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Interpolation unit AM-IPE4k

IPE4k low

The programmable interpolation unit IPE4k is intended for connection to incremental position and angle measuring systems with sinusoidal input signals that are phase-shifted by 90 °. It can be operated on a large number of encoder systems that work according to the most varied of measuring principles. The IPE4k realizes a subdivision of the signal periods up to 4096-fold. The interpolation unit works with both single-ended and differential input signals. The configuration can be done via the EEPROM or via USB. It is also possible to equip the unit with a serial interface and / or an active current / voltage converter.
An AMAC-specific gain and offset control as well as the possibility of a phase correction of the internal AM-IP4k guarantee a high measuring accuracy under industrial conditions.
The unit can be connected to a standard meter or controller via the RS422 interface. The internal operating voltage is 5 VDC. The functions of the interpolation circuit AM-IP4k such as switchable analog filters or digital hysteresis make the unit ideal for use in control systems.



Analog input
Sine / cosine / reference (index) signal; differential or single-ended
Nominal amplitude 1 Vpp / 500 mVpp / 250 mVpp / 75 mVpp
Maximum input frequency up to 220 kHz
ABZ 90 ° square wave signal (A / B / Z)
Adjustable width of the index signal Z between ¼ and 1 period A / B
Error signal
Interrupt signal for microcontroller
Auxiliary signals for sensor calibration
SPI 30 bit counter signal
16 bit multiturn counter
Data rate up to 500,000 readings / s
9 bit signal monitoring
Compatible with standard SPI: 16 bit, MSB first, up to 25 MHz
Signal filter for noise reduction
SSI 30 bit counter signal
16 bit multiturn counter
SSI 20Bit / 32Bit
2 bit signal monitoring
Gray code / binary code
Adjustable timing
SSI ring mode
other inputs Trigger signal for the measured value memory
Zero signal for setting and saving the zero point
Current output Control of a laser diode for optical sensors
Configuration options internal EEPROM
serial SPI interface
Interpolation/Signal processing
Interpolation rate Basic interpolation rates 4096 / 4000 / 3200 / 2560
Configurable dividers 1, 2 , 4, 8, 16, 32, 64, 128
Interpolation rate adjustable via EEPROM table, default interpolation rate 2560
Signal setting
AMAC-specific digital controller for offset, control range ± 10% of the nominal amplitude
AMAC-specific digital controller for amplitude, control range 60-120% of the nominal amplitude
Digital potentiometer with 64 steps for phase correction; Selectable setting range ± 5 ° or ± 10 °
Input signal monitoring with configurable error detection
Signal correction Wobble correction for periodic 360 ° errors
Waveform correction for periodic errors within a sine / cosine period
can be (de) activated separately
Interference suppression Adjustable low pass (cut-off frequencies 10 kHz, 75 kHz, 250 kHz)
digital hysteresis to suppress the edge noise at the output
Adjustable minimum edge separation at the output
Reference signal processing Adjustable reference position 0 ... 360 °
Determination of the reference position via SPI or auxiliary signals
Processing of distance-coded reference marks
Measured value trigger at the reference position
Miscellanious two-stage measured value trigger
programmable timer (3.2 µs ... 420 ms)
constant latency of 2.35 µs without signal correction and 3.95 µs with signal correction
Multiturn counter
Important characteristics
Operating voltage 5 VDC or 6...24 VDC
I/O-voltage, digital 3,3 VDC
Temperature range -40...+125°C
Interface frequency SPI 25 MHz (15 MHz via on-board USB-SPI-Konverter), SSI 5 MHz
Housing Continuous cast profile 55 mm x 141 mm x 24 mm Mounting bracket




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Description Article number
IPE4k Interpolationunit with AM-IP4k