oder

LS / LB

LS / LB

LS / LB

Wichtig bei Drehzahlmeßsystem (1 Vss und Z1 25pol.)

- neue 1 Vss-Interfaceplatine Id.Nr. 323 077 01 !

- PWM 8-Software 05 und höher

- bei Messung Z1-Spur Abschluß in PWM 8 ausschalten !

Important for speed encoder (1 Vpp and Z1, 25pin)

- new 1 Vpp interface board Id.No. 323 077 01 !

- PWM 8 software 05 and higher

- Switch terminating resistor off on PWM 8, when

measuring the Z1-track!

- 57-

g

g

nals the adapter

A

IN

OUT

B

C

A

IN

OUT

B

C

the TTL output si

For inspectin

cable Id.No. 331 693-xx is required.

- 58-

Units with D-Sub connector:

LIF 17 MT 1271

LIP 47 MT 2571

LIP 57 ST 1271

LIDA 17 ST 1277

LIDA 42 ST 3078

LIDA 47

~ 11 µApp

APE

12-pin

PIN 9 5 V *

323 466-..

13.2 Adapter connector for exposed linear encoders (TTL output signals)

324 282-01

~ 11 µApp

B

A

9-pin

IN

• NOTE: The above adapter cables convert the output signals from TTL to 11 µApp.

No feed-through mode possible!

Units with APE:

LIF 12

LIF 17

LIP 37

LIP 47

LIP 57

TOP

13.3 Adapter-connector for ERN 1387

Test adapter set for rotary encoders with analog commutating signals

(e.g. ERN 1387 with incremental track Zn and commutating track Z1)

Testing the ERN 1387 without subsequent electronics!

Adapter set Id.No. 341 338-01

Note: If the ERN is tested without subsequent electronics, the terminating resistor on the PWM 8

must be switched off.
See PWM 8 Operating Instructions Id.No. 312 737 91 page 13 softkey options.
The terminating resistors are integrated in the D-sub connector Id.No. 341 339 01!

CAUTION

: If the ERN is to be tested without subsequent electronics (NC), the adapter cable

Id.No. 341 340 01 (see graphic) must always be used!
The 17-pin right-angle flange socket on the servo drive may have different!

- 59-

14. Pin Layouts of Standard HEIDENHAIN Cables

11µApp

9-pin
HEIDENHAIN connector

9-pin
flange socket

1 2 3 4 5 6 7 8 9 housing

I1 I

+

5V

1

−

Up

+

0V

UN

I2 I

I

2

−

I

0

+

internal shield external shield

0

−

Green Yellow Brown White Blue Red Gray Pink White/brown

9-pin D-sub-connector
for HEIDENHAIN IK 121A counter card

1 2 3 4 5 6 7 8 9 housing

I1 0V

UN

−

I2 internal shield I0 I

−

−

5V

1

+ + +

Up

I2 I

external shield

0

Yellow White Red White/brown Pink Green Brown Blue Gray

15-pin D-sub-connector
for HEIDENHAIN contouring control TNC 410, TNC 426, TNC 430

19210354

687

13

14

15

11

12

1 2 3 4 5 6 7 10 12 housing

5V

Up

0V

UN

I1 I

internal shield I2 I

1

I

2

I

0

external shield

0

+

−

+

−

+

−

Brown White Green Yellow White/brown Blue Red Gray Pink

TTL

12-pin HEIDENHAIN-coupling

9

1

8

7

2

12

10

3

6

4

5

11

12-pin HEIDENHAIN-connector

9

8

1

12

2

7

10

3

6

45

11

5 6 8 1 3 4 12 10 2 11 9 7 / housing

1 9 3 11 14 7 4 2 12 10 / 13 15

Ua1

Ua1

Ua2

Ua2

Brown Green Gray Pink Red

Ua0

Ua0

Black

5V
Up

Brown/

green

IEC742 EN 50178

0V

UN

White/

green

Sensor line internally connected to power supply line. Shield on housing.

1) Switchover TTL/11µApp

15pin D-sub-connector (male) at LIF 171

5V

sensor

0V

sensor

192103 54

frei

UaS

687

13

14

15

11

12

1)

Blue White / Violet Yellow

external

shield

- 60-

1 Vpp

8

7

6

12-pin
HEIDENHAIN­connector

UN

0V

Sensor

5V

vacant external

Up

7

6

12-pin HEIDENHAIN­flange socket or
coupling

9

1

2

12

10

3

4

5

11

1 2 3 4 5 6 7 8 9 10 11 12 / housing

B 5V

R R A A / B vacant 0V

Sensor

8

12

9

1

10

3

45

11

shield

2

−

+

−

pink blue red black brown green violet gray / white/

+

−

+

green

white brown/

green

yellow

Sensor line internally connected to power supply line. Shield on housing.

15-pin D-sub-connector (female)
for HEIDENHAIN contouring control TNC 410, TNC 426, TNC 430

15-pin D-sub-connector (male)
for HEIDENHAIN IK 121 V Counter Card for PCs

192103 54

11

12

687

13

14

15

3 4 6 7 10 12 1 2 9 11 5/8/

1 9 3 11 14 7 4 2 12 10 5/6/

A B R 5V

Up

+ − +

brown green gray pink red black brown/

+

−

−

green

0V

UN

5V

Sensor

0V

Sensor

white/
green

blue white / violet yellow

13/15

8/15

vacant vacant/

14 / housing

13 / external

vacant

do not use

Sensor line internally connected to power supply line. Shield on housing.

HTL

12-pin HEIDENHAIN­flange socket or -coupling

9

8

1

2

3

7

12

10

6

4

5

11

1 2 3 4 5 6 7 8 9 10 11 12 / housing

Ua2

10 to

30 V

Ua0

Ua0

Sensor

pink blue red black brown green violet gray / white/

Ua1

Ua1 UaS

Ua2 vacant 0V

(UN)

green

0V

Sensor

10 to

30 V

(Up)

white brown/

green

vacant external

yellow

shield

shield

Sensor line internally connected to power supply line. Shield on housing.
ROD 1030/ERN 1030 without inverse signals

Ua1, Ua2 and Ua0 .

- 61-

TTL **

12-pin flange socket
(model: Binder)

A B C D E F G H J K L M / housing

Ua2

5V *

Sensor

Ua0

Ua0

Ua1

Ua1 UaS

12-pin connector
(straight or offset)
(model: Binder)

Ua2 vacant 0V

(UN)

0V

Sensor

5V

vacant external

(Up)

shield

pink blue red black brown green violet gray / white/

green

white brown/

green

yellow

Sensor line internally connected to power supply line. Shield on housing.
* ERN 460 has a power supply of 10 to 30 V.

** Adapter cable on request

HTL

12-pin flange socket
(model: Binder)

A B C D E F G H J K L M / housing

Ua2

pink blue red black brown green violet gray / white/

10 to

30 V

Sensor

Ua0

Ua0

Ua1

Ua1 UaS

Sensor line internally connected to power supply line. Shield on housing.

12-pin connector
(straight or offset)
(model: Binder)

Ua2 vacant 0V

(UN)

green

0V

Sensor

white brown/

10 to

30 V

(Up)

green

vacant external

shield

yellow

1 Vpp

12-pin flange socket
(model: Binder)

A B C D E F G H J K L M / housing

B 5V

Sensor

−

pink blue red black brown green violet gray / white/

+

R R A A vacant B vacant 0V

−

+

−

12-pin connector
(straight or offset)
(model: Binder)

(UN)

+

green

0V

Sensor

white brown/

5V

vacant external

(Up)

green

yellow

shield

Sensor line internally connected to power supply line. Shield on housing.

- 62-

TTL EXE Output Signals

EXE 604C

192103 54

15-pin D-Sub connector

(colors apply for HEIDENHAIN cable)

1 2 3 4 5 6 7 8 9 10 11 12

687

13

14

11

15

12

Ua1

Ua1

brown green grey pink blue red black violet brown/

Ua2

Ua2

5V
Sensor

Ua0

Ua0 UaS

5V
Up

0V

n.c. 0V

Sensor

white / white/

green

Sensor line internally connected to power supply line. Shield on housing.

EXE 605S
12-pin coupling (Souriau)
EXE 604C
12-pin connector (Souriau)

(colors apply for HEIDENHAIN cable)

1 2 3 4 5 6 7 8 9 10 11 12
Ua1

Ua1

Ua2

Ua2

5V
Sensor

Ua0

Ua0 UaS

brown green grey pink blue red black violet brown/

1

2

5

3

4

8

7

9

6

12

10

11

5V
Up

0V
Sensor

3

6

10

Shield 0V

white / white/

green

UN

1

4

7

11

UN

green

2

5

8

9

12

green

- 63-

15. Description of the interface board, 1 Vpp, absolute
(with Zn/Z1-track; EnDat/SSI; SSI-programmable)

15.1 General information

This 1Vpp interface board has been designed for testing measuring systems with Zn/Z1 1Vpp output signals,
EnDat/SSI and programmable SSI interfaces.
The interface board features 17-pin HEIDENHAIN flange sockets.
The measuring system can be selected via the parameter P9 in the EXPERT MODE of PWM8.

15.1.1 1 Vpp measuring systems with Zn/Z1 track

e.g. ERN 1185, ERN 138x (with commutating track)

The interface board permits switching between the two output-signal tracks (AB and CD). The encoder signals
can be fed through the PWM8 to an oscilloscope. For the tracks AB and CD switchable terminating resistors
are provided on the interface board. The remaining functions of PWM8 can also be used for the CD track
provided that the lower cutoff frequencies are observed. (Commutating track CD = 1 signal period per
revolution!)

Note:

Do not exceed the mechanical shaft speed!

- 64 -

The interface board replaces the 1Vpp Zn/Z1 adapter Id.No. 324566-01 (part of the cable adapter set for
PWM8, Id.No. 341338-01). All encoder supply types of PWM8 are possible (INTERNAL, EXTERNAL,
EXTERNAL FROM CUSTOMER). An adapter cable is required to connect 1Vpp measuring systems with
Zn/Z1 track with different wirings to this interface board; by means of this cable the encoder signals can be
tapped directly at the measuring system. (see section: HEIDENHAIN output cable with 14-pin PCB connector)

Note:
The reference pulse of this measuring system is derived from the AB track. The CD track is not directly
connected to the reference signal!

15.1.2 1 Vpp measuring systems with EnDat interface

With this setting of the interface board, 1Vpp measuring systems with EnDat or SSI interface can be operated
via PWM8 in feed-through mode. All encoder supply types of PWM8 are possible: INTERNAL, EXTERNAL,
EXTERNAL FROM CUSTOMER. The encoder is powered with 5V (selectable in the EXPERT MODE). The
analog 1Vpp signals can be fed through the PWM8 to an oscilloscope. The remaining functions of PWM8 can
be used for the analog 1Vpp signals. Please consider that EnDat encoders do not have a reference pulse.
With these encoders the internal counter of PWM8 cannot be started by reference pulse; display of the
reference pulse is not possible!
The digital signals of the EnDat interface can also be switched to the BNC sockets. Further evaluations of

the EnDat or SSI signals can not be made with this interface board.

Note:

If digital and analog signals are switched to the BNC sockets simultaneously, crosstalking of the digital signals
to the analog signals is to be expected. The higher the band width of the oscilloscope connected, the more
obviously the crosstalking effect can be seen.
With the encoder output (OUT) of the interface board this effect does not occur.

15.1.3 1 Vpp measuring systems with SSI interface and 5V supply voltage

Same functions as 1 Vpp measuring systems with EnDat interface
(see section: 1 Vpp measuring systems with EnDat interface)

- 65 -

15.1.4 1 Vpp measuring systems with SSI interface and HTL supply voltage

For the software version 10 applies:

Same functions as 1 Vpp measuring systems with EnDat interface (see section: 1 Vpp measuring systems
with EnDat interface) To be able to set the power supply for HTL encoders, these encoders must be
operated with the parameter setting P9 = "PROG. SSI". The additional parameter functions of the
programmable SSI interface must not be used for these encoders! Switching to HTL encoder supply is
described in the section Switching the encoder supply to HTL.
The sensor connection can be set in the parameter P10. Recommended setting: "AUTO" (see also section

Parameter P10 "Sensor connection" with programmable SSI encoders).

Caution:

To avoid malfunctions or destruction of the encoder the offered programming features must not be
used for this HTL application!

As of the software version 11 applies:

Same functions as 1Vpp measuring systems with EnDat interface (see section 1Vpp measuring systems
with EnDat interface).
These measuring systems are operated with the parameter setting P9 = "SSI/EnDat". The additional
functions of the programmable SSI interface are not available with these measuring systems and therefore
not offered by the software. Switching to HTL encoder supply is described in the section Switching the

encoder supply to HTL.

15.1.5 1 Vpp measuring systems with programmable SSI interface

Same functions as 1Vpp measuring systems with EnDat interface (see section 1Vpp measuring systems
with EnDat interface).

In addition these measuring systems offer the following characteristic features:

1. The following functions can be programmed:

PIN 2 (IN):

PIN 5 (IN): Preset 1 – any desired position determined via the programming software

PIN 6 (IN): Preset 2 – any desired position determined via the programming software

2. Additional serial interface instead of the sensor lines for further programming functions.

3. HTL encoder supply (10V-30V)

4. General encoder interference signal at PIN3.

The PWM displays this interference signal as "/UaS2" in the LC display instead of the "REF display"
(possible as of interface board Id.No. 312186-01 with hardware index b). The "/UaS2" is not the same as the
"/UaS" interference signal. The "/UaS2" signal is generated on the interface board, the "/UaS" signal by the
encoder and fed to the PWM via PIN3.

In the setting "programmable SSI" the interface board is prepared for the additional functions. In order to
enable the interface board to execute these functions, the related menu must be activated through a key
combination.
For reasons of safety the HTL supply for the programmable SSI measuring systems must be switched on by
the operator in the additional menu. If HTL supply is activated, the sensor lines of the measuring system are
connected to the subsequent electronics through the PWM8. Thus, the additional serial interface is
operative.
If the measuring system is to be powered from an external power source (= U_MSYS EXT) with the HTL
supply switched on, the parameter "P2 = U_MSYS EXTERN“ must be set to "FROM CUSTOMER“. The
PWM8 automatically activates the parameter P2. The parameter option
"P2 = FLOATING" is not possible!

Changing the direction of rotation by applying Up

can be loaded by applying Up for > 1ms.

can be loaded by applying Up for > 1ms.

- 66 -

16 Items supplied

16.1 Hardware

Interface board ~1 Vpp with Zn/Z1, EnDat, SSI

16.2 Adapter Cables overview

Id.No. see section

Adapter kit 1

Adapter Zn/Z1 IN
Adapter Zn/Z1 OUT

Id.No. 312186-xx

349312-01
349312-02

18.9.1

18.9.1

Adapter kit 2

Adapter EnDat/SSI IN
Adapter EnDat/SSI OUT

Adapter cables

Adapter cable with 12-pin PCB connector
for 1Vpp encoders with EnDat or SSI (Pos.Enc.EnDat)
Adapter cable with 14-pin PCB connector
for 1Vpp encoders with Zn/Z1 track (Pos.Enc.EnDat)

Adapter cable, 17/17-pin, PWM to motor (Pos.Enc.EnDat) 323897-xx
Adapter cable to IK115 interface board
5V voltage controller for cable lengths > 6m (Pos.Enc.EnDat);

HEIDENHAIN
5V voltage controller for cable lengths > 6m (Mot.Enc.EnDat);
SIEMENS
Adapter cable, 17/17-pin, PWM to motor (Mot.Enc.EnDat)

Adapter cable, 17/15-pin, PWM to subsequent electronics
(Mot.Enc.EnDat)
Adapter cable, 17/25-pin, PWM to subsequent electronics
(Mot.Enc.1Vss)
Adapter cable, 17/25-pin, PWM to subsequent electronics
(Mot.Enc.EnDat)
Adapter cable, 17/17-pin, PWM to motor (Pos.Enc.EnDat)

Note:

For connection via the flange socket of the motor encoder always use the adapter kit (1 or 2)!
(SIEMENS pin layout adapted to HEIDENHAIN pin layout)

349312-03
349312-04

349839-xx

330980-xx

324544-xx 18.12

370225-01 16.4

370224-01 16.5

340302-xx 18.13
332115-xx 18.14

289440-xx 18.15

336376-xx 18.16

336847-xx 18.17

18.9.2

18.9.2

18.10.1

18.10.2

18.11

- 67 -

16.3 Incremental Zn/Z1

- 68 -

16.4 Absolute EnDat/SSI

- 69 -

16.5 Absolute EnDat/SSI motor encoder

- 70 -

17 Software Description

17.1 Required software version

To operate the interface board Id.No. 312186-02 the PWM8 software version 246199-10 (246200.10) or
higher is required.

17.2 Selecting the encoders via soft keys

17.2.1 Via the selection screen

When the PWM8 is switched on a selection screen is displayed in which the measuring system to be tested
can be chosen.
The selected measuring system is highlighted in the soft-key row:

Optional field to display important points

The selected measuring system is highlighted

After selecting a measuring system, press ESC to continue.

Press ESC to exit this screen. The display switches to the PWM8 operating mode. The selected measuring
system is displayed in the PWM8 mode INFO.

Measuring systems that can be selected with this interface board:

1. 1Vpp encoder with Zn/Z1 incremental track AB selected

2. 1Vpp encoder with Zn/Z1 incremental track CD selected

3. 1Vpp encoder with EnDat or SSI interface

4. 1Vpp encoder with programmable SSI interface

17.2.2 Via parameter P9 in the EXPERT MODE

Changing the parameters of PWM8:

The parameters of the PWM8 can only be edited in the EXPERT MODE.
This mode is activated by simultaneously pressing the left and the right soft key while the power-on message
of PWM8 is being displayed.

As soon as this mode has been started
of PWM8.
The EXPERT MODE function can be stored in non-volatile memory by means of the parameter P4 STORE
EXPERT MODE (see PWM8 Operating Instructions, Section EXPERT MODE).

is displayed together with the power-on message

- 71 -

Select parameter P9 using the arrow keys; press CHANGE to
switch to the menu for encoder selection.
In this example:
1 Vpp encoder with EnDat interface

By pressing ESC in the menu for selecting the encoder input, the selected encoder is confirmed and the
PWM8 parameter list exited.

17.2.3 Switching the AB and CD tracks for 1Vpp encoders with Zn/Z1

Note:
As of software version 11:

With these measuring systems the track signals AB and CD can be switched in the INFO soft-key row
Parameter programming is not required.

Possibility of switching between AB incremental track and CD
commutating track in the INFO mode

- 72 -

17.3 1 Vpp measuring systems with programmable SSI interface

17.3.1 Activating the menu for additional functions

A special menu needs to be activated to use the additional functions. For this purpose the encoder input must
be set to "PROG. SSI" by means of the parameter P9.

To activate the menu for the additional functions, now (P9 = MSYS input: PROG.SSI) press the three soft
keys on the left simultaneously.
Then the following options are available:

The menu can only be activated, if the encoder input is set to
"PROG. SSI".

The additional parameters are only displayed, if the encoder
input is set to "PROG. SSI".

The encoder supply voltage Up can be applied to PIN2 (IN).

An Up pulse can be applied to PIN5 (IN) for more than 1 ms.

An Up pulse can be applied to PIN6 (IN) for more than 1 ms.

Up can be changed from 5V to HTL (10 – 30V).

Press the ESC soft key to exit the menu of the additional functions.

- 73 -

17.3.2 Switching the encoder supply to HTL

The encoder supply voltage can be switched to HTL (10 – 30V), if the soft key "CHANGE" is pressed while
the parameter "V+ [Up]" is selected (highlighted).
For safety's sake a warning is displayed which needs to be confirmed by pressing the ESC soft key.

Note:

After a power interruption (PWM8 switched off) U_MSYS is always set to 5V; it must be set to HTL again by
the operator, if required.

After confirming this safety precaution with ESC, the internal PWM8 parameter settings are displayed.

Safety precaution!
The encoder supply voltage has been set to HTL (10 – 30V).
TTL (5V) measuring systems connected by accident would
be destroyed in this operating mode.

HTL power supply is active.

With HTL the encoders can only be powered externally
"FROM CUSTOMER".

The sensor connection at the encoder input and at the
encoder output of the interface board is opened such that the
additional serial interface can be used.

If this parameter list is exited by pressing the ESC soft key, the parameter list for P1 to P10 is displayed again.
As it is the rule with the HTL interface board, the parameters P2 and P3 are not available.

- 74 -

g

8

e

g

d

d

g

g

17.3.3 Parameter P10 "sensor connection" with programmable SSI encoders

When HTL encoder supply is activated when operating with 1Vpp encoders with programmable
SSI interface, additionally the parameter "P10=SENSOR UMSYS" is available.
By means of the parameter P10 the operator can set the sensor connection at the encoder input
and at the encoder output.

There are three different settings for the sensor connection:

auto The PWM8 itself is responsible for the sensor connections, dependin

MODE. In the PWM8 MODE "MEASURE U/I" the sensor connection is opened at the encod
input such that the sensor voltages can be measured. At the encoder output the sensor
connection is maintained; thus the voltage of the subsequent electronics is fed to the PWM8
on four lines. Owin
In all other PWM8 MODEs there is a sensor connection at the encoder input and at the
encoder output (reduced voltage on the power supply lines owing to double conductor cross
section).
If the encoder is powered "EXTERNAL FROM CUSTOMER" (parameter P2), the sensor
connections are opened at the encoder input and at the encoder output. The subsequent
electronics can readjust the encoder supply voltage. if this feature is supported by the
subsequent electronics.

open The sensor connections at the encoder input and at the encoder output of the interface boar

are open, i.e. the sensor lines are simply fed through PWM8.
This setting is required for 1Vpp encoders with programmable SSI interface and HTL power
supply (additional serial interface via the sensor lines). Under these circumstances (P9 =
„PROG SSI“) the PWM8 automatically set the parameter P10 to "OPEN".

connected The sensor lines at the encoder input and at the encoder output of the interface board are

connected, i.e. the encoder is also powered via the sensor lines (the volta
to double conductor cross section).

Display of interfering signal: A and B < 0.3 Vpp
Response time of the interface board t1 approx. 5 µs
Response time of the PWM8 display t2 > 1.2 µs

to the double conductor cross section the voltage on the lines is reduce

The parameters P2 and P3 are not available with HTL
power supply.

If HTL power supply is active, the parameter P10 serves to
set the sensor connection at the encoder input and at the
encoder output of the interface board.

on the selected PWM

e is reduced owin

- 75 -

18 Specifications: Interface Board 1Vpp, absolute

18.1 Encoder input (IN)

Signal voltage: 5 Vpp max.
Input frequency for 1Vpp signals: approx. 500 kHz

Note:

Higher input frequencies (up to 1 MHz) are possible; in this case the accuracy tolerance of the PHA/TV
display can not be guaranteed any more!
The maximum input frequency only represents the cutoff frequency of the voltage input of the PWM8 input
(signal source: frequency generator). In real operation with encoders the frequency response highly depends
on the encoder connected and on the length of the cable.

18.2 Encoder output (OUT)

Output signal: like input signal without U0

18.3 Signal assignment of the BNC sockets

Max. frequency for the analog signals at the BNC
sockets:

1Vpp encoder, track AB

Signals on BNC socket A A, R, A
Signals on BNC socket B B, A+B, B
Signals on BNC socket C R, Up,/UaS EXE

1Vpp encoder, track CD

Signals on BNC socket A C, R, C
Signals on BNC socket B D, C+D, D
Signals on BNC socket C R, Up /UaS EXE

1Vpp encoder with EnDat or SSI interface

Signals on BNC socket A A, CLK+, DAT­Signals on BNC socket B B, CLK-, DAT+
Signals on BNC socket C /UaS, Up, Up

approx. 1 MHz (3dB)

18.4 Measuring encoder current/voltage

Measuring range for current: 0 - 500 mA
Measuring range for voltage: 0 - 30 V
Tolerance:

± 5 %

18.5 Measuring signal amplitudes

Measuring range: 0.2 Vpp – 1.6 Vpp
Measuring frequency: 10 Hz - 50 kHz
Tolerance without adjustment by software:
Tolerance with adjustment by software:

± 5 %
± 3 %

18.6 Display of /UaS interference signal

Track signal A and track signal B: < 0.3 Vpp

18.7 Terminating resistors

Terminating resistor: tracks A, B
Terminating resistor: tracks C, D
Terminating resistor: data, clock not possible!

121Ω
1kΩ

- 76 -

18.8 Pin layouts of drive encoders and absolute encoders

18.8.1 1 Vpp measuring system with Zn/Z1 track

17-pin HEIDENHAIN flange socket
Interface board flange socket:
Interface board flange socket:

15 16 12 13 3 2 7 10 1 4

IN
OUT

PCB connector
on encoder

:

6b 2a 3b 5a 4b 4a 1b 5b 7a 3a

A B R

+ – + – + –

Green /

Black

Yellow /

Black

Blue /
Black

Red /
Black

Red

Black

5 V

UP

Brown /

Green

0 V

UN

White /

Green

5 V

Sensor

Sensor

Blue White

11 14 17 9 8 5 6

- 7b 1a 2b 6a - -

C D Temperature Internal

shield

-

+ – + – + –

Gray

Pink Yellow Violet Green Brown

18.8.2 1 Vpp measuring system with EnDat interface

17-pin HEIDENHAIN flange socket
Interface board flange socket:

IN

Interface board flange socket: OUT

15 16 12 13 14 17 8 9 7 10

2a 5b 4a 3b 6b 1a 2b 5a 1b 4b

A B

+ – + –

Green /

Black

Yellow /

Black

Blue /
Black

Red /
Black

11 1 4 3 2 5 6

- 6a 3a - - - -

Internal

shield

-

5 V

Sensor

5 V

Sensor

Blue White Red Black Green Brown

Serial EnDat output signals

Being a bi-directional interface, the EnDat interface (Encoder Data) of the absolute encoders can output
absolute position values as well as request or update information stored in the encoder. Owing to serial
data transfer, 4 signal lines are sufficient. The data transfer mode (position values or parameters) is
selected via MODE commands which the encoder receives from the subsequent electronics. The data
transfer is synchronized with the CLOCK signal given by the subsequent electronics.

PCB connector
on encoder

:

+DATA -DATA

Gray

Pink

+CLOCK -CLOCK

Violet Yellow

5 V
UP

Brown /

Green

n.c.

n.c.

n.c.

n.c.

White /

Green

0 V

0 V
UN

- 77 -

Serial SSI output signals

With transfer of the absolute position information, the absolute position value is transferred synchronously to
a CLOCK given by the control, starting with the most significant bit (MSB first).
According to the SSI standard the data word length is 13 bits for single-turn encoders and 25 bit for multi-turn
encoders.

18.8.3 1 Vpp measuring system with programmed SSI interface

17-pin HEIDENHAIN flange socket
Interface board flange socket:

IN

Interface board flange socket: OUT

15 16 12 13 14 17 8 9 7 10

A B

+ – + –

Green /

Black

Yellow /

Black

Blue /
Black

Red /
Black

Internal

11 1 4 3 2 5 6

shield

-

RxD

Blue White Red Black Green Brown

TxD /Uas1)

1): PWM8 displays the encoder error signal as /UaS2 (see also section: 1 Vpp encoders with programmed
SSI interface)

Programmable SSI 09/10 encoders

HEIDENHAIN offers programmable versions of the multi-turn encoders ROQ 425, EQN 425 and single-turn
encoders ROC 413, ECN 413. The following parameters and functions must be programmed via software:

• Single-turn resolution up to 8192 absolute positions per revolution. This allows for e.g. the adaptation

to any screw pitch.

• Multi-turn resolution up to 4096 distinguishable revolutions, e.g. for the adaptation to any screw pitch.

• Direction of rotation for ascending position values.

• Output format of the position value: Gray code or dual code.

• Data format: synchronous-serial right-aligned or 25-bit partitioned data format (SSI).

• Offset and preset values for zero rest or compensation.

Some of these functions can also be activated by means of connecting elements:

• Direction of rotation for ascending position values.

• Setting the preset value defined by software programming.

Moreover, the HEIDENHAIN programmable multi-turn encoders feature a diagnosis function providing
information on the current operating status. The PLC can evaluate an interference signal output on a separate
line. Thus, the standstill time of the system can be reduced.

Details: see Operating Instructions
Software for programmable SSI encoders Id.No. 332434-10

PCB connector
on encoder

:

+DATA -DATA

Gray

Dir. of

rotation

Pink

Preset1 Preset2

+CLOCK -CLOCK

Violet Yellow

10V-30V

UP

Brown /

Green

0 V
UN

White /

Green

- 78 -

18.9 Adapter kit for non-HEIDENHAIN wiring

To adapt PWM8 interface boards with Pos.Enc. wiring (position encoder) to motor encoder wirings
Mot.Enc.1Vpp and Mot.Enc.EnDat (mot

or encoder 1Vpp / EnDat)

18.9.1 Adapter kit 1 (Zn/Z1) for operation with Siemens and JH drives with

HEIDENHAIN Zn/Z1 encoders and non-HEIDENHAIN wiring

Kit 1: Adapter Zn/Z1 IN: Id.No. 349312-01 for flange socket IN of interface board

PWM8 side (Pos.Enc.1Vpp) Signal Color Drive side (Mot.Enc.1Vpp)

Flange socket 17-pin, male Flange socket 17-pin,

knurled coupling ring

PIN 1 Up sensor Blue PIN 16
PIN 2 R- Black PIN 13
PIN 3 R+ Red PIN 3
PIN 4 0V sensor White PIN 15
PIN 5 Temp.+ Green PIN 8
PIN 6 Temp.- Brown PIN 9
PIN 7 Up Brown/green PIN 10
PIN 8 D- Violet PIN 4
PIN 9 D+ Yellow PIN 14
PIN 10 0V White/green PIN 7
PIN 11 Internal shield - PIN 17
PIN 12 B+ Blue/black PIN 11
PIN 13 B- Red/black PIN 12
PIN 14 C+ Gray PIN 5
PIN 15 A+ Green/black PIN 1
PIN 16 A- Yellow/black PIN 2
PIN 17 C- Pink PIN 6

Kit 1: Adapter Zn/Z1 OUT: Id.No. 349312-02 for flange socket OUT of interface board

Drive side (Mot.Enc.1Vpp) Signal Color PWM8 side (Pos.Enc.1Vpp)

Flange socket 17-pin, male Flange socket 17-pin,

knurled coupling ring

PIN 16 Up sensor Blue PIN 1
PIN 13 R- Black PIN 2
PIN 3 R+ Red PIN 3
PIN 15 0V sensor White PIN 4
PIN 8 Temp.+ Green PIN 5
PIN 9 Temp.- Brown PIN 6
PIN 10 Up Brown/green PIN 7
PIN 4 D- Violet PIN 8
PIN 14 D+ Yellow PIN 9
PIN 7 0V White/green PIN 10
PIN 17 Internal shield - PIN 11
PIN 11 B+ Blue/black PIN 12
PIN 12 B- Red/black PIN 13
PIN 5 C+ Gray PIN 14
PIN 1 A+ Green/black PIN 15
PIN 2 A- Yellow/black PIN 16
PIN 6 C- Pink PIN 17

- 79 -

18.9.2 Adapter kit 2 (EnDat/SSI) for operation with Siemens drives with HEIDENHAIN

EnDat/SSI encoders and non-HEIDENHAIN wiring

Kit 2: Adapter EnDat/SSI IN: Id.No. 349312-03 for flange socket IN of interface board

PWM8 side (Pos.Enc.EnDat) Signal Color Drive side (Mot.Enc.EnDat)

Flange socket 17-pin, male Flange socket 17-pin,

knurled coupling ring

PIN 1 Up sensor Blue PIN 16
PIN 2 n.c.
PIN 3 n.c.

PIN 4 0V sensor White PIN 15
PIN 5 Temp.+ Green PIN 8
PIN 6 Temp.- Brown PIN 9
PIN 7 Up Brown/green PIN 10
PIN 8 CLOCK+ Violet PIN 5
PIN 9 CLOCK- Yellow PIN 14
PIN 10 0V White/green PIN 7
PIN 11 Internal shield - PIN 17
PIN 12 B+ Blue/black PIN 11
PIN 13 B- Red/black PIN 12
PIN 14 DATA+ Gray PIN 3
PIN 15 A+ Green/black PIN 1
PIN 16 A- Yellow/black PIN 2
PIN 17 DATA- Pink PIN 13

Kit 2: Adapter EnDat/SSI OUT: Id.No. 349312-04 for flange socket OUT of interface board

Drive side (Mot.Enc.EnDat) Signal Color PWM8 side (Pos.Enc.EnDat)

Flange socket 17-pin, male Flange socket 17-pin,

knurled coupling ring

PIN 16 Up sensor Blue PIN 1

n.c. PIN 2

n.c. PIN 3
PIN 15 0V sensor White PIN 4
PIN 8 Temp.+ Green PIN 5
PIN 9 Temp.- Brown PIN 6
PIN 10 Up Brown/green PIN 7
PIN 5 CLOCK+ Violet PIN 8
PIN 14 CLOCK- Yellow PIN 9
PIN 7 0V White/green PIN 10
PIN 17 Internal shield - PIN 11
PIN 11 B+ BLUE/BLACK PIN 12
PIN 12 B- RED/BLACK PIN 13
PIN 3 DATA+ GRAY PIN 14
PIN 1 A+ GREEN/BLACK PIN 15
PIN 2 A- YELLOW/BLACK PIN 16
PIN 13 DATA- PINK PIN 17

- 80 -

18.10 Adapter cables for direct connection of PWM8 to the PCB connector
of the encoder

If the encoder is to be inspected with the cable assembly not known, the adapter cable with HEIDENHAIN
wiring must be directly connected to the PCB connector!

Note:
The 17-pin right-angle flange socket of the drive (encoder) may have different assignments

!

18.10.1 Adapter cable with 12-pin PCB connector

for 1Vpp encoders with EnDat or SSI interface

Adapter cable Id.No. 349839-xx / EnDat/SSI

Signal

Color

Coupling

17-pin, male

PIN 1 Up sensor Blue 7a
PIN 2 n.c. Black ­PIN 3 n.c. Red ­PIN 4 0V sensor White 3a
PIN 5 Temp.+ Green ­PIN 6 Temp.- Brown ­PIN 7 Up Brown/green 1b
PIN 8 CLOCK+ Violet 2b

PIN 9 CLOCK- Yellow 5a
PIN 10 0V White/green 4b
PIN 11 Internal shield - ­PIN 12 B+ Blue/black 4a
PIN 13 B- Red/black 3b
PIN 14 DATA+ Gray 6b
PIN 15 A+ Green/black 2a
PIN 16 A- Yellow/black 5b
PIN 17 DATA- Pink 1a

PCB connector

12-pin

Caution:

This cable is not intended for feed-through operation at the machine, since there are no lines for temperature
monitoring! Observe the shield!

- 81 -

18.10.2 Adapter cable with 14-pin PBC connector

e.g. ERN 1387 with incremental track Zn and analog commutating track Z1

Adapter cable Id.No. 330980-xx / Zn/Z1

Signal

Color

Coupling

17-pin, male

PIN 1 Up sensor blue 7a
PIN 2 R- black 4a
PIN 3 R+ Red 4b
PIN 4 0V sensor White 3a
PIN 5 Temp.+ Green ­PIN 6 Temp.- Brown ­PIN 7 Up Brown/green 1b
PIN 8 D- Violet 6a
PIN 9 D+ Yellow 2b
PIN 10 0V White/green 5b
PIN 11 Internal shield - ­PIN 12 B+ Blue/black 3b
PIN 13 B- Red/black 5a
PIN 14 C+ Gray 7b
PIN 15 A+ Green/black 6b
PIN 16 A- Yellow/black 2a
PIN 17 C- Pink 1a

PCB connector

14-pin

Caution:

This cable is not intended for feed-through operation at the machine, since there are no lines for temperature
monitoring! Observe the shield!

- 82 -

18.11 Adapter cable 17/17-pin; PWM to motor (Pos.Enc.EnDat)

Adapter cable Id.No. 323897-xx

Signal

Color

Coupling 17-pin,

male

PIN 1 UP – sensor or RxD Blue PIN 1
PIN 2 R- counting direction Black PIN 2

PIN 3 R+ or / UaS Red PIN 3
PIN 4 0V – sensor or TxD White PIN 4
PIN 5 + Temp. preset 1 Green PIN 5
PIN 6 - Temp. preset 2 Brown PIN 6
PIN 7 UP Brown/Green PIN 7

PIN 8 CLOCK+ Violet PIN 8
PIN 9 CLOCK- Yellow PIN 9
PIN 10 0V White/Green PIN 10
PIN 11 Internal shield - PIN 11
PIN 12 B+ Blue/Black PIN 12
PIN 13 B- Red/Black PIN 13
PIN 14 DATA+ Gray PIN 14
PIN 15 A+ Green/Black PIN 15
PIN 16 A- Yellow/Black PIN 16
PIN 17 DATA- Pink PIN 17

Connector housing External shield External shield Connector housing

Connector 17-pin,

female

- 83 -

18.12 Adapter cable to IK 115 interface card

Adapter cable Id.Nr. 324544-xx

Signal

17-pin female

connector

PIN 1 UP sensor Blue PIN 12
PIN 2 Free - PIN 7

PIN 3 Free - PIN 14
PIN 4 0 V sensor White PIN 10
PIN 5 Free - ­PIN 6 Free - ­PIN 7 UP Brown/Green PIN 4

PIN 8 CLOCK+ Violet PIN 8
PIN 9 CLOCK- Yellow PIN 15
PIN 10 0V (UN) White/Green PIN 2

PIN 11 Internal shield - PIN 6
PIN 12 B+ Blue/Black PIN 3
PIN 13 B- Red/Black PIN 11
PIN 14 DATA+ Gray PIN 5
PIN 15 A+ Green/Black PIN 1
PIN 16 A- Yellow/Black PIN 9
PIN 17 DATA- Pink PIN 13

Connector housing External shield External shield Connector housing

15-pin D-sub connector

Color

192103 54

11

(male)

12

687

13

14

15

- 84 -

18.13 Adapter cable 17/17-pin; PWM to motor (Mot.Enc.EnDat)

Adapter cable Id.Nr. 340302-xx

Signal

Color

17-pin female

connector

PIN 1 A+ Green/Black PIN 1
PIN 2 A- Yellow/Black PIN 2
PIN 3 DATA+ Red PIN 3
PIN 4 Free - PIN 4
PIN 5 CLOCK+ Green PIN 5
PIN 6 Free - PIN 6
PIN 7 0V (UN) White/Green PIN 7

PIN 8 Temp+ Yellow PIN 8
PIN 9 Temp- Violet PIN 9
PIN 10 +V (UP) Brown/Green PIN 10

PIN 11 B+ Blue/Black PIN 11
PIN 12 B- Red/Black PIN 12
PIN 13 DATA- Black PIN 13
PIN 14 CLOCK- Brown PIN 14
PIN 15 0 V sensor White PIN 15
PIN 16 +V sensor Blue PIN 16
PIN 17 Internal shield (0V) - PIN 17

Connector housing External shield External shield Connector housing

17-pin male coupling

- 85 -

18.14 Adapter cable 17/17-pin; PWM to motor (Mot.Enc.EnDat)

Adapter cable Id.Nr. 332115-xx

Signal

17-pin female

connector

PIN 1 Up Sensor Blue PIN 9
PIN 4 0V Sensor White PIN 11
PIN 7 Up Brown/Green PIN 1
PIN 8 CLOCK Violet PIN 14
PIN 9 CLOCK- Yellow PIN 15
PIN 10 0V (UN) White/Green PIN 2
PIN 11 Internal shield Internal shield PIN 13
PIN 12 B+ Blue/Black PIN 6
PIN 13 B- Red/Black PIN 7
PIN 14 DATA Gray PIN 5
PIN 15 A+ Green/Black PIN 3
PIN 16 A- Yellow/Black PIN 4
PIN 17 DATA- Pink PIN 8
PIN 2
PIN 3 Free - 10
PIN 5 12
PIN 6

Connector housing External shield External shield Connector housing

15-pin D-sub connector

Color

(female)

- 86 -

18.15 Adapter cable 17/25-pin; PWM to subsequent electronics (Mot.Enc.1Vpp)

Adapter cable Id.Nr. 289440-xx

Signal

17-pin female

connector

PIN 1 A+ Green/Black PIN 3
PIN 2 A- Yellow/Black PIN 4
PIN 3 R+ Red PIN 17
PIN 4 D- Pink PIN 22
PIN 5 C+ Green PIN 19
PIN 6 C- Brown PIN 20
PIN 7 0V (UN) White/Green PIN 2

PIN 8 Temp+ Yellow PIN 13
PIN 9 Temp- Violet PIN 25
PIN 10 +V (UP) Brown/Green PIN 1

PIN 11 B+ Blue/Black PIN 6
PIN 12 B- Red/Black PIN 7
PIN 13 R- Black PIN 18
PIN 14 D+ Gray PIN 21
PIN 15 0 V sensor White PIN 16
PIN 16 +5 V sensor Blue PIN 14
PIN 17 Internal shield (0V) Internal shield PIN 8

- Free - PIN 5

- Free - PIN 9

- Free - PIN 10

- Free - PIN 11

- Free - PIN 12

- Free - PIN 15

- Free - PIN 23

- Free - PIN 24

Connector housing External shield External shield Connector housing

25-pin D-sub connector

Color

385

1

141516 17 18 19 2 0 21

62

7

4

(female)

9

101112

22 23 24 25

13

- 87 -

18.16 Adapter cable 17/25-pin; PWM to subsequent electronics (Mot.Enc.EnDat)

Adapter cable Id.Nr. 336376-xx

Signal

17-pin female

connector

PIN 1 A+ Green/Black PIN 3
PIN 2 A- Yellow/Black PIN 4
PIN 3 DATA+ Red PIN 15
PIN 4 Free - ­PIN 5 CLOCK+ Green PIN 10
PIN 6 Free - ­PIN 7 0V (UN) White/Green PIN 2

PIN 8 Temp+ Yellow PIN 13
PIN 9 Temp- Violet PIN 25
PIN 10 +V (UP) Brown/Green PIN 1

PIN 11 B+ Blue/Black PIN 6
PIN 12 B- Red/Black PIN 7
PIN 13 DATA- Black PIN 23
PIN 14 CLOCK- Brown PIN 12
PIN 15 0 V sensor White PIN 16
PIN 16 +V sensor Blue PIN 14
PIN 17 Internal shield (0V) - PIN 8

- Free - PIN 5

- Free - PIN 9

- Free - PIN 11

- Free - PIN 17

- Free - PIN 18

- Free - PIN 19

- Free - PIN 20

- Free - PIN 21

- Free - PIN 22

- Free - PIN 24

Connector housing External shield External shield Connector housing

25-pin D-sub connector

Color

385

1

141516 17 18 19 2 0 21

62

7

4

(female)

9

101112

22 23 24 25

13

- 88 -

18.17 Adapter cable 17/17-pin; PWM to motor (Mot.Enc.1 Vpp)

Adapter cable Id.Nr. 336847-xx

Signal

Color

17-pin female

connector

PIN 1 A+ Green/Black PIN 1
PIN 2 A- Yellow/Black PIN 2
PIN 3 R+ Red PIN 3
PIN 4 D- Pink PIN 4
PIN 5 C+ Green PIN 5
PIN 6 C- Brown PIN 6
PIN 7 0V (UN) White/Green PIN 7

PIN 8 Temp+ Yellow PIN 8
PIN 9 Temp- Violet PIN 9
PIN 10 +V (UP) Brown/Green PIN 10

PIN 11 B+ Blue/Black PIN 11
PIN 12 B- Red/Black PIN 12
PIN 13 R- Black PIN 13
PIN 14 D+ Gray PIN 14
PIN 15 0 V sensor White PIN 15
PIN 16 +V sensor Blue PIN 16
PIN 17 Internal shield (0V) - PIN 17

Connector housing External shield External shield Connector housing

17-pin male coupling

- 89 -

Kundendienst/Service

(086 69) 9899

Technischer Kundendienst-Leiter

Technical Service Manager

Martin Spirkl

Reparatur-Innendienst/Außendienst

In-House and On-Site Repair Service

Gerhard Passinger

31-1456

31-1272

Kundendienst Dokumentation

Service Documentation

Rainer Rothfeld

Kundendienst Schulung

Service Training

Hannes Wechselberger

Kaufmännischer Kundendienst-Leiter

Commercial Service Manager

Hermann Mayer 31-1635

Ersatzteil-Verkauf

Replacement Parts Sales

Alfred Maier

Leih-/Austausch-Geräte

Loan and Exchange Units

Franz Ober

Reparatur-Auftragsbearbeitung/
Kostenvoranschläge

Repair Order Processing/Cost Estimates

31-1381

31-1743

31-1466

31-1100

31-1088

www.heidenhain.de

312 737-95 . 4 . 10/2003 . S . Printed in Germany · Änderungen vorbehalten · Subject to change without notice