MEGATRON Elektronik GmbH & Co. KG ▪ Hermann-Oberth-Strasse 7 ▪ 85640 Putzbrunn / Munich

Tel.: +49 89 46094-0 ▪ www.megatron.de ▪ info@megatron.de

Date: 06/29/2022

Page 9

Specications are subject to change without notice

Series ETP25Absolute Encoders with Pulse Width Modulation (PWM)

Function description PWM signal output ETP25

The ETP25 provides a constant carrier frequency with 244 Hz at the signal output, with HIGH and LOW signal levels which

have a constant signal amplitude. A constant carrier frequency means a constant length of the period duration. The duty cycle

and thus the pulse width changes in dependency of the rotating angle between 10% to 90% relative to the signal period.

If the CW option is selected, the duty cycle increases clockwise when turning the shaft clockwise. If the CCW option is select-

ed, the duty cycle decreases clockwise if the shaft is turned clockwise. Normally no signal conversion is required for further

processing of the output signal, because many µControllers already have an input for PWM signals.

Series ETP25 – singleturn, PWM output, not redundant

Key features ETP25:

 PWM signal output

 Frequency 244 Hz (constant)

 Pulse width (duty cycle) 10% (0°) to 90% (360°)

 Supply voltage: 5 VDC +/-10%

Electrical data ETP25 – singleturn, PWM output, not redundant

E󰀨ective electrical angle of rotation 1.) 10° ≤ α ≤ 360° (programmable in factory), ±0.5°

Independent linearity (best straight line) 1.) ±0.4% @ 360°

Absolute Linearity 1.) ±0.6% @ 360°

Output signal PWM (pulse width modulation)

Output signal voltage 5 V

Carrier frequency 244 Hz (constant)

Minimum duty cycle 10%, equal to app. 0.4 ms

Maximum duty cycle 90%, equal to app. 3.5 ms

Resolution 12 Bit

Supply voltage 5 V ±10%

Power consumption (no load) ≤ 10 mA

Output load ≥ 5 kOhm

Insulation voltage 1.) 1000 VAC @ 50 Hz, 1 min

Insulation resistance 1.) 2 MOhm @ 500 VDC, 1 min

MTTF (EN29500-2005-1) 1267a

1.) According IEC 60393

Cable and pin assignment

Function Option L Option F (flat ribbon) Option R (round cable)

OUT PIN 1 Lead 2 brown

VSUP PIN 2 Lead 1 (red) red

GND PIN 3 Lead 3 black

For details on zero point definition and output programming see page 28.

MEGATRON Elektronik GmbH & Co. KG ▪ Hermann-Oberth-Strasse 7 ▪ 85640 Putzbrunn / Munich

Tel.: +49 89 46094-0 ▪ www.megatron.de ▪ info@megatron.de

Date: 06/29/2022

Page 10

Specications are subject to change without notice

Series ETP25Absolute Encoders with Pulse Width Modulation (PWM)

Order example ETP25 – singleturn, PWM output, not redundant

Requirement:

Shaft Ø 6.00 mm, shaft length 22 mm, VSUP=5 V / OUT=244 Hz, sense of rotation CW, rotation angle 360°, no shaft sealing,

electrical connection solder holes, anti-rotation pin A

Example for order code:

ETP25 6,35x22 5PWM CW 360 LA

Order Code ETP25 – singleturn, PWM output, not redundant

Description

Selection: standard=black/bold, possible options=grey/italic

Series

ETP25

Shaft diameter, shaft length:

Shaft diameter Ø 6 mm, shaft length 22 mm

Shaft diameter Ø 6.35 mm, shaft length 22 mm

Custom shaft dimensions [mm] Ø ≤6.35mm

6x22

6,35x22

XxXX

Supply voltage / output signal:

VSUP=5 V (4.5...5.5 V) / OUT=5 V / 244 Hz / PWM 10-90%

5PWM

Mechanical stop/centre detent:

None

Mechanical stop (90, 180, 270 or 320°)

Stop and centre detent (at 0°)

Sense of rotation: (when looking at the shaft, from the front)

Clockwise

Counterclockwise

CCW

Rotation angle* in [°]:

360 (not available with mechanical stop)

320

270

180

Custom rotation angle (≥10°, positive integer, not available with mechanical stop)

360

320

270

180

XXX

Operational Torque:

Standard torque

Improved/medium torque

Shaft sealing:

None

With shaft sealing

Electrical connection, cable length:

Solder holes

Flat ribbon cable, standard length 0.15 m

Flat ribbon cable with custom length [x,xx m]

Round cable, standard length 1 m

Round cable with custom length [x,xx m]

F0,15

FX,XX

R1,00

RX,XX

Anti-rotation pin, zero point denition:

Pin A (not available with mechanical stop)

Pin B

None (pins removed) (no zero point denition possible)

* Without a mechanical stop, this value corresponds to the e󰀨ective electrical angle. With a mechanical stop, the mechanical angle of rotation

is determined by this value and the e󰀨ective electrical angle of rotation is 10° smaller than the mechanical angle of rotation. For details see

page 29.