DC Voltage

Max load

Typical use

 

 

 

 

 

Voltage supply for inputs using remote

+5V

10mA

switch.

Possible voltage supply for outputs if only 5V

 

 

 

 

is required.

 

 

Possible voltage supply for inputs using

 

 

 

 

remote switch.

 

 

Possible voltage supply for outputs. Voltage

+12V

10mA

supply for Watson-Marlow Tube Monitor leak

 

 

detector.

 

 

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

Reference voltage for remote potentiometer speed control. Do not use as a general supply

(from J7)

voltage.

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: connect all pumps in parallel. See 24 Network control and operation.

The shorting link at J20 must be cor- rectly positioned to allow RS485 control to function properly. Fit the shorting link of a single pump or of the last pump on a network line in the position marked INT on the three-pin header; fit the shorting link of all other pumps on the network line in the position marked EXT on the three-pin header.

Watson-Marlow 520DuN IP66/NEMA 4X User Manual

70

Page 70
Image 70
Watson & Sons 520DUN user manual 22.14 RS485 input, DC Voltage Max load Typical use

520DUN specifications

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