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Safety
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50
Unidrive User Guide
www.controltechniques.com Issue Number: 9
N
The common 0V from analog signals, wherever possible, should not be
connected to the same 0V terminal as the common 0V from digital
signals. Terminals 3 and 11 should be used for connecting the 0V
common of analog signals and terminals 21, 23 and 31 for digital
signals. This is to prevent small voltage drops in the terminal
connections causing inaccuracies in the analog signals.
Figure 4-15 Unidrive default terminal functions (except Unidrive VTC)
The control circuits are isolated from the power circuits in the
drive by basic insulation only. The installer must ensure that
the external control circuits are insulated from human contact
by at least one layer of insulation rated for use at the AC
supply voltage.
If the control circuits are to be connected to other circuits
classified as Safety Extra Low Voltage (SELV) (e.g. to a
personal computer), an additional isolating barrier must be
included in order to maintain the SELV classification.
CAUTION
WARNING
NOTE
Status relay
Drive normal
0V common
Analog frequency/speed
reference 1
Motor thermistor
SPEED
TORQUE
0V common
1
11
Connections for
single-ended input
signal
Connections for
differential input signal
0V common
Signal connector
21
31
Analog
frequency/speed
reference 2
OL> AT SPEED
CL> AT ZERO SPEED
RESET
JOG SELECT
RUN FORWARD
RUN REVERSE
ANALOG INPUT 1 /
INPUT 2 SELECT
OL> External trip
CL> Drive enable
0V common
0V common
Analog input 1
0V common
1
2
5
6
3
4
7
11
9
10
8
21
22
23
24
25
26
27
28
29
30
31
Analog input 2
Содержание Unidrive 1 Series
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