8 | Encoder interfaces
KEB Automation KG
32
ma_dr_f6-cu-a-inst-20118593_en
max. encoder current • 2 • wire resistor per meter
voltage supply - min. encoder voltage
max. encoder cable length =
Abb. 5:
Encoder cable length
The supply voltage depends on the set encoder. The other values can be found in
the data sheet of the encoder and the encoder cable.
8.5 Description of the encoder interfaces
PIN
Signals
Description
1, 2, 3,
4
A+/-
B+/-
Cos+/-
Sin+/-
Only channel A:
Input for two sine-wave, shifted by 90° differential signals with 1 Vpp, maximum 200 kHz.
Single-ended (e.g. Cos+ against GND):
Constant component 2.5 V ±0.5 V
Differential (e.g. Cos+ against Cos-):
Constant component 0 V ±0.1 V
signal level Uss=0.6 V…1.2 V
Channel A:
Input for square-wave incremental signals according to RS485 maximum 200 kHz.
Channel B:
Input for square-wave incremental signals according to RS485 maximum 500 kHz.
Incremental encoder simulation: Position changes of channel A are output to channel B with
two 90° shifted RS485 signals.Maximum output frequency 500 kHz.
5, 6
N+/-
Only channel A:
Input zero signal once per revolution.
Differential signal level (N+ … N-):
• higher 50 mV: zero signal is active
• from 50 mV to -50 mV: undefined
• lower -50 mV: zero signal is inactive
Signal length 330°…360° of the signal length of the incremental signals.
Channel A and B:
Input zero signal or data RS485.
Zero signal is 1-active, if signals A and B are also 1-active.
only channel B:
Output zero signal RS485.
Zero signal is 1-active, if signals A and B are also 1-active.
Is output, if the position on channel A is 0°.
Data+/-
10, 11,
12, 13
Sin+/-
Cos+/-
/-
/-
Only channel A:
Input for sinusoidal absolute signals
Uss=1 V for SinCos encoder
Uss=3.8 V maximum for resolver
10, 12 Clock+/-
Output for clock signal RS485
14, 15 /-
Only channel A:
Output field voltage for resolver:
Ueff=2.54 V
≙
Uss=7.2 V ±5 %; max. Ieff=30 mA; 10 kHz
Coupling factor for resolver: 0.5 ±10 %
Phase shifting 0° ±5°
