Parker 590 series - Terminal Information (Power Board)

11-8 Technical Specifications
590 Series DC Digital Converter
Terminal Information (Power Board)
Terminal
Description
Terminal Function Signal Level Terminal
Number
External field supply
FL1
External single phase ac Line 1 input to field bridge. 500V ac maximum,
50-60Hz line-to-line
D1
External field supply
FL2
External single phase ac Line 2 input to field bridge.
Required AC Input Voltage = 1.11 x Nominal DC Output.
The field regulator will control the field current provided that the
Nominal DC Output voltage exceeds the field voltage by at
least 10%.
i.e. V
AC
= 1.11 x V
DC
and V
DC
= 1.1 x V
FIELD
therefore V
AC
= 1.22 x V
FIELD
The external AC supply must be fitted with high speed fuses to
protect the field regulator. For controllers with 10A field
capability 10A fuses should be used, those with 20A field
capability 20A fuses.
Note: When using an external ac input it is important to have
the correct phase relationship on the terminals. The supply
must be derived from L1 (Red) and L2 (Yellow) phases directly or
indirectly through a transformer. L1 must be connected to D1,
and L2 to D2.
500V ac maximum,
50-60Hz line-to-line
D2
Field Output
F+
DC supply for motor field connections. 0.9 x Vac D4
Field Output
F-
DC supply for motor field connections.
The DC output voltage at these terminals will depend upon the
AC supply voltage and the mode of field control.
Voltage Control
The output voltage will be determined by the ratio parameter in
the field variables. The relationship between the dc output
voltage and AC input voltage is determined by the equation:-
Vdc
Vratio x VAC
100
=
The default value of Vratio is 90% hence the DC output voltage
will be the same as for a full wave diode rectifier i.e., 90% is
maximum output.
0.9 x Vac D3