Watson-Marlow 620DuN and 620Du User Manual 77
23.11 Supply voltages
In the table below, “Max load” is the maximum total load on each supply irrespec-
tive of the number of connections.
Note: All DC supplies are stabilised except the +22.5V.
DC
Voltage
Max
load
Lower
D
Upper
D
Typical use
+5V 10mA 9, 19, 23 18, 19
Voltage supply for inputs using
remote switch.
Possible voltage supply for outputs if
only 5V is required.
Pin 9 is specifically used for
footswitch / handswitch operation
+12V 10mA 25 21
Possible voltage supply for inputs
using remote switch.
Possible voltage supply for outputs.
Voltage supply for Watson-Marlow
Tube Monitor leak detector.
Part voltage supply (-12V also need-
ed) for the Watson-Marlow proximity
switch
-12V 10mA 24 -
Part voltage supply (+12V also need-
ed) for the Watson-Marlow proximity
switch
+22.5V - 20
Voltage supply for the 620N wash-
down module. Do not use
+10V 21 -
Reference voltage for remote poten-
tiometer speed control. Do not use
as a general supply voltage
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