Unidrive M Modular Installation Guide
89
Issue Number: 2
Common to all Feedback types
Sincos encoder resolution
The sine wave frequency can be up to 500 kHz but the resolution is
reduced at high frequency. Table shows the number of bits of
interpolated information at different frequencies and with different
voltage levels at the drive encoder port. The total resolution in bits per
revolution is the ELPR plus the number of bits of interpolated
information. Although it is possible to obtain 11 bits of interpolation
information, the nominal design value is 10 bits. Feedback resolution
based on frequency and voltage level
11
W, Clock, Not used, Not used
12
W\, Clock\, Not used, Not used
AB Servo (3), FD Servo(4), FR Servo (5
),
SC Servo (12)
Type
EIA 485 differential receivers
Maximum input frequency
512 kHz
Line loading
Line termination components
120
Ω
(switchable)
Working common mode range
–7 V to +12 V
SC EnDat (9), SC SSI (11)
Type
Differential voltage
Maximum Signal level
1.25 V peak to peak (sin with regard
to sinref and cos with regard to
cosref)
Maximum input frequency
See
Maximum applied differential voltage and
common mode voltage range
±
4 V
EnDat (8), SSI (10), BiSS (13)
Not used
Resolver (14)
Not used
Common to All
Absolute maximum applied voltage relative
to 0V
-9 V to 14 V
13
Feedback device supply
Supply voltage
5.15 V ±2 %, 8 V ± 5 % or 15 V ± 5 %
Maximum output current
300 mA for 5 V and 8 V
200 mA for 15 V
The voltage on Terminal 13 is controlled by Pr
03.036
. The default for this
parameter is 5 V (0) but this can be set to 8 V (1) or 15 V (2). Setting the encoder
voltage too high for the encoder could result in damage to the feedback device.
The termination resistors should be disabled if the outputs from the encoder are
higher than 5 V.
14
0 V Common
15
Motor thermistor input
Thermistor type is selected in
P1 Thermistor Type
(03.118).
Volt/Freq
1 kHz
5 kHz
50 kHz 100 kHz 200 kHz 500 kHz
1.2
11
11
10
10
9
8
1.0
11
11
10
9
9
7
0.8
10
10
10
9
8
7
0.6
10
10
9
9
8
7
0.4
9
9
9
8
7
6
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