Specifications: Interface Board 1Vpp, Absolute; Encoder Input (In); Encoder Output (Out); Signal Assignment Of The Bnc Sockets - HEIDENHAIN PWM 8 Operating Instructions Manual

18 Specifications: Interface Board 1Vpp, absolute

18.1 Encoder input (IN)

Signal voltage:
Input frequency for 1Vpp signals:
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:

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
Signals on BNC socket B
Signals on BNC socket C
1Vpp encoder, track CD
Signals on BNC socket A
Signals on BNC socket B
Signals on BNC socket C
1Vpp encoder with EnDat or SSI interface
Signals on BNC socket A
Signals on BNC socket B
Signals on BNC socket C

18.4 Measuring encoder current/voltage

Measuring range for current:
Measuring range for voltage:
Tolerance:

18.5 Measuring signal amplitudes

Measuring range:
Measuring frequency:
Tolerance without adjustment by software:
Tolerance with adjustment by software:

18.6 Display of /UaS interference signal

Track signal A and track signal B:

18.7 Terminating resistors

Terminating resistor: tracks A, B
Terminating resistor: tracks C, D
Terminating resistor: data, clock
5 Vpp max.
approx. 500 kHz
like input signal without U
approx. 1 MHz (3dB)
A, R, A
B, A+B, B
R, Up,/UaS EXE
C, R, C
D, C+D, D
R, Up /UaS EXE
A, CLK+, DAT-
B, CLK-, DAT+
/UaS, Up, Up
0 - 500 mA
0 - 30 V
± 5 %
0.2 V – 1.6 V
pp
10 Hz - 50 kHz
± 5 %
± 3 %
< 0.3 Vpp
121Ω
1kΩ
not possible!
- 76 -
0
pp