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Watson-Marlow 620DuN and 620Du User Manual 65
Note: All DC supplies are stabilised.
22.14 RS485 input
Connect your network link to J10 using a screened twisted
pair: A to A, B to B, screen to 0V. Ensure that the pump is
configured to operate under Network control. More than one
pump may be controlled with the same RS485 signal: con-
nect all pumps in parallel. See 25 Network control and oper-
ation.
DC Voltage Max load Typical use
+5V 10mA
Voltage supply for inputs using
remote switch.
Possible voltage supply for out-
puts if only 5V is required.
+12V 10mA
Possible voltage supply for inputs
using remote switch.
Possible voltage supply for out-
puts. Voltage supply for Watson-
Marlow Tube Monitor leak detec-
tor.
Part voltage supply (-12V also
needed) for the Watson-Marlow
proximity switch.
-12V 10mA
Part voltage supply (+12V also
needed) for the Watson-Marlow
proximity switch.
+10V
(from J7)
Reference voltage for remote
potentiometer speed control. Do
not use as a general supply volt-
age.