Eurotherm 590+ Series, Product Manual, Page: 275 / 308

Standard and Optional Equipment
13-1
590+ Series DC Digital Converter
13
S
TANDARD AND
O
PTIONAL
E
QUIPMENT
Standard Equipment
Power Board Circuit Descriptions
AH470280U001, U002, U003, U004 (Frame 1)
(2 Quad and 4 Quad)
Power supplies for the controller are generated from the single phase auxiliary supply via a
Switched Mode Power Supply. The incoming supply is directly rectified to provide a high
voltage dc power rail. A high voltage transistor switches this rail on to the primary of a high
frequency transformer, the output of which is rectified and smoothed to provide the dc power
supply rails. The +15V dc rail is monitored via a reference element and a control signal returned
via an opto-isolator to the control element of the high voltage switching transistor. The other dc
rails (-15V & +24V dc) are generated via separate secondary windings which are rectified and
smoothed, with a separate SMPS element providing a reg5V dc rail. The SMPS operates
over a0n input voltage range of 110V to 240V ac
±
10%, 50/60Hz.
CONN 26 CONN 4
TP6
TP1
TP4
TP8
TP5
TP7
TP3
TP9
TP2
T15
T11
T9
T7
T8
T12
T10
T5
T3
T1
T2
T6
T4
CONN 24
TH 3
TH 2
TH1
T20
T21
TB3
RLY1
CONN 2
TB9 TB8
TB7 TB6 TB5
LK8 LK9
LK10
CONN 1
TB4
(to control board)
(to heatsink thermistor)
heatsink
(to fan 24V dc)
(to terminal board)
("motor" - 2Q)
("regen" - 4Q)
CT CT
Figure 13-1 590+ Power Board 4 Quad (AH470280U001, U002, U003, U004)