13
Control Circuits
Use 0.75mm
2
wiring. All control circuits
should be screened as shown in the illustration
in the adjacent column.
NOTE If
control signals originate from a
process controller, it is recommended that
the screening should be terminated at the
source end rather than at the inverter as
shown in all illustrations in this manual.
Control wiring should be installed at least
300mm distant from any power system cables,
and if the two types of conductors must cross
they should be arranged as nearly as possible
at right angles to each other.
The function of each control terminal is given
in the table on the following page.
Control Input Circuits
Contactors or switch contacts should be care-
fully selected for high reliability and absence
of closing defects.
Control Output Circuit
Screening of Control Circuits
Control screening should be connected to a
0V common terminal at the inverter end only,
as shown below. If an external process con-
troller or PLC is used, it is recommended that
the screening should be connected at the end
remote from the inverter.
Suppression of Control Circuits
Sudden changes of flux in the operating coils
of relays and magnetic contactors induce high
transient EMFs which may cause ‘noise’ on
the control circuits, resulting in possible mal-
function of internal or external circuits. It is
advisable to suppress these coils in the manner
shown below.
Y1E
Control output circuit Y1E.
CM
CMC
RC
Jaguar
VXS
Field
+24V DC
from internal
source P24,
or external
(PLC etc).
Output from Y1E —
If internal supply from
P24, connect to
Inverter terminal CM.
If external supply (eg
PLC), connect to PLC
common terminal.
P24
FWD etc
General control input circuit.
24V to 27V DC
power supply
6mA max
CM
Jaguar
VXS
Field
FWD
P24
Screening of external control circuits.
13
12
11
Potentiometer
1k
Ω
, 1W
Field
contact
CM
C1
Surge suppression for relay and
contactor operating coils.
+
RC
-
CC
C
R
D
D = flywheel diode
RC = relay coil
R = 100
Ω
, C = 0.1
µ
f
CC = contactor coil
C = capacitor
R = resistor
Typically,
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Summary of Contents for Jaguar VXS
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