E-18 Technical Specifications
DC590+ Series DC Digital Drive
Terminal Information - Power Board (Frames 1-5)
Note that on Frame 1 and 2 units, L1, L2, L3, A+ and A- terminals are located on a separate Terminal Board. On Frame 3, 4 & 5 units, they are
busbar connections.
Frame 3 units have terminal designations D1 to D8, shown in brackets in the Terminal Number column of this table.
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
FL1 (D1)
External field supply
FL2
This feature not
available on Frame 1
units
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.
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 FL1, and L2 to FL2.
500V ac maximum,
50-60Hz line-to-line
FL2 (D2)
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 F– (D3)
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