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Installing the Converter
3-21
590+ Series DC Digital Converter
Internal Motor Field (default for this board)
Terminals F+ and F-, the motor field outputs, are energised when the 3-phase supply is
connected to L1/L2/L3. Terminals FL1 and FL2 are not required. The internal motor field
supply is fused by 10A fuses, FS5 & FS6.
External Motor Field
Terminals FL1 and FL2 can be used for external ac supply connection for the Motor Field
Supply. You should provide suitably rated external, fast-acting semi-conductor fusing, to a
maximum of 10A.
Caution
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 single-phase transformer.
L1 must be connected to FL1, and L2 connected to FL2.
The external field supply can now be connected and power restored to the drive.
Power Board - PCB Reference 385851 (Frame 3)
This power board (printed with the above number) can be altered for use with either an internal
or external motor field supply:
Internal Motor Field (default for this board)
Terminals D3 and D4, the motor field outputs, are energised when the 3-phase supply to
L1/L2/L3 is energised and the internal motor field is used. Terminals D1 and D2 are not
energised. The internal motor field supply is fused by the 10A fuses, FS2 & FS3.
External Motor Field Connections
Terminals D1 and D2 on the
Power Board can be used for
an external ac supply
connection for the Motor Field
Supply.
A simple re-wiring procedure
disconnects the internal motor
field supply and prepares
terminals D1 and D2 for the
external ac supply connection.
You should provide suitably
rated external, fast-acting
semi-conductor fusing, to a
maximum of 10A.
Re-Wiring Procedure
WARNING!
Isolate all power to the drive.
1. Loosen the control board fixing screws (2 off) and position the control board to allow access
to the power board.
2. Remove the
red
link from the Faston connector “F16” on the left-hand side of the board and
connect it to staging post “F19”, located below terminal D1.
3. Remove the
yellow
link wire from the Faston connector
“
F8” on the left-hand side of the
board and connect it to staging post
“
F18”, located below terminal D2.
POWER BOARD AH385851
D1
D2
D3
D4
Red
F8
F16
Yellow
F18
F19