Digitax ST User Guide
35
Issue: 5
4.14.1 Control terminal specification
T8 analog input 3 has a parallel connection to terminal 15 of the drive
input encoder connector.
1
0V common
Function
Common connection for all external
devices
2
+24 V external input
Function
To supply the control circuit
without providing a supply to the
power stage
Nominal voltage
+24.0 Vdc
Minimum continuous
operating voltage
+19.2 Vdc
Maximum continuous
operating voltage
+30.0 Vdc
Minimum start-up voltage
21.6 Vdc
Recommended power supply
60 W 24 Vdc nominal
Recommended fuse
3 A, 50 Vdc
3
0V common
Function
Common connection for all external
devices
4
+10V user output
Function
Supply for external analog devices
Voltage tolerance
±
1 %
Maximum output current
10 mA
Protection
Current limit and trip @ 30 mA
Precision reference Analog input 1
5
Non-inverting input
6
Inverting input
Default function
Speed reference
Type of input
Bipolar differential analog
(For single-ended use, connect
terminal 6 to terminal 3)
Full scale voltage range
±
9.8 V
±
1 %
Absolute maximum
voltage range
±
36 V relative to 0V
Working common mode
voltage range
±
13 V relative to 0V
Input resistance
100 k
Ω ±
1%
Resolution
16-bit plus sign (as speed reference)
Monotonic
Yes (including 0V)
Dead band
None (including 0V)
Jumps
None (including 0V)
Maximum offset
700
μ
V
Maximum non linearity
0.3 % of input
Maximum gain asymmetry
0.5 %
Input filter bandwidth single
pole
~1 kHz
Sampling period
250
μ
s with destinations as Pr
1.36
,
Pr
1.37
or Pr
3.22
.
7
Analog input 2
Default function
Speed reference
Type of input
Bipolar single-ended analog voltage
or unipolar current
Mode controlled by...
Pr
7.11
Operating in Voltage mode
Full scale voltage range
±
9.8 V
±
3 %
Maximum offset
±
30 mV
Absolute maximum
voltage range
±
36 V relative to 0V
Input resistance
>100 k
Ω
Operating in current mode
Current ranges
0 to 20 mA
±
5 %, 20 to 0 mA
±
5 %,
4 to 20 mA
±
5 %, 20 to 4 mA
±
5 %
Maximum offset
250
μ
A
Absolute maximum voltage
(reverse bias)
−
36 V max
Absolute maximum current
+70 mA
Equivalent input resistance
≤
200
Ω
at 20 mA
Resolution
10 bit + sign
Sample period
250
μ
s when configured as voltage
input with destinations as Pr
1.36
,
Pr
1.37
, Pr
3.22
or Pr
4.08
.
8
Analog input 3
Default function
Motor thermistor input (PTC)
Type of input
Bipolar single-ended analog voltage,
unipolar current or motor thermistor
input
Mode controlled by...
Pr
7.15
Operating in Voltage mode (default)
Voltage range
±
9.8 V
±
3 %
Maximum offset
±
30 mV
Absolute maximum
voltage range
±
36 V relative to 0V
Input resistance
>100 k
Ω
Operating in current mode
Current ranges
0 to 20 mA
±
5 %, 20 to 0 mA
±
5 %,
4 to 20 mA
±
5 %, 20 to 4 mA
±
5 %
Maximum offset
250
μ
A
Absolute maximum voltage
(reverse bias)
−
36 V max
Absolute maximum current
+70 mA
Equivalent input resistance
≤
200
Ω
at 20 mA
Operating in thermistor input mode
Internal pull-up voltage
<5 V
Trip threshold resistance
3.3 k
Ω
±
10 %
Reset resistance
1.8 k
Ω
±
10 %
Short-circuit detection
resistance
50
Ω
±
30 %
Resolution
10 bit + sign
Sample period
250
μ
s when configured as voltage
input with destinations as Pr
1.36
,
Pr
1.37
, Pr
3.22
or Pr
4.08
.
Summary of Contents for Digitax ST
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