Eurotherm 590+ Series, Product Manual, Page: 246 / 308

11-10
Technical Specifications
590+ Series DC Digital Converter
Terminal Information - Power Board (Frames 1, 2, 4 & 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
Terminal Terminal
Terminal
Description
Description Description
Description
Terminal Function
Terminal Function Terminal Function
Terminal Function Signal Level
Signal Level Signal Level
Signal Level Terminal
Terminal Terminal
Terminal
Number
Number Number
Number
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
Voltage Control Voltage 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)
Field Output
F+ DC supply for motor field connections. 0.9 x Vac F+ (D4)
Auxiliary supply
Aux N Neutral 110-230V
50-60Hz line-to-line CONTROL
N (D7)
Auxiliary supply
Aux L Line
These terminals are the mains input connections
for the switch mode power supply and contactor
control relay supply. Refer to the Product Code
(Block 8) for the specified auxiliary voltage. Refer
to Cooling, page 11-19 when using separate ac
fans, (Frame H units). 110-230V
50-60Hz line-to-line L (D8)
Main contactor
coil
Con L Line
This terminal is the switched output from the
contactor control relay and is derived from the
auxiliary supply at terminal D8. The output is
internally fused at 3A hence contactor coils
having a high pick-up current must be operated
via a slave relay.
Note: The contacts of the Contactor Control
Relay are suppressed by a series connected
resistor (680 Ohms) and capacitor (22nF) to
protect the relay contacts. Users should be
aware that when the contactor Control Relay is
“De-energised”, a leakage current of
approximately 2mA can be expected and this
should be considered when interfacing to these
terminals. Typically, there could be the
energisation of very sensitive relays.
Auxiliary Supply Voltage EXT
CONTACTOR
3 (D5)
Main contactor
coil
Con N Neutral
This terminal is internally connected to the
auxiliary supply neutral and provides a
convenient connection point for the contactor coil
neutral connection. Auxiliary Supply Voltage 4 (D6)