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13-6
Standard and Optional Equipment
590+ Series DC Digital Converter
Heatsink Cooling Fan Connections
When fitted, these fans are connected on the power board to FAN LIVE (F27), FAN
NEUTRAL (F24) and FAN COMMON (F23) as described below:
x
A single fan must be matched to the auxiliary supply and connected to F27 and F24.
x
Two fans using a 110/115V auxiliary supply must be connected in parallel to F27 and F24.
x
Two fans using a 220/240V auxiliary supply must be connected in series to F27 and F24
using F23 as the centre point.
Contactor Supply
The controller requires an ac or dc power
contactor in series with the main power
path to ensure correct power-up
sequencing. This contactor is directly
initiated by the Microcontroller via an
isolating relay which drives the contactor
coil with the same voltage as that of the
auxiliary supply.
This is achieved by the brown wire
connection from COIL LIVE (F28) to
RELAY (F25) and the blue wire
connection from COIL NEUTRAL (F21)
to CONTACTOR RETURN (F26).
However, if an alternative supply for the
contactor coil is required move the brown
wire from F25 to F22 , and move the blue
wire from F21 to F25. The external coil
supply can now be switched using a volt-
free contact between terminals D5 and D6.
F25
F23
F24
F21
FS1
D5
D6
D7
D8
F26
F22
F27
F28
F25
F23
F24
F21
FS1
D5
D6
D7
D8
F26
F22
F27
F28