5
ANTRIEBSTECHNIK
6
10
5
KEB COMBIVERT F4-C
Name: Basis
19.11.98
6
Section
Page
Date
©
KEB Antriebstechnik, 1997
All Rights reserved
Chapter
Functional Description
Encoder Interface
Cut-off Frequency
Fig. 6.10.2.d
Input signals of channel 1 and 2
The cut-off frequency of the incremental encoder interface is 200 kHz. To ensure a safe
operation of the speed measurement following conditions must be met.
The maximum frequency of the incremental encoder signal must be smaller
than the cut-off frequency of the incremental encoder as well as of the
incremental encoder interface!
The maximum frequency of the incremental encoder signal is calculated according to
following formula:
KEB can supply a suitable encoder for the incremental encoder interface. This encoder
is also used on KEB standard motors. Furthermore, prefabricated encoder cables for
the connection to channel 1 (15-poles D-Sub) as well as to channel 2 (9-poles D-Sub)
are available.
Incremental encoder: 00.EK.QI1-0503
RS422; voltage supply 5V (±5%)
A, B and 0 - track; 2500 Inc / revolutions; max. 200kHz
Encoder cable:
Channel 1: 00.F4.109 - 000X (X = length in m; standard 5m)
Channel 2: 00.F4.209 - 000X (X = length in m; standard 5m)
As input signals at A+/A- or B+/B- TTL-differential voltage levels according to TIA/EIA-
RS422-B are expected.
Encoder and Cable
A+
A-
Invert signal to A+
Difference signal A
A+ in relation of A-
B+
90° phase shifting to A+
B-
Invert signal to B+
Difference signal B
B+ in relation of B-
2 .. 5 V
0 V
2 .. 5 V
0 V
-2 .. -5 V
2 .. 5 V
0 V
2 .. 5 V
0 V
2 .. 5 V
0 V
-2 .. -5 V
2 .. 5 V
0 V
-2 .. -5 V
2 .. 5 V
0 V
Signals at wrong
assignment of the signals
i.e. A+ in relation to B-
Signal Description
f
[kHz]
Encoder increments • speed
[1/ min]
Enc_ max
max
=
60000
